Vitality Herbs for Energy and Endurance: The Ultimate Guide to Natural Wellness
Last Updated: February 27, 2026
Regenerative soil biology creates the environmental stress necessary for Ashwagandha to synthesize its full spectrum of stress-modulating withanolides.
It is the withanolides in Ashwagandha that steady the stress response. It is the ginsenosides in Ginseng that elevate cellular energy. It is the silicic acid and chlorophyll density in Nettle that flood the body with bioavailable iron. These are the molecules that separate a truly medicinal herb from an inert green powder sitting in a warehouse. But here is the part that rarely gets discussed: these compounds are not simply "in" the plant. They are defense mechanisms, created when the plant is challenged by living soil microbes, competing fungi, and the stress of a biologically active ecosystem. Chemistry created by struggle, not comfort.
This is why we at Sacred Plant Co view every herb through the lens of regenerative agriculture. When soil is biologically dead, plants have nothing to struggle against, and the secondary metabolites that define their medicinal power never fully develop. Our approach, rooted in Korean Natural Farming (KNF) methods at I·M·POSSIBLE Farm, is designed to build the microbial ecosystems that force plants to produce the very compounds you are reading about. The results are measurable. Our independent lab work produced a Haney Score of 25.4, surpassing pristine forest soil, which tells us the biology in our ground is alive, diverse, and actively pushing our plants toward their full phytochemical potential.
In this guide, we go deep into the vitality herbs that traditional medicine systems have relied upon for millennia, the modern research validating their effects, and, critically, why the quality of the soil they come from determines whether they actually work.
What You'll Learn
- How adaptogens like Ashwagandha, Ginseng, and Rhodiola restore energy without stimulant crashes
- The science behind withanolides, ginsenosides, and eleutherosides, and how soil biology determines their concentration
- Traditional Ayurvedic, TCM, and Western herbalism approaches to vitality and endurance
- How to identify premium vitality herbs using sensory cues: color, texture, and aroma
- Safe preparation methods, dosage guidelines, and synergistic herb combinations
- Four practical recipes for daily vitality: teas, tonics, smoothies, and soups
- Key safety considerations, contraindications, and when to consult a healthcare provider
- Why regenerative growing methods produce measurably more potent medicinal herbs
What Are Vitality Herbs?
True vitality isn't borrowed from synthetic stimulants; it is carefully rebuilt at the cellular level through proper herbal tonification and mineral replenishment.
Vitality herbs are plants that support sustained energy production, stress adaptation, and systemic endurance without overstimulating the nervous system. Unlike caffeine or synthetic stimulants that borrow energy from the future and leave you in deficit, vitality herbs work with the body's own regulatory systems to build genuine, lasting stamina.
The category encompasses three overlapping functional groups. Adaptogens like Ashwagandha and Rhodiola Rosea modulate the hypothalamic-pituitary-adrenal (HPA) axis, helping the body calibrate its stress response rather than simply suppressing or amplifying it.1 Circulatory tonics like American Ginseng and Ginger enhance blood flow, oxygen delivery, and mitochondrial function. Nutritive tonics like Stinging Nettle supply the raw minerals, including iron, magnesium, calcium, and silica, that serve as cofactors in energy metabolism.
Traditional Systems and Vitality
Every major herbal tradition has a vitality category. In Ayurveda, these are the Rasayana herbs, literally "path of essence," used to rebuild ojas (vital energy) after illness or chronic depletion. Ashwagandha sits at the center of this tradition. In Traditional Chinese Medicine (TCM), the concept of Qi tonification governs this space. Ginseng (Ren Shen) and Astragalus (Huang Qi) are the two pillars used to restore depleted Qi and Wei Qi (defensive energy).2 In the Western eclectic tradition, Nettle and Oat Straw served as the foundation of "tonic formulas" prescribed for convalescence and long-term stamina.
The Core Vitality Herbs: Botanical Profiles and Research
The most effective vitality herbs share a common trait: they contain high concentrations of bioactive secondary metabolites that modulate stress pathways, energy production, and immune resilience. Below, we examine the key players and the research behind them.
Ashwagandha (Withania somnifera)
Ashwagandha is the cornerstone Rasayana herb of Ayurveda, prized for over 3,000 years as a rejuvenative that restores depleted vitality. Its key active compounds, the withanolides, function as steroidal lactones that modulate cortisol output, GABA receptor activity, and thyroid hormone levels.1 A landmark 2012 study published in the Indian Journal of Psychological Medicine found that participants taking 600mg of standardized Ashwagandha extract daily experienced a 27.9% reduction in serum cortisol levels after 60 days, alongside significant improvements in perceived stress and quality of life.3
Because Ashwagandha operates as a true adaptogen, it does not simply "boost" energy. Rather, it helps the body find its own homeostatic balance, which is why it simultaneously supports those who feel wired and those who feel depleted. For deeper exploration, our guide to Ashwagandha as a rejuvenating herb of vitality covers its full traditional and modern profile.

Ashwagandha Root - Premium Withania Somnifera
Cut and sifted Ashwagandha root, ideal for decoctions, tincture-making, and powdering. A cornerstone adaptogen for stress resilience and deep vitality.
View Ashwagandha RootAmerican Ginseng (Panax quinquefolius)
Ginseng is arguably the most studied medicinal plant on Earth. The active compounds, called ginsenosides, are triterpene saponins that influence the central nervous system, endocrine function, and cellular energy production. American Ginseng (Panax quinquefolius) is considered "cooler" than its Asian counterpart (Panax ginseng), making it a better fit for individuals who tend to run warm or who experience anxiety alongside fatigue.4
Clinical research has repeatedly demonstrated Ginseng's ability to reduce fatigue and enhance cognitive function. A 2018 systematic review in the Journal of Ginseng Research confirmed that ginsenosides improve physical endurance, mental clarity, and immune function across multiple randomized controlled trials.4 If you are weighing Ginseng against other root-based energy herbs, our comparison of Ginseng vs. Maca as daily energy boosters breaks down the practical differences.

American Ginseng Root - Panax Quinquefolius
Whole dried American Ginseng root, slow-matured for maximum ginsenoside density. Ideal for decoctions, slicing into soups, or chewing directly.
View American Ginseng RootStinging Nettle (Urtica dioica)
Where adaptogens modulate stress chemistry, Nettle takes a fundamentally different approach: it replenishes the mineral and nutrient reserves that become depleted during prolonged stress and physical exertion. Nettle leaf is exceptionally rich in bioavailable iron, magnesium, calcium, silica, and chlorophyll. A study in the Journal of Ethnopharmacology confirmed Nettle's anti-inflammatory and antioxidant properties alongside its dense nutritional profile.5 For anyone dealing with fatigue linked to mineral depletion, including athletes, postpartum individuals, and those with heavy menstrual cycles, Nettle is often the missing foundation. Explore all ten documented benefits in our guide to the surprising health benefits of Stinging Nettle Leaf.

Stinging Nettle Leaf - Urtica Dioica
Premium dried Stinging Nettle leaf, rich in iron and chlorophyll. Excellent for long-steeped infusions, culinary use, and as a foundation in any vitality formula.
View Stinging Nettle LeafAstragalus Root (Astragalus membranaceus / Huang Qi)
In TCM, Astragalus is classified as a superior Qi tonic, meaning it can be taken long-term to build foundational energy and immune resilience. Its active compounds, astragalosides and polysaccharides, have been shown to enhance white blood cell activity, support telomere integrity, and modulate inflammatory cytokines.6 Astragalus is uniquely positioned as both an energy herb and an immune herb, making it invaluable during seasonal transitions or recovery from illness.

Astragalus Root - Cut & Sifted Huang Qi
Cut and sifted Astragalus Root, perfect for long simmering in broths, decoctions, and traditional TCM formulas that build deep, sustained energy.
View Astragalus RootSupporting Vitality Herbs: Ginger, Ginkgo, and Eleuthero
Beyond the primary adaptogens, several supporting herbs round out a complete vitality protocol. Ginger Root (starting at $10.98) enhances peripheral circulation, aids nutrient absorption, and warms the digestive fire, which in both TCM and Ayurveda is considered the root of all energy production. Ginkgo Biloba (starting at $13.13) targets cerebrovascular circulation specifically, improving oxygen delivery to the brain and supporting cognitive stamina, making it a natural partner for mental clarity alongside physical vitality.7 Eleuthero Root (starting at $13.80), often called Siberian Ginseng, contains eleutherosides that support endurance and work capacity, which is why it was famously used by Soviet athletes and cosmonauts during the Cold War. To learn more about how adaptogenic herbs build resilience through demanding seasons, our guide to adaptogenic herbs for winter covers protocols in detail.
How to Identify Premium Vitality Herbs
The sensory profile of a vitality herb, its color, texture, aroma, and taste, is the most immediate and reliable indicator of its medicinal quality. Herbs that have been properly grown in biologically active soil, harvested at peak potency, and carefully dried will always announce themselves to your senses. If it does not bite back, it is not working.
Ashwagandha Root
Premium Ashwagandha root should exhibit a warm, distinctly "horsey" aroma, which is the origin of its Sanskrit name (ashwa = horse, gandha = smell). The cut pieces should be a creamy tan to light brown, never grey or uniform in color. When you break a piece, the interior should be fibrous and slightly starchy, not powdery or hollow. A truly potent root will have a sharp, bitter bite that lingers on the tongue. Dull, nearly odorless Ashwagandha has likely been stored too long or grown in depleted soil where withanolide production was minimal.
Ginseng Root
High-quality American Ginseng root should feel dense and hard when dried, resisting easy snapping. The exterior should have a buff to golden tan color with visible growth rings on the cross-section. The aroma should be distinctly sweet and earthy, almost parsnip-like. When chewed, you should experience an initial sweetness followed by a rising bitterness that indicates ginsenoside concentration. Avoid roots that feel lightweight, look uniformly pale, or lack any noticeable aroma.
Stinging Nettle Leaf
Look for a vivid, deep green color. Nettle that has oxidized will appear brown or olive, and this visual shift corresponds directly to a loss of chlorophyll and mineral content. The leaves should feel papery but not crumbling to dust at the slightest touch. When you open the bag, the aroma should be intensely green and "alive," reminiscent of fresh-cut hay with mineral undertones. Brewing a long infusion of properly dried Nettle should yield a deeply green, almost opaque liquor. Pale, straw-colored infusions indicate depleted material.
Astragalus Root
Quality Astragalus slices should have a pale yellow interior with visible fibrous texture. The slices should be flexible, bending slightly rather than snapping brittle. The aroma is mild and faintly sweet. When chewed, high-quality Astragalus has a mild sweetness similar to licorice root but less pronounced. Astragalus that has lost its flexibility and tastes flat has likely lost much of its polysaccharide content.
Benefits of Vitality Herbs for Energy and Well-Being
By modulating the HPA axis and optimizing cortisol rhythms, adaptogenic herbs help your body generate its own sustainable energy over time.
Vitality herbs deliver their benefits through multiple, complementary mechanisms: HPA axis regulation, mitochondrial support, mineral replenishment, and circulatory enhancement. This multi-pathway approach is why herbal vitality support tends to feel more sustainable than single-compound stimulants.
Sustained Energy Without Crashes. Adaptogens like Ginseng and Ashwagandha do not spike adrenaline or cortisol to create temporary alertness. Instead, they help optimize the HPA axis so your body produces and regulates energy more efficiently on its own. The effect builds over days and weeks of consistent use, resulting in a baseline elevation in available energy rather than peaks and valleys.1
Enhanced Physical and Mental Endurance. Rhodiola Rosea and Eleuthero have been studied extensively for their effects on work capacity and exercise performance. A meta-analysis published in Phytomedicine found that Rhodiola significantly improved physical endurance and reduced perceived exertion in both trained athletes and sedentary individuals.8
Stress Resilience and Cortisol Regulation. Chronic stress drains vitality by keeping cortisol chronically elevated, which impairs sleep, digestion, and immune function. Ashwagandha's documented 27.9% cortisol reduction addresses this root cause directly.3 When stress is managed at the hormonal level, energy naturally returns. For those navigating adrenal depletion specifically, our guide to herbs for adrenal fatigue offers targeted protocols.
Immune System Fortification. Astragalus Root is one of the most researched immunomodulatory herbs, with studies demonstrating enhanced T-cell activity and increased production of immunoglobulin.6 Energy and immunity are deeply interconnected. When the immune system is well-supported, the body spends less metabolic energy on chronic low-grade inflammation.
Improved Circulation and Oxygenation. Ginger and Ginkgo both enhance peripheral blood flow, which directly impacts how efficiently nutrients and oxygen reach tissues. This is particularly relevant for cognitive vitality. Ginkgo Biloba's flavonoid glycosides and terpene lactones have been shown to improve cerebral blood flow and protect neural tissue from oxidative damage.7 For a deeper dive into herbs that specifically support cognitive function, explore our article on memory-enhancing herbs for a sharper mind.
Preparation Methods and Ritual
The preparation method you choose should match the herb's chemistry, the compounds you want to extract, and the pace of your daily rhythm. Different vitality herbs yield their medicine through different solvents and time frames.
Long-Steeped Nettle Infusion (Nutritive Extraction)
For mineral-dense herbs like Nettle, a standard 5-minute steep extracts only a fraction of the available nutrition. The traditional herbalist method is a long infusion: place 1 ounce (about 1 cup loosely packed) of dried Nettle leaf in a quart mason jar, fill with just-boiled water, cap tightly, and steep for 4 to 8 hours or overnight. Strain and drink throughout the following day. This method extracts the full spectrum of iron, magnesium, calcium, and silica. For a detailed walkthrough, see our guide to brewing the perfect Stinging Nettle tea.
Decoctions for Roots (Ginseng, Ashwagandha, Astragalus)
Hard, woody roots require simmering to release their compounds. Place 1 to 2 teaspoons of dried root in 2 cups of water and bring to a gentle simmer. Maintain the simmer for 20 to 30 minutes, then strain. This method is essential for Astragalus polysaccharides, Ashwagandha withanolides, and Ginseng ginsenosides. In TCM tradition, root decoctions are often simmered with a few slices of Ginger to improve bioavailability and warm the digestive system.
Tinctures for Rapid Absorption
Alcohol-based tinctures offer the most convenient and rapidly absorbed form of herbal medicine. Our Stinging Nettle Tincture (starting at $9.99) provides a concentrated, portable option for daily vitality support. Tinctures are ideal for individuals who travel frequently or prefer a quick, precise dose. For a broader look at energy-focused tinctures, our guide to herbal tinctures for energy and vitality covers formulation strategies.
The Ritual Element
At Sacred Plant Co, we encourage approaching preparation as intentional practice rather than mere consumption. The act of simmering a root decoction, watching the water darken, inhaling the rising steam, this is itself a form of nervous system regulation. Setting an intention, even a simple one like "I am building my reserves," transforms a mechanical task into a small act of self-care that primes the body for receptivity.
Vitality Herb Recipes for Daily Use
The most effective way to integrate vitality herbs into daily life is through simple, repeatable recipes that become part of your rhythm. Below are four formulas designed for different times of day and different needs.
1. Energizing Vitality Tea
Ingredients: 1 tsp dried Stinging Nettle, 1 tsp dried Ginseng (sliced thin), 1/2 tsp grated fresh Ginger.
Instructions: Combine Nettle and Ginger in a teapot or French press. Simmer the Ginseng slices separately in a small saucepan for 10 minutes, then pour the hot Ginseng decoction over the Nettle and Ginger. Steep for an additional 5 to 7 minutes, then strain. Drink in the morning for sustained, crash-free energy. The Ginger warms the digestive system, enhancing absorption of Nettle's minerals.
2. Stress-Recovery Adaptogen Smoothie
Ingredients: 1/2 tsp powdered Ashwagandha, 1 frozen banana, 1/2 cup almond milk, 1 tbsp raw honey.
Instructions: Blend all ingredients until smooth and creamy. The banana and honey mask Ashwagandha's earthy bitterness while providing quick-digesting carbohydrates. Enjoy as a mid-afternoon recovery drink, particularly on days with high mental demand. Consistent daily use over 2 to 4 weeks is when the adaptogenic effects become most noticeable.
3. Immune-Building Herbal Broth
Ingredients: 2 tbsp dried Astragalus Root, 1 tsp minced fresh Garlic, 3 slices of Ginger, 1/2 cup chopped seasonal vegetables.
Instructions: Simmer the Astragalus Root and Ginger slices in 4 cups of water for 20 to 25 minutes to create a medicinal broth base. Strain out the root pieces. Return the broth to the pot, add garlic and vegetables, and cook until tender. Season to taste. This is a traditional TCM approach to building Wei Qi (protective energy) and is especially valuable during seasonal transitions or recovery periods.
4. Stamina Tonic with Rhodiola
Ingredients: 1 tsp dried Rhodiola Rosea, 1 tsp raw honey, juice of 1/2 lemon.
Instructions: Steep Rhodiola in 8 oz of hot (not boiling) water for 10 minutes. Strain, then stir in honey and lemon juice. Drink 30 to 45 minutes before physical activity or demanding work sessions. Rhodiola's effects on perceived exertion and mental focus are most pronounced when taken acutely before effort, while its long-term adaptogenic benefits build with daily use over weeks.8
Dosage Guidelines for Vitality Herbs
General dosage ranges for vitality herbs depend on the form of preparation, the specific herb, and individual constitution, but established traditional and clinical ranges provide a reliable starting framework.
- Ashwagandha Root: 3-6 grams dried root daily as decoction, or 300-600mg standardized extract. Best taken in the evening or split into two doses.
- American Ginseng: 1-2 grams dried root as decoction, or 200-400mg standardized extract. Best taken in the morning. Cycle 5 days on, 2 days off for long-term use.
- Stinging Nettle Leaf: 1 ounce (approximately 28g) steeped overnight in 1 quart water for a full nutritive infusion, or 1-2 teaspoons for a standard tea. Can be used daily without cycling.
- Astragalus Root: 9-15 grams daily in decoction (TCM standard dose). Can be used long-term as a tonic. Best simmered 20-30 minutes.
- Ginger Root: 1-3 grams fresh or dried daily. Often added to other formulas as a synergist and circulatory catalyst.
- Ginkgo Biloba: 1-2 teaspoons dried leaf as tea, or 120-240mg standardized extract daily. Effects on circulation are typically noticed after 4-6 weeks.
- Eleuthero Root: 2-4 grams dried root as decoction or 300-400mg standardized extract. Cycle 6-8 weeks on, 1-2 weeks off.
Start with the lower end of any range and increase gradually. Individual response varies, and "more" is rarely "better" with adaptogenic herbs. Consistency over weeks matters far more than high single doses.
Safety Considerations and Contraindications
Vitality herbs have long histories of safe traditional use, but responsible herbalism requires understanding both contraindications (specific conditions where an herb should be avoided) and energetics (how an herb's warming or cooling nature affects different constitutions).
Important Safety Information
Contraindications:
- Ashwagandha should be avoided by individuals with hyperthyroidism or those taking thyroid medications, as it may stimulate thyroid hormone production. It belongs to the nightshade family, so those with nightshade sensitivities should use caution.
- Ginseng may interact with blood thinners (warfarin), diabetes medications, and MAO inhibitors. Those with hypertension should start with small doses and monitor blood pressure.
- Nettle may have mild diuretic effects and can interact with blood-thinning medications and lithium. Those with kidney disease should consult their provider.
- Astragalus should be avoided during acute infections or fever (per TCM guidelines, it is a tonic for building, not for clearing).
- Ginkgo Biloba should be discontinued at least 2 weeks before surgery due to potential blood-thinning effects. It may interact with anticoagulant and antiplatelet medications.
Energetic Considerations:
- Ginseng and Ginger are warming herbs. Individuals who tend to run hot (night sweats, feeling overheated, red complexion) may do better with cooling alternatives like American Ginseng or Nettle.
- Ashwagandha is gently warming and grounding. Those with Pitta-dominant constitutions in Ayurvedic terms may benefit from combining it with a cooling herb like Shatavari.
General Guidance: If you are pregnant, nursing, taking prescription medications, or managing a chronic health condition, consult a qualified healthcare provider before adding vitality herbs to your regimen. These herbs are powerful allies that work best within a holistic approach to wellness.
Our Commitment to Transparency: Lab Testing
Every batch of herbs we offer is subject to quality verification. We believe you have the right to know exactly what is in your herbs, from heavy metal screening to microbial testing. You can request the Certificate of Analysis for any product by lot number.
Request COA by Lot #Learn what lab reports actually tell you in our guide to reading a Certificate of Analysis.
Frequently Asked Questions About Vitality Herbs
What makes an herb a "vitality herb" versus a simple stimulant?
Vitality herbs nourish the body's energy-producing systems, including the adrenals, circulatory system, and mitochondria, rather than artificially spiking adrenaline or cortisol. Stimulants like caffeine borrow energy from the body's reserves and create dependency. Vitality herbs, particularly adaptogens, help the body generate and regulate its own energy more efficiently over time. The effects are cumulative and sustainable rather than immediate and depleting.
Which vitality herbs are best for all-day energy without a crash?
Ashwagandha, Eleuthero (Siberian Ginseng), and Rhodiola Rosea are the top choices for sustained, crash-free energy. These adaptogens modulate the HPA axis to optimize cortisol rhythms, meaning your body produces energy when you need it and allows recovery when you rest. Pairing any of these with mineral-dense Stinging Nettle ensures the raw nutritional cofactors for energy metabolism are also present.
Can I combine multiple vitality herbs safely?
Yes, combining complementary vitality herbs is a time-honored practice in both Ayurveda and TCM, and often produces better results than single-herb use. A classic combination pairs an adaptogen (like Ashwagandha) with a circulatory tonic (like Ginger) and a nutritive (like Nettle). Start with lower doses of each when combining, and introduce one new herb at a time so you can assess individual response. Avoid combining multiple strong stimulating herbs without guidance.
How long does it take for vitality herbs to start working?
Some herbs produce noticeable effects within hours, while others build their benefits over 2 to 6 weeks of consistent use. Ginseng and Rhodiola often produce perceptible mental clarity and reduced fatigue within the first few days. Ashwagandha's cortisol-modulating effects typically become clear after 2 to 4 weeks of daily use. Nettle's mineral replenishment can be felt within days as improved energy and reduced muscle tension, particularly in those who were mineral-deficient.
Are vitality herbs safe to take every day long-term?
Most vitality herbs have centuries of safe daily use in traditional medicine, though cycling or rotating herbs is considered best practice. Nutritive herbs like Nettle and Astragalus can generally be taken daily without interruption. Adaptogens like Ginseng and Rhodiola benefit from cycling (for example, 5 days on and 2 days off, or 6 weeks on and 1 week off). Always consult a healthcare provider if you are on medications or managing a chronic condition.
How does soil quality affect the potency of vitality herbs?
Soil biology directly determines the concentration of secondary metabolites, the compounds responsible for a plant's medicinal effects. Withanolides, ginsenosides, and other bioactive compounds are defense chemicals that plants produce in response to microbial interaction and environmental stress. Biologically dead, over-tilled soil produces plants with lower concentrations of these compounds. This is why regenerative practices, which build microbial diversity in the soil, are essential for producing truly potent herbs. Our Haney Score data demonstrates the measurable impact of this approach.
What is the best way to take vitality herbs for beginners?
Start with a single, versatile herb in a simple preparation method, and build from there. A daily Stinging Nettle infusion is one of the most accessible starting points because it is gentle, nutritive, and produces noticeable effects quickly. From there, you might add Ashwagandha in powdered form to an evening smoothie. Tinctures offer the simplest dosing for those who prefer convenience. Avoid the temptation to start with five herbs at once, as gradual introduction allows you to understand your body's individual response to each plant.
Reclaim Your Vitality, Rooted in Living Soil
When we source our herbs from thriving, biologically active ecosystems, we absorb the profound resilience of the earth itself.
True vitality is not something you extract from a pill or borrow from a stimulant. It is something you build, layer by layer, through nourishment that starts in the soil and ends in your body's own resilient chemistry. The herbs in this guide, Ashwagandha, Ginseng, Nettle, Astragalus, Ginger, Ginkgo, Eleuthero, have been trusted by healers across cultures and centuries because they work with the body rather than overriding it.
At Sacred Plant Co, our commitment is to ensure that the herbs reaching your hands carry the full expression of their phytochemical potential, grown in soil that is biologically alive and managed through regenerative principles that honor the plant's own intelligence. When you steep a Nettle infusion and the water turns deeply, almost impossibly green, or when you chew a Ginseng root and feel the bitterness bloom across your palate, you are tasting what real medicine is supposed to be.
Start with one herb. Build a daily practice. Let the plants teach you what your body has been asking for.
References
- Panossian, A., & Wikman, G. (2010). Effects of Adaptogens on the Central Nervous System and the Molecular Mechanisms Associated with Their Stress-Protective Activity. Pharmaceuticals, 3(1), 188-224. doi:10.3390/ph3010188
- Bensky, D., Clavey, S., & Stoger, E. (2004). Chinese Herbal Medicine: Materia Medica. 3rd ed. Eastland Press.
- Chandrasekhar, K., Kapoor, J., & Anishetty, S. (2012). A Prospective, Randomized Double-Blind, Placebo-Controlled Study of Safety and Efficacy of a High-Concentration Full-Spectrum Extract of Ashwagandha Root. Indian Journal of Psychological Medicine, 34(3), 255-262. doi:10.4103/0253-7176.106022
- Kim, J. H., et al. (2018). Pharmacological and Medical Applications of Panax Ginseng and Ginsenosides: A Review for Use in Cardiovascular Diseases. Journal of Ginseng Research, 42(3), 264-269. doi:10.1016/j.jgr.2017.10.004
- Kregiel, D., et al. (2018). Urtica spp.: Ordinary Plants with Extraordinary Properties. Molecules, 23(7), 1664. doi:10.3390/molecules23071664
- Block, K. I., & Mead, M. N. (2003). Immune System Effects of Echinacea, Ginseng, and Astragalus: A Review. Integrative Cancer Therapies, 2(3), 247-267. doi:10.1177/1534735403256419
- Diamond, B. J., & Bailey, M. R. (2013). Ginkgo biloba: Indications, Mechanisms, and Safety. Psychiatric Clinics of North America, 36(1), 73-83. doi:10.1016/j.psc.2012.12.006
- Ishaque, S., Shamseer, L., Bukutu, C., & Vohra, S. (2012). Rhodiola rosea for Physical and Mental Fatigue: A Systematic Review. BMC Complementary and Alternative Medicine, 12, 70. doi:10.1186/1472-6882-12-70

