How Long Does Lion's Mane Take to Work? What the Research Says

Last reviewed: April 14, 2026 · Reviewed by the YourHealthier Science Team · Editorial Policy

Ashwagandha (Withania somnifera) is having a moment — and unlike most supplement trends, this one has a research base deep enough to survive scrutiny. A 2025 meta-analysis of 15 randomized controlled trials confirmed that ashwagandha supplementation significantly reduces cortisol, stress, and anxiety in adults, with effects reaching statistical significance at 8 weeks.^[1] That's 873 participants across controlled trials — not testimonials, not animal studies.

The compound responsible for most of the clinical effects is a class of steroidal lactones called withanolides, concentrated in the root. Different ashwagandha products extract and standardize these differently. Our Ashwagandha Plus uses KSM-66® — the most clinically-studied extract, standardized to 5% withanolides — at 600 mg per serving, which is the exact dose used in the landmark Chandrasekhar 2012 cortisol trial.^[2]

This guide covers what each benefit claim is actually based on, where the evidence is strong versus preliminary, and what our product does and doesn't contain.

The seven areas with human clinical evidence

1. Stress and cortisol reduction

This is ashwagandha's strongest evidence domain. Chandrasekhar et al. 2012 showed a 27.9% reduction in serum cortisol over 60 days with KSM-66® 600 mg/day.^[2] Salve et al. 2019 confirmed dose-dependent effects — 125 mg, 300 mg, and 600 mg all reduced cortisol, with 600 mg producing the largest effect.^[3] A 2025 meta-analysis of 15 RCTs (873 adults) confirmed statistically significant cortisol reduction at 8 weeks.^[1]

Detailed breakdown: Ashwagandha and Cortisol.

2. Sleep quality

Langade et al. 2019 randomized 80 adults to ashwagandha 600 mg/day or placebo for 8 weeks. Significant improvements in sleep onset latency, sleep efficiency, and total sleep time — in both healthy volunteers and insomniac participants.^[4] The mechanism links to cortisol reduction: lower evening cortisol → better sleep architecture.

More detail: Ashwagandha for Sleep. For complementary sleep support: Magnesium Glycinate for Sleep.

3. Physical performance and strength

Wankhede et al. 2015 tested KSM-66® 600 mg/day in 57 young men doing resistance training for 8 weeks. The ashwagandha group gained significantly more muscle strength (bench press and leg extension), more muscle size (arm and chest), and greater body fat reduction than placebo.^[5] Testosterone increased, and exercise-induced muscle damage decreased.

4. Anxiety

Multiple trials show significant anxiety reduction. The 2025 meta-analysis confirmed significant HAM-A (Hamilton Anxiety Rating Scale) improvement at 8 weeks across 15 studies.^[1] Ashwagandha's anxiolytic effect appears to involve GABAergic modulation — it enhances the brain's primary calming neurotransmitter system without the sedation or dependency risk of pharmaceutical anxiolytics.

5. Cognitive function

Some trials show improvements in memory, attention, and information processing. Choudhary et al. 2017 found that 600 mg/day of ashwagandha root extract for 8 weeks improved immediate and general memory, attention, and information processing speed compared to placebo.^[6] The cognitive effects are likely downstream of cortisol reduction — chronic cortisol elevation impairs hippocampal function.

6. Thyroid function

Limited evidence suggests ashwagandha may support thyroid hormone production. Sharma et al. 2018 showed that 600 mg/day of ashwagandha root extract for 8 weeks significantly increased T3 and T4 levels in subclinical hypothyroid patients.^[7] This is a benefit for some and a risk for others — people with hyperthyroidism or Graves' disease should avoid ashwagandha.

7. Male reproductive health

Several trials show improved testosterone levels and sperm quality. The Wankhede 2015 trial showed increased testosterone. Ambiye et al. 2013 showed significant improvements in sperm count, motility, and volume with KSM-66® 675 mg/day for 90 days.^[8] Effects on female hormonal health are less studied.

Our product: full specification

Our Ashwagandha Plus is an 8-ingredient formula:

• KSM-66® Ashwagandha Root Extract (5% withanolides): 600 mg — the clinical trial dose
• L-Arginine: 300 mg — nitric oxide precursor supporting circulation
• Maca Root Powder: 150 mg — traditional use for energy and hormonal balance
• Panax Ginseng Powder: 100 mg — adaptogen with its own clinical base
• Shatavari Powder: 50 mg — Ayurvedic rejuvenative herb
• Vitamin D3: 20 mcg (100% DV)
• Vitamin B6: 2.5 mg (147% DV)
• Vitamin B12 (Methylcobalamin): 25 mcg (1,042% DV)
• Capsule: HPMC (vegetable capsule)

Honest about the supporting ingredients: The KSM-66® at 600 mg is at the exact clinical trial dose. The supporting ingredients (L-Arginine, Maca, Ginseng, Shatavari) are at lower doses than their own individual clinical trial protocols would use — they're included as complementary support, not at standalone therapeutic levels. If you specifically want clinical-dose Maca or Ginseng, you'd need a dedicated single-ingredient product. The vitamins (D3, B6, B12) are at meaningful supplemental levels and support energy metabolism and nervous system function.

How to take it

Dose: 2 capsules daily. Timing: Evening for stress/sleep, morning for energy/performance. Duration: 4–8 weeks minimum to evaluate. With food for optimal absorption of fat-soluble withanolides and D3.

For timing specifics: Best Time to Take Ashwagandha.

Who should not take Ashwagandha

• People with autoimmune thyroid conditions (may stimulate thyroid hormone production)
• People on thyroid medication, sedatives, or immunosuppressants
• Pregnant or breastfeeding women (potential abortifacient effects in animal studies)
• People scheduled for surgery within 2 weeks

Related reading

• Ashwagandha and Cortisol: The Science Behind Stress Relief
• How KSM-66® Works for Stress
• Ashwagandha for Sleep
• Best Time to Take Ashwagandha
• Ashwagandha vs. Rhodiola
• Magnesium Glycinate for Sleep
• Berberine Benefits
• Lion's Mane Benefits

References

1. Alhassoon NM, et al. Effects of Ashwagandha supplements on cortisol, stress, and anxiety levels in adults: a systematic review and meta-analysis. BJPsych Open. 2025;11(S1). PMC
2. Chandrasekhar K, et al. A prospective, randomized double-blind, placebo-controlled study of a high-concentration full-spectrum extract of Ashwagandha root. Indian J Psychol Med. 2012;34(3):255–262. PubMed
3. Salve J, et al. Adaptogenic and anxiolytic effects of Ashwagandha root extract. Cureus. 2019;11(12):e6466. PubMed
4. Langade D, et al. Efficacy and safety of Ashwagandha root extract in insomnia and anxiety. Cureus. 2019;11(9):e5797. PubMed
5. Wankhede S, et al. Examining the effect of Withania somnifera supplementation on muscle strength and recovery. JISSN. 2015;12:43. PubMed
6. Choudhary D, et al. Efficacy and safety of Ashwagandha root extract in improving memory and cognitive functions. J Dietary Suppl. 2017;14(6):599–612. PubMed
7. Sharma AK, et al. Efficacy and safety of Ashwagandha root extract in subclinical hypothyroid patients. J Altern Complement Med. 2018;24(3):243–248. PubMed
8. Ambiye VR, et al. Clinical evaluation of the spermatogenic activity of the root extract of Ashwagandha (KSM-66). Evidence-Based Complement Altern Med. 2013;2013:571420. PubMed

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Disclosure: YourHealthier manufactures and sells the Ashwagandha supplement discussed in this article. Research on KSM-66® does not constitute claims about any specific product. We earn revenue from product sales linked in this article.

*These statements have not been evaluated by the FDA. This product is not intended to diagnose, treat, cure, or prevent any disease.

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