Ashwagandha: Benefits, Dosage
& Side Effects
The adaptogenic herb with over 3,000 years of use in Ayurvedic medicine β now backed by modern clinical research.
What is Ashwagandha?
Ashwagandha (Withania somnifera), also known as "Indian ginseng" or "winter cherry," is one of the most important herbs in traditional Ayurvedic medicine. Classified as an adaptogen, it helps the body manage physical and mental stress more effectively.
The main active compounds are withanolides β a group of steroidal lactones responsible for most of its therapeutic effects. Withanolide concentration varies significantly between different extracts, and this makes a huge difference in efficacy.
Not all ashwagandha supplements are created equal. Simple root powder contains just 1-2% withanolides, while KSM-66 extract contains a minimum of 5% standardized withanolides β the exact concentration used in most clinical trials. Rootful Ashwagandha KSM-66 uses this exact premium extract.
Scientifically proven benefits
Ashwagandha is one of the most researched adaptogenic herbs in the world. Here are the benefits confirmed by modern scientific research:
Reduces stress & anxiety
Reduces cortisol levels (the stress hormone) by up to 27%. Effects typically appear after 6-8 weeks of consistent use.
Improves sleep quality
Studies show a 72% improvement in sleep quality among people with insomnia. Helps with faster sleep onset.
Increases muscle strength
Boosts muscle mass and recovery speed. Wankhede's study showed significant strength gains in bench press exercises.
Supports cognitive function
Improves memory, attention, and information processing speed. Proven neuroprotective effect.
Boosts energy & endurance
Enhances aerobic capacity (VOβmax) and physical endurance. Ideal for athletes and active individuals.
Balances hormones
In men: increases natural testosterone. In women: may balance thyroid hormones and reduce PMS symptoms.
π Key studies
64 adults with chronic stress took 300 mg KSM-66 twice daily for 60 days. Result: 27.9% reduction in serum cortisol and significant decreases in stress and anxiety scores vs. placebo.
β Indian J Psychol Med, 201280 participants (healthy + insomnia) took 600 mg/day root extract. Result: 72% improvement in sleep quality in the insomnia group, significantly reduced sleep onset latency.
β Cureus, 201957 young men took 300 mg KSM-66 twice daily for 8 weeks combined with resistance training. Result: significantly greater increases in muscle mass and strength, plus reduced body fat percentage vs. placebo.
β J Int Soc Sports Nutr, 2015Meta-analysis of 12 clinical studies: ashwagandha significantly improved VOβmax, muscle strength, and post-exercise recovery compared to placebo.
β Nutrients, 202150 healthy adults took 300 mg KSM-66 twice daily for 8 weeks. Result: significant improvements in immediate and general memory, processing speed, and attention.
β J Ethnopharmacol, 2017Ready to experience Ashwagandha?
Rootful Ashwagandha KSM-66 β premium extract with 5% withanolides, in delicious raspberry gummies.
πΏ Discover Ashwagandha KSM-66Why KSM-66 matters
KSM-66 is the world's most studied ashwagandha extract, produced through a patented "green chemistry" extraction process that took 14 years to develop. Here's why it's considered the gold standard:
- Full-spectrum: Extracts the complete range of withanolides from the root, preserving the plant's natural profile
- Standardized to min. 5% withanolides: HPLC-verified concentration, consistent from batch to batch
- 24+ human clinical studies: The largest number of clinical trials among all ashwagandha extracts
- Certified organic, non-GMO, gluten-free: Purity verified through third-party testing
- No chemical solvents or alcohol: Milk-based extraction process, per Ayurvedic tradition
When choosing an ashwagandha supplement, always check: (1) the extract type, (2) the withanolide percentage, and (3) whether the extract was used in clinical studies. Rootful Ashwagandha KSM-66 checks all these boxes.
Recommended dosage
The optimal dose depends on your goal. Here's a guide based on existing clinical studies:
| Goal | Daily dose | Recommended duration |
|---|---|---|
| π Stress & anxiety reduction | 600 mg/day | Minimum 6-8 weeks |
| π΄ Sleep improvement | 300-600 mg/day | Minimum 6 weeks |
| πͺ Strength & muscle mass | 600 mg/day | Minimum 8 weeks |
| π§ Cognitive function | 300-600 mg/day | Minimum 8 weeks |
| β‘ Energy & endurance | 300-600 mg/day | Minimum 8-12 weeks |
Morning β for energy and focus throughout the day. Evening β if your main goal is improving sleep. Ashwagandha can be taken with or without food, but taking it with food may reduce gastric discomfort in sensitive individuals.
For a complete sleep protocol, you can pair ashwagandha with Rootful Sleep & Recovery or Rootful Night for a synergistic effect.
Side effects & precautions
Ashwagandha is generally well-tolerated at recommended doses. Clinical studies report an excellent safety profile. However, like any supplement, there are a few things to keep in mind:
Possible side effects (rare, mild)
- Mild gastrointestinal discomfort (especially on an empty stomach)
- Drowsiness (especially at higher doses β which is why it's useful in the evening too)
- Mild headaches in the first few days (rare)
Pregnant or breastfeeding women β insufficient safety data available.
People with hyperthyroidism β ashwagandha may stimulate thyroid function.
People with autoimmune conditions β it may stimulate the immune system.
Before surgery β stop at least 2 weeks prior.
People taking sedatives, immunosuppressants, or thyroid medications β consult your doctor.
Always consult a healthcare professional before starting any new supplement, especially if you have pre-existing medical conditions or are taking medications.
Frequently asked questions
Most studies show significant results after 6-8 weeks of consistent daily use. Some people report improvements in sleep and stress levels within the first 2-3 weeks, but full effects build gradually. Patience and consistency are key!
Yes! Clinical studies have tested daily use for 8-12 weeks with excellent safety results. Some experts recommend cycling "8 weeks on, 2 weeks off," but there's no universal consensus. Listen to your body.
KSM-66 is an extract standardized to a minimum 5% withanolides, produced from roots only (not leaves), using a patented "green chemistry" extraction process. It has the most human clinical studies (24+) and is considered the gold standard. Other extracts can vary significantly in concentration and purity.
Indirectly, yes. By reducing cortisol (the hormone that promotes abdominal fat accumulation) and improving sleep quality, ashwagandha can support weight management goals. Choudhary's study (2017) also showed reduced emotional appetite scores in stressed individuals.
Absolutely! Ashwagandha pairs well with magnesium (for sleep), vitamin D (for immunity), and probiotics (for gut health). From Rootful, the combination with Greens & Superfoods is ideal for a complete vitality boost.
Yes! Studies show specific benefits for women: hormone balancing, PMS symptom reduction, improved libido, stress reduction, and thyroid function support. Exception: pregnancy and breastfeeding, when it's not recommended.
Start your Ashwagandha routine
Rootful's premium KSM-66 formula β natural raspberry gummies with no added sugar.
πΏ Order now βDiscover complementary products that work synergistically with Ashwagandha:
π Scientific references
- 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 J Psychol Med, 34(3), 255-262. doi:10.4103/0253-7176.106022
- Langade, D., Kanchi, S., Salve, J., et al. (2019). Efficacy and Safety of Ashwagandha Root Extract in Insomnia and Anxiety. Cureus, 11(9), e5797. doi:10.7759/cureus.5797
- Wankhede, S., Langade, D., Joshi, K., et al. (2015). Examining the effect of Withania somnifera supplementation on muscle strength and recovery. J Int Soc Sports Nutr, 12, 43. doi:10.1186/s12970-015-0104-9
- Bonilla, D.A., et al. (2021). Effects of Ashwagandha on Physical Performance: Systematic Review and Bayesian Meta-Analysis. Nutrients, 13(11), 4020. doi:10.3390/nu13114020
- Choudhary, D., Bhatt, S., & Joshi, S. (2017). Efficacy and Safety of Ashwagandha Root Extract on Cognitive Functions. J Ethnopharmacol, 207, 68-78. doi:10.1016/j.jep.2017.09.002
- Salve, J., et al. (2019). Adaptogenic and Anxiolytic Effects of Ashwagandha Root Extract in Healthy Adults. Cureus, 11(12), e6466. doi:10.7759/cureus.6466
- Lopresti, A.L., et al. (2019). An investigation into the stress-relieving and pharmacological actions of an ashwagandha extract. Medicine (Baltimore), 98(37), e17186. doi:10.1097/MD.0000000000017186
This article is for informational purposes only and does not replace professional medical advice. Consult a healthcare provider before starting any supplementation regimen.
Comments (0)
There are no comments for this article. Be the first one to leave a message!