Ashwagandha Benefits

By Dietitian Name Published January 28, 2026

Ashwagandha (Withania somnifera), also called Indian ginseng or winter cherry, comes from a small evergreen shrub native to India, Africa and parts of the Middle East. For more than 3,000 years, practitioners of Ayurvedic medicine—a traditional Indian healing system—have used all parts of the plant, especially its roots, to treat ailments from fatigue to memory loss and respiratory problems.

In Sanskrit, Ashwagandha translates to “smell of the horse,” symbolizing its legendary ability to provide the strength and vitality of a horse. Modern supplement makers often use the root extract in capsules, tablets, powders and other forms. Proponents use ashwagandha for a long list of health benefits, including pain relief, better sleep, reduced anxiety, enhanced athletic performance and increased fertility.

What Is Ashwagandha?

Ashwagandha is classified as an adaptogen, a substance thought to boost the body’s resilience to stress. Researchers are actively exploring ashwagandha’s effects on stress, anxiety and sleep, as well as its potential benefits for athletic performance, fertility and cognition.

7 Potential Health Benefits of Ashwagandha

Though research on ashwagandha is limited, preliminary studies suggest it may offer some health benefits. Here are seven emerging areas of research:

1. May Reduce Stress and Anxiety

Of ashwagandha’s many benefits, research most strongly supports its use for reducing stress and anxiety. Ashwagandha appears to reduce activity in the hypothalamic-pituitary-adrenal (HPA) axis, the pathway that regulates your body’s response to stress.

In a small study with 58 participants, those who took 250 or 600 mg of ashwagandha extract for 8 weeks experienced significantly lower cortisol levels and perceived stress compared to a placebo group. Another study of 130 adults found ashwagandha root extract significantly reduced stress and anxiety symptoms after 90 days.

Meta-analyses confirm ashwagandha’s anxiolytic effects, with doses of 300-600 mg daily showing consistent benefits for stress reduction across multiple randomized controlled trials.

2. May Improve Sleep

Ashwagandha shows promise for enhancing sleep quality, particularly in people with insomnia or stress-related sleep disturbances. A review of five clinical trials found ashwagandha supplementation improved sleep efficiency, total sleep time and reduced sleep latency.

In one study, adults taking 600 mg of ashwagandha root extract daily for 8 weeks reported better sleep quality and felt more rested during the day compared to placebo. Researchers believe ashwagandha’s GABA-mimetic activity (enhancing inhibitory neurotransmission) contributes to its sleep-promoting effects.

3. May Boost Athletic Performance

Emerging evidence suggests ashwagandha enhances exercise performance and recovery. A meta-analysis found ashwagandha significantly improved VO2 max—a measure of cardiorespiratory fitness—in healthy adults and athletes.

In resistance training studies, ashwagandha supplementation (300-500 mg daily) increased muscle strength, size and recovery markers compared to placebo. One 8-week study showed greater gains in bench press strength, leg extension strength and muscle girth in the ashwagandha group.

Ashwagandha also improved time to exhaustion, anaerobic capacity and reduced exercise-induced muscle damage, making it a promising ergogenic aid.

4. May Increase Testosterone and Fertility in Men

Several studies suggest ashwagandha boosts testosterone levels and improves male fertility parameters. In one study, men taking 675 mg ashwagandha daily for 90 days experienced a 15% greater increase in testosterone and significant improvements in sperm count, semen volume and motility compared to placebo.

Ashwagandha’s adaptogenic properties may enhance testicular function and reduce oxidative stress on sperm. These fertility benefits appear most pronounced in men with low sperm count or stress-related infertility.

5. May Reduce Blood Sugar Levels

Limited evidence indicates ashwagandha may help manage blood sugar in people with diabetes or prediabetes. A review of 24 studies, including five clinical trials, found ashwagandha significantly reduced fasting blood sugar, HbA1c and insulin resistance.

Compounds like withaferin A appear to enhance insulin secretion and glucose uptake by cells. However, more large-scale human trials are needed to confirm these antidiabetic effects.

6. May Fight Inflammation

Ashwagandha demonstrates potent anti-inflammatory activity. Animal studies show withaferin A reduces inflammatory markers like IL-10, TNF-alpha and C-reactive protein.

Human studies confirm ashwagandha lowers CRP levels—a key marker of systemic inflammation—and may benefit conditions like arthritis. Its antioxidant properties also combat oxidative stress that fuels chronic inflammation.

7. May Improve Brain Function and Memory

Preliminary research suggests ashwagandha enhances cognitive performance. A study of 50 adults found 600 mg daily for 8 weeks improved immediate memory, executive function, attention and information processing speed.

Ashwagandha’s neuroprotective effects may stem from reduced neuroinflammation, enhanced antioxidant defenses and improved synaptic plasticity. Animal studies show benefits for neurodegenerative conditions.

How to Take Ashwagandha

• Dosage: Most studies use 300-600 mg of root extract standardized to 5% withanolides daily
• Timing: Split doses with meals to improve absorption and reduce stomach upset
• Forms: Capsules, powder, gummies or tea. Look for KSM-66 or Sensoril standardized extracts
• Duration: 8-12 weeks typical in studies. Cycle use and consult healthcare provider for long-term use

Side Effects and Precautions

Ashwagandha appears safe for most people at recommended doses. Common side effects include:

• Stomach upset, diarrhea or nausea
• Drowsiness (especially at higher doses)
• Lower blood pressure or blood sugar

Precautions:

• Pregnant/nursing: Avoid due to insufficient safety data
• Autoimmune disease: May increase immune activity
• Thyroid conditions: May affect thyroid hormone levels
• Surgery: Stop 2 weeks before due to sedative effects
• Medications: May interact with sedatives, thyroid drugs, immunosuppressants, blood pressure or diabetes medications

Always consult your healthcare provider before starting ashwagandha, especially if you take medications or have health conditions.

Frequently Asked Questions (FAQs)

What are the benefits of taking ashwagandha?

The most evidence-based benefits include stress and anxiety reduction, improved sleep quality, enhanced athletic performance and potential testosterone/fertility support in men.

Can you take ashwagandha every day?

Yes, studies typically use daily dosing for 8-12 weeks. Long-term safety beyond 3 months requires more research. Cycle use and monitor for side effects.

Who should not take ashwagandha?

Avoid if pregnant, breastfeeding, have autoimmune disease, hyperthyroidism or upcoming surgery. Consult your doctor if taking medications.

Does ashwagandha increase testosterone?

Yes, several studies show ashwagandha increases testosterone levels (10-22%) and improves sperm parameters in men, particularly those with infertility.

How long does it take for ashwagandha to work?

Stress reduction may occur within 2-4 weeks. Sleep and athletic benefits typically appear after 8 weeks of consistent use.

Bottom Line

Ashwagandha shows promising benefits for stress reduction, sleep improvement and athletic performance backed by multiple clinical trials. While generally safe, consult your healthcare provider before use, especially with medications or health conditions. Choose high-quality, standardized root extracts for best results.

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Author

medha deb

 

Medha Deb is an editor with a master's degree in Applied Linguistics from the University of Hyderabad. She believes that her qualification has helped her develop a deep understanding of language and its application in various contexts.

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