Ashwagandha and 'Cortisol Belly': What the Trials Show — and What They Don't

It is late, the house is finally quiet, and you are on your phone again. A video promised that one root could calm your stress and slim your middle, so you typed "ashwagandha cortisol belly" into Google and landed here. You want to know whether any of it is real.

This article covers what "cortisol belly" means to a doctor, what three layers of clinical research on ashwagandha show, what those trials never measured, and what you can realistically do about a waistline that changed after 40.

What "cortisol belly" means, and what doctors call it

"Cortisol belly" is not a diagnosis. According to Dr. Scott Isaacs, president of the American Association of Clinical Endocrinology, it is "a popular, nonmedical term used on social media to describe excess belly fat." The fat physicians track is visceral fat, the deep layer around your organs, not the softer fat you can pinch.

Isaacs adds that cortisol is only part of the picture; diet, sleep, activity, other hormones and medical conditions all matter. Cleveland Clinic lists cortisol as one hormone that nudges the body to store visceral fat, and uses a simple screen: a waist of 35 inches or more in a woman signals higher risk.

Why the weight moved to your middle after 40

If your hips and thighs flattened while your waist thickened, that is not your imagination. In a four-year study of 156 women, 103 white and 53 Black, every woman gained fat under the skin as she aged, but only those who went through menopause during the study had a significant rise in visceral fat. Their estradiol fell and their fat oxidation dropped by about a third.

Falling estrogen changes where fat is stored, the body uses a little less energy at rest, and activity dips in the years before menopause. Stress and cortisol sit on top of that; they do not replace it.

What the research says about ashwagandha cortisol belly claims

There are three layers of evidence, each answering a different question. Marketing blurs them into one.

Layer 1: Does ashwagandha lower cortisol? In the blood, yes

The broadest evidence is a 2025 systematic review and meta-analysis in Nutrition and Health that pooled randomized controlled trials lasting at least two weeks at 250 mg a day or more. Across seven trials measuring cortisol, ashwagandha lowered it by an average of 1.16 micrograms per deciliter compared with placebo, a statistically significant difference.

Here is the part the ads leave out. Across six trials that also scored perceived stress, the pooled difference was not statistically significant. The author called it a disconnect between the lab value and lived experience and asked for longer trials in more diverse populations.

Layer 2: Does it help in perimenopause? One trial says yes, for symptoms

The one randomized trial in this life stage is an eight-week, double-blind study of 100 perimenopausal women published in 2021. They took 300 mg of an ashwagandha root extract twice a day or a placebo; 91 finished. The ashwagandha group scored significantly lower on the Menopause Rating Scale and a menopause quality-of-life questionnaire, with higher estradiol and lower FSH and LH. Testosterone did not change.

That matters for hot flashes, mood and sleep. But nobody was weighed and no waist was measured.

Layer 3: The "weight" trial, and why it is thinner than it looks

Only one randomized trial has looked at body weight directly: a 2017 study of 52 adults under chronic stress, again at 300 mg twice a day for eight weeks. Body weight fell 3.03 percent with ashwagandha versus 1.46 percent with placebo, BMI fell 2.93 versus 1.40 percent, and serum cortisol dropped about 22 percent versus about 8.

Read the fine print. Weight and BMI were secondary outcomes; the trial was built to measure stress and cravings. It did not measure waist, visceral fat or body composition, it was small, and the extract came from its manufacturer. It is a signal, not a verdict.

What the ashwagandha cortisol belly trials did not measure

Line the studies up and the gaps are as telling as the results.

• Visceral fat itself. None of the three used a scan or even a tape measure at the waist.
• Time. The trials ran eight weeks. The National Center for Complementary and Integrative Health notes that ashwagandha appears safe for up to three months, with too little data on longer use.
• How you feel. The pooled cortisol drop did not translate into a significant change in perceived stress.
• Women like you. None set out to study women after menopause or women regaining weight after stopping a GLP-1 medication.

So the honest answer to "does ashwagandha reduce cortisol belly" is: it lowers a stress hormone in the blood, it eased symptoms in one perimenopause trial, and one small trial logged modest weight change as a side finding. Whether any of that reaches the fat under your waistband is a question the trials did not ask.

Ashwagandha for women over 40: dose, timing and how long it takes

How much did the trials use?

Both trials used 300 mg of a standardized root extract twice a day, 600 mg in total. Those are single-ingredient research doses, and a multi-herbal product usually carries less.

A liquid maca, beet root and ashwagandha blend like ADIRA VitalDrops, for example, provides 80 mg of a 10:1 ashwagandha root extract per morning dropper alongside fenugreek. That is a daily botanical formula, not a copy of the 600 mg trial protocol.

Best time to take ashwagandha for cortisol

The two trials above split the dose between morning and evening and neither compared times of day, so they cannot name a best time. NCCIH notes some preparations have shown effects on insomnia, which is why some women prefer it at night.

How long does ashwagandha take to work for cortisol?

The trials that found a cortisol change ran eight weeks. If you and your provider decide to try it, give it eight weeks and keep a simple log:

• Your waist at the navel, measured the same morning each week
• Nights you slept through, out of seven
• A one-to-ten stress rating each evening

Ashwagandha side effects, liver safety and who should skip it

Two federal sources deserve a careful read. NCCIH says that, while rare, a number of cases have linked liver injury to ashwagandha supplements, and that it should be avoided in pregnancy and breastfeeding, before surgery, and by people with autoimmune or thyroid disorders.

The NIH LiverTox database, updated in December 2024, describes the reported injuries as typically appearing two to twelve weeks after starting, usually with jaundice and itching, and resolving within one to four months of stopping in most cases. It notes rare severe cases in people who already had cirrhosis.

• Skip it if you are pregnant or nursing, or have surgery scheduled.
• Ask first if you have a thyroid, autoimmune or liver condition.
• Stop and call your doctor if you notice itching, dark urine or yellowing of the skin or eyes.

Talk to your healthcare provider before starting any supplement, especially if you are pregnant, nursing, taking medication or managing a condition.

What this means for you: an eight-week plan that matches the evidence

Ashwagandha, at best, addresses one input. The research points to levers that move visceral fat more directly.

1. Measure, do not guess. Tape your bare waist at the navel, relaxed, and write it down. Cleveland Clinic's line for women is 35 inches.
2. Protect your sleep. Cleveland Clinic lists quality sleep among its strategies for visceral fat. A fixed bedtime is a small change with a long reach.
3. Move 30 minutes a day, five days a week. That is Cleveland Clinic's target; walking counts. Add two short strength sessions a week to hold on to muscle.
4. Eat in a pattern, not a diet. Cleveland Clinic points to Mediterranean and DASH eating: vegetables, beans, fish, olive oil, less added sugar and alcohol. Sunday dinner fits.
5. Lower the load you can lower. Stress reduction is on the list too: a morning walk with a friend, prayer, or saying no to one obligation this month.
6. Decide about ashwagandha with your provider, then keep it simple. Some women prefer a once-a-day liquid dropper stirred into coffee to another bottle of capsules.
7. Re-measure at eight weeks. Keep what helped, drop what did not.

FAQ

Does ashwagandha reduce cortisol belly?

Not in any trial that measured it. Ashwagandha lowered blood cortisol by about 1.16 micrograms per deciliter in a 2025 meta-analysis, and one small eight-week trial saw weight fall about 3 percent versus 1.5 percent on placebo. No trial has measured visceral fat or waist size, so the "belly" claim is untested.

What is the best time to take ashwagandha for cortisol?

The trials that produced the cortisol data split 600 mg into morning and evening doses without comparing times of day. NCCIH notes some preparations have shown effects on insomnia, which is why some women take it at night. Consistency matters more than the clock.

How long does ashwagandha take to work for cortisol?

The randomized trials that found a cortisol change ran eight weeks, and the meta-analysis included studies as short as two. Give it eight weeks with a written log of waist, sleep and stress before you judge. NCCIH considers use of up to three months reasonably safe, with little data beyond that.

Is ashwagandha bad for your liver?

For most people, no, but the risk is not zero. NCCIH and NIH LiverTox document rare cases of liver injury, typically appearing two to twelve weeks after starting and usually resolving after stopping. Watch for itching, dark urine or yellowing eyes, and avoid it if you have liver disease or are pregnant.

The bottom line

Ashwagandha does one thing consistently in trials: it lowers cortisol in the blood. One perimenopause study also saw symptom relief and hormone shifts; one small stress trial saw weight dip modestly as a secondary finding. No trial has measured the visceral fat that "cortisol belly" describes, so any promise about your waistline is an extrapolation, not a result. The levers that reliably move midlife belly fat are sleep, movement, strength work and eating pattern. If you add ashwagandha, add it with your provider's blessing, for eight weeks, with a tape measure and an honest log.

Sources

1. Dual impact of Ashwagandha: Significant cortisol reduction but no effects on perceived stress, a systematic review and meta-analysis (Nutrition and Health, 2025) — pubmed.ncbi.nlm.nih.gov
2. Effect of an ashwagandha root extract on climacteric symptoms in women during perimenopause: a randomized, double-blind, placebo-controlled study (Journal of Obstetrics and Gynaecology Research, 2021) — pubmed.ncbi.nlm.nih.gov
3. Body weight management in adults under chronic stress through treatment with ashwagandha root extract: a double-blind, randomized, placebo-controlled trial (2017) — pmc.ncbi.nlm.nih.gov
4. Increased visceral fat and decreased energy expenditure during the menopausal transition (International Journal of Obesity, 2008) — pubmed.ncbi.nlm.nih.gov
5. Ashwagandha: Usefulness and Safety — nccih.nih.gov
6. Ashwagandha, LiverTox: Clinical and Research Information on Drug-Induced Liver Injury — ncbi.nlm.nih.gov
7. What Is Cortisol Belly? How Stress Leads to Abdominal Fat, and How to Reduce It (Everyday Health, via AACE) — aace.com
8. Visceral Fat: What It Is and How It Affects You — my.clevelandclinic.org

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