Ashwagandha

What is ashwagandha?

Ashwagandha (Withania somnifera) is a plant used traditionally in South Asia. Supplements usually contain root powder, root extract or root-and-leaf extract. Concentrated extracts can be standardised for naturally occurring compounds called withanolides, a group of steroidal lactones.

What might ashwagandha help with?

Some short-term studies suggest that particular ashwagandha extracts may help with perceived stress and sleep. Findings depend on the extract and study population; the name “ashwagandha” alone does not identify a clinically equivalent product.

Exercise-related outcomes have also been investigated, but evidence is not sufficient to promise broad benefits for every preparation. It is more useful to match an extract to relevant human research than to choose the largest milligram number.

What does the research say about stress, cortisol and sleep?

Does lower cortisol mean better health?

Not necessarily. Cortisol is a normal hormone, and a study finding does not show that everyone should try to lower it. The trial does not establish treatment for a hormonal disorder, nor prove that a different extract will produce the same result.

Is ashwagandha safe to take every day?

Short-term tolerability is better studied than long-term safety. NIH sources describe use for up to about three months, but this is not a guaranteed safe period for every person or preparation. Continuous use over many months or years remains insufficiently understood.

Do you need to cycle it or take breaks?

There is no established evidence-based cycling schedule that makes long-term use safe. A planned week off does not resolve uncertainty about the extract, dose or individual risk. Reassess whether it is helping rather than treating it as an indefinite daily essential.

Side effects and who should avoid it

Possible effects include stomach upset, diarrhoea and drowsiness. Rare liver injury has been reported. Avoid during pregnancy and breastfeeding. Thyroid or autoimmune disease, upcoming surgery and hormone-sensitive prostate cancer require particular caution; seek professional advice rather than self-selecting a product.

Interactions may involve thyroid hormones, sedatives, anticonvulsants, immunosuppressants, and diabetes or blood-pressure medicines. Stop use and seek medical advice for yellow skin or eyes, dark urine or marked unexplained nausea or fatigue, especially if you have liver disease.

What exactly is in the capsule?

KSM-66 vs Sensoril: what is the difference?

KSM-66 is a root-only extract; Sensoril combines root and leaf. They also differ in standardisation and the amounts used in studies. Neither name alone makes a finished supplement the better choice.

Is 10% twice as strong as 5%?

It is not a reliable clinical comparison. Labels can refer to different groups of compounds and analytical methods. Even when a percentage helps calculate a declared constituent amount, it does not establish twice the benefit, or that a smaller capsule can replace a larger one.

What about Shoden?

Shoden® is another concentrated root-and-leaf extract with its own standardisation and research. Keep it separate when comparing formulations; do not convert between branded extracts using milligrams alone.

For a root-only preference, identify products that actually name the root extract. For a Sensoril product, confirm the branded ingredient and daily serving. Check added actives too: black pepper, L-theanine or other ingredients make the whole formula different.

What should you compare?