Ashwagandha: cost per standardised dose

Because most modern ashwagandha trials use a standardised root extract dosed around 300 to 600 mg a day, with KSM-66 and Sensoril the best-known standardised extracts. We price per 600 mg, the common upper trial dose, so products compare like for like. A product quoting a large "root powder" figure is not the same thing as a standardised extract, and the milligrams are not comparable.

No, and this is the most common label trap. Cheap products may list a high milligram figure of raw root powder, while the trial evidence uses a concentrated, standardised extract at a fraction of that weight. Enter the standardised extract amount from the label; if a product only gives a raw powder figure, you cannot compare it on trial-relevant terms, which is itself worth knowing.

The regulator-grade answer: there are zero EFSA-authorised health claims for ashwagandha, so any marketing about stress, sleep or energy goes beyond what UK advertising rules permit. Some short-term trials report effects, but no claim has passed the EFSA evidence bar. This calculator only tells you the honest price; whether to take it at all is a conversation for your GP or pharmacist.

Ashwagandha is generally regarded as well tolerated short term in healthy adults, but it is a herbal supplement, rare cases of liver injury have been reported, and it can interact with thyroid, sedative and immune medicines. It is not advised in pregnancy. Speak to your GP or pharmacist before starting, especially if you take regular medication. Information only, not medical advice.