Nutrition / Explainer
Adaptogens: What The Evidence Actually Says
21 May 2026
"Adaptogen" is doing a lot of work on UK labels right now. The word covers herbs with serious clinical research, herbs with promising early studies, and herbs that are mostly riding along. Here's a plain sorting.
The stronger end
Ashwagandha, specifically the KSM-66 root extract, has multiple clinical trials linking it to feeling less stressed, typically at 300 to 600mg a day. The form matters: the trials used specific extracts, not generic powder.
Rhodiola rosea has reasonable evidence around fatigue, in studies typically using 200 to 600mg of a standardised extract. At the tiny doses it often appears in drink blends, it's mostly a word on a label.
The middle
Lion's Mane and cordyceps sit here: real studies, mostly around 1000mg a day of extract, with results that are promising rather than settled.
The riding-along end
Maca is pleasant, traditional, and studied mostly for mood and energy at 1.5 to 3g a day. The 50 to 250mg sprinkles common in UK blends are nowhere near that.
Turmeric, ginger, cinnamon and other kitchen spices in drink blends are flavour with a health halo at the amounts used.
The pattern to notice: for every adaptogen, the question is never "is it in there?" It's "how much, and in what form?" The distance between the study dose and the label dose is the distance between a supplement and a story.
None of this is medical advice, and adaptogens can interact with medication. If you're on anything long-term, ask a pharmacist before adding them.
This article is general information, not medical advice. If symptoms are severe, persistent, or worrying you, speak to your GP or a pharmacist.