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What Is an Adaptogen?

by Dr. Miron in News

Reviewed and updated: 25 July 2026

What is an adaptogen? An honest explainer

An adaptogen is a traditional grouping of plants, such as ashwagandha, rhodiola and ginseng, that people have long reached for during demanding, tiring periods, and that share deep roots in traditions like Ayurveda and traditional Chinese medicine. The word itself is a research-era label used to group herbs associated with resilience and vitality. In this guide I will walk you through where the idea comes from, the heritage behind the best-known plants, what the modern research actually shows (honestly, including where it is thin), and how to judge an adaptogen supplement on the label.

Pure Vitamins KSM-66 Ashwagandha adaptogen supplement with L-Theanine and Vitamin B6

TL;DR

  • What it is: a traditional grouping of plants linked to stress resilience and vitality, including ashwagandha, rhodiola, Panax ginseng and eleuthero.
  • Who it is for: people exploring botanical supplements who want to understand the term rather than the hype.
  • Key idea: adaptogen is a heritage and research classification, and the modern human evidence is genuinely modest and mixed, so it is worth being honest about.
  • How to judge one: look at which plant, which part, the extract strength and standardisation, and overall quality.

Where the word comes from

The term adaptogen was coined by Soviet scientists in the mid-20th century to describe plants thought to help the body adapt to stressors. According to PubMed, the concept is defined pharmacologically as a class of stress-response modifiers that increase an organism's non-specific resistance to stress and its ability to adapt (Panossian, Annals of the New York Academy of Sciences, https://doi.org/10.1111/nyas.13399). It began as a proposed research category rather than a single, universally agreed definition, which is worth keeping in mind whenever you see the word on a label.

Which plants are usually called adaptogens?

The plants most often grouped under this heading include ashwagandha (Withania somnifera), rhodiola (Rhodiola rosea), Panax ginseng, eleuthero (sometimes called Siberian ginseng), holy basil (tulsi) and a handful of others. What they share is a long history of traditional use in systems such as Ayurveda and traditional Chinese medicine, where they were long valued for supporting vitality and helping people feel steady through demanding times. Rhodiola, for instance, has been reached for across the cold, high latitudes of Scandinavia and Siberia for generations, while ginseng is a cornerstone of Chinese wellness going back centuries.

The traditional-use heritage

Ashwagandha is the headline example. According to PubMed, ashwagandha (also called Indian ginseng) has been used in Indian systems of medicine for around 3,000 years and is classed among adaptogenic plants, with withanolides such as withaferin A among its characteristic constituents (Mandlik Ingawale and Namdeo, Journal of Dietary Supplements, https://doi.org/10.1080/19390211.2020.1741484). In Ayurveda it has traditionally been used to help the body feel calm, grounded and restored, which is a big part of why it remains so popular today. If you are weighing up ashwagandha specifically, our guide on root-only versus full-spectrum ashwagandha explains how the extracts differ.

KSM-66 Ashwagandha supplement with L-Theanine and Vitamin B6 by Pure Vitamins UK

What the research actually shows

Modern human research on adaptogens is genuinely interesting but modest and mixed, and honesty means saying so plainly. According to PubMed, a 30-day double-blind randomised trial in 60 healthy young adults examined a full-spectrum ashwagandha root extract and reported a difference in self-reported sleep and food cravings, but no statistically significant change in perceived stress over that short window, with the authors suggesting longer use might be needed (O'Connor and colleagues, Journal of Medicinal Food, https://doi.org/10.1089/jmf.2022.0040). The honest reading is that some small studies are encouraging, others are null, and this remains an evolving research story rather than settled fact. What I would not do is take one flattering study and turn it into a promise.

Pure Vitamins Ashwagandha KSM-66 capsules with L-Theanine and Vitamin B6

Forms and what to look for

  • Which plant and part: for ashwagandha, root extracts are the most studied. Check the plant part as well as the species.
  • Standardisation: a good extract states the level of marker compounds, such as withanolides for ashwagandha. We explain this in what standardised to 5% withanolides means.
  • Named extracts: branded, standardised extracts such as KSM-66 are well characterised in research, which we cover in what is KSM-66 ashwagandha.
  • Transparency: the amount of extract should be clearly stated, not hidden inside a proprietary blend.

A few cautions worth knowing

Adaptogenic botanicals are generally well tolerated by healthy adults, but they are not for everyone. Ashwagandha is usually advised against in pregnancy and breastfeeding, and people with thyroid conditions, autoimmune conditions, or those taking sedatives, thyroid medication or immunosuppressants should take medical advice first, as botanicals can interact with medicines. It is also sensible to pause before planned surgery. If you take any prescription medication or have a health condition, have a quick word with your GP or pharmacist before starting an adaptogen. For timing tips, see when to take ashwagandha.

How our adaptogen range is formulated

Our headline adaptogen is Ashwagandha, built around KSM-66 standardised root extract with L-theanine and vitamin B6, and formulated in the UK. The added vitamin B6 is a genuine part of why this pairing works so well, because it contributes to normal psychological function and to the normal functioning of the nervous system. We also explain why L-theanine is added. You can browse the full range on our home page.

The takeaway

An adaptogen is a heritage-based category of plants, a term coined in the mid-20th century, used to group herbs like ashwagandha, rhodiola and ginseng with long histories of traditional use for resilience and vitality. The modern evidence is modest and mixed, so it pays to stay level-headed. Judge any adaptogen supplement on the plant, the part, the standardised extract and the quality, rather than on the buzzword.

Bottle of Pure Vitamins Ashwagandha KSM-66 capsules with L-Theanine and Vitamin B6

Frequently asked questions

What is an adaptogen in simple terms?

It is a traditional category of plants, such as ashwagandha, rhodiola and ginseng, grouped together because they were proposed to help the body adapt to stress. It is a classification and heritage term, and the modern human evidence for it is modest and mixed.

Do adaptogens actually work?

The human evidence is modest and mixed. Some small studies in healthy adults are encouraging while others show no significant effect, so it remains an evolving research area rather than settled fact.

Is ashwagandha an adaptogen?

Yes, it is one of the most well known plants in the adaptogen category, with a roughly 3,000-year history of traditional use in Ayurveda and characteristic compounds called withanolides.

Who should avoid adaptogens?

Ashwagandha is generally advised against in pregnancy and breastfeeding, and people with thyroid or autoimmune conditions, or those taking sedatives, thyroid medication or immunosuppressants, should check with a GP or pharmacist first.

Shop Ashwagandha

Dr. Miron, Founder of Pure Vitamins UK.

This article is for general information and education only and is not medical advice. Food supplements are not a substitute for a varied, balanced diet and a healthy lifestyle. If you are pregnant, breastfeeding, taking medication or living with a health condition, speak to your GP or pharmacist before starting a supplement.

Tags: Adaptogen Ashwagandha Botanicals ginseng herbal supplements rhodiola Sleep & Stress stress resilience traditional medicine
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