Adaptogenic Supplements: Benefits and Best Adaptogens
- , by SANUSq Research team
- 9 min reading time
From ashwagandha to reishi, "adaptogens" are everywhere right now — but what does the term actually mean, and does the science behind adaptogenic supplements hold up?
What is an adaptogen?
Adaptogens are a class of herbs and mushrooms traditionally used to help the body resist and adapt to stress — physical, mental and environmental. The concept comes from traditional systems like Ayurveda and Chinese medicine, and the modern definition adds some rigour: a true adaptogen should be non-toxic in normal doses, help the body cope with a wide range of stressors, and have a normalising effect — nudging the body back toward balance rather than pushing it in one direction. Well-known examples include ashwagandha, rhodiola, jiaogulan, reishi and ginseng.
What the term does — and doesn't — mean
It helps to be clear about what kind of word "adaptogen" is. It is not a pharmacological class in the way that "beta-blocker" or "antihistamine" is — those describe a shared mechanism at a known target. "Adaptogen" describes a hoped-for pattern of effect, and the plants grouped under it are botanically unrelated and chemically very different. Ashwagandha, rhodiola and reishi share a category on a shelf rather than a molecule.
The term also carries no regulatory meaning in the UK or the EU. Nothing has to be demonstrated before a product is described this way, and no authority certifies that a given herb qualifies. That does not make the category useless — it is a reasonable shorthand for a group of traditional stress tonics that modern research is now testing properly — but it does mean the word on a label reflects marketing convention rather than evidence. Judge each herb, and each preparation, on its own.
How they're thought to work
The leading explanation centres on the body's stress-response system, the hypothalamic-pituitary-adrenal (HPA) axis, and the stress hormone cortisol. Adaptogens are thought to help modulate this system, taking the edge off an over-active stress response.
In a randomised, double-blind, placebo-controlled trial, ashwagandha significantly reduced serum cortisol and stress-scale scores in chronically stressed adults compared with placebo (Chandrasekhar et al., 2012).
Adaptogens benefits: the evidence, honestly
Human research on adaptogens is growing and genuinely promising, but it's fair to say it's still maturing.
In a randomised, double-blind, placebo-controlled trial, a Gynostemma pentaphyllum (jiaogulan) extract significantly reduced anxiety in adults with chronic psychological stress compared with placebo (Choi et al., 2019).
Individual trials like these are encouraging, though many are small and results aren't always uniform — some studies find effects on stress hormones like cortisol without a matching change in how stressed people feel. So adaptogens are best viewed as promising, supportive tools for stress resilience, not guaranteed fixes. And a note on the phrase "restoring hormonal balance": adaptogens may help modulate the stress response, but they are not a treatment for diagnosed hormonal disorders — that's a matter for your doctor.
Why the effects are modest, and slow
Readers often expect a supplement to behave like a medicine: take it, feel it. That is not how these herbs work, and expecting it sets people up for disappointment. Where a trial finds an effect, it is typically a shift in an average score over several weeks, not a switch being flipped.
Two things further blunt what any one person will notice. The outcomes being measured — perceived stress, sleep quality, fatigue — are subjective and move around a good deal on their own, so a real but small effect is easily lost in ordinary week-to-week variation. And responses differ between individuals: a group average conceals the fact that some participants improve, some do not change, and some feel worse. Nothing in the research tells you in advance which of those you will be. The practical consequence is patience, and honesty with yourself — give one a fair run, change one thing at a time, and be willing to conclude it did nothing for you.
Where the evidence is thin
The weak points are worth naming plainly. Most published trials are small, run for a short period, and test a single branded extract, which makes it hard to know whether a result belongs to the herb or to that particular preparation. Head-to-head comparisons are rare, so claims that one herb beats another are seldom actually tested. And negative results are less likely to be published than positive ones, which tilts the overall impression of any supplement category.
Long-term safety data is the other gap. Centuries of traditional use are reassuring but are not the same as monitored study, and they say little about the concentrated extracts sold today or about interactions with modern medication. Adaptogens can interact with prescribed drugs, and some are not appropriate in pregnancy, while breastfeeding, or before surgery — a conversation for a pharmacist or doctor rather than a forum.
Popular adaptogens at a glance
Different adaptogens suit different aims. Ashwagandha is best known for stress and sleep; rhodiola for fatigue and mental stamina; jiaogulan as a gentle, caffeine-free option for energy and calm, which we explore in jiaogulan, the adaptogen to beat stress and fatigue; and reishi as an immune-supporting tonic, covered in the benefits of ganoderma (reishi).
For readers curious to explore them, SANUSq offers an Antioxidant, Adaptogen & Stamina bundle.
What to look for on the label
Preparations vary far more than the herb name on the front suggests, and the label is where the differences show.
- Which part of the plant. Root and leaf are not interchangeable, and most human research on ashwagandha uses the root. A label naming only the plant leaves this open.
- Extract or whole herb. A ratio such as 10:1 means ten parts of raw material were concentrated into one part of extract. It describes concentration, not quality, and ratios from different manufacturers are not directly comparable.
- Standardisation. A standardised extract is adjusted so each batch contains a stated amount of a marker compound. That is a consistency measure rather than proof of effect, but it is the main reason one batch resembles the next.
- Stated amounts. A blend listing only a combined total for several herbs tells you nothing about how much of any one of them you are taking.
Frequently asked questions
What are adaptogens?
Adaptogens are herbs and mushrooms traditionally used to help the body resist and adapt to stress. A true adaptogen should be non-toxic in normal use, help with a broad range of stressors, and have a balancing, normalising effect.
Do adaptogens actually work?
Human trials are promising — for example, ashwagandha reducing cortisol and jiaogulan reducing anxiety — but the research is still maturing, with many small studies and mixed results. They're best seen as supportive tools rather than guaranteed fixes.
Can adaptogens balance my hormones?
Adaptogens may help modulate the stress-response system and cortisol, but they are not a treatment for diagnosed hormonal disorders. Any hormonal concerns should be assessed by your doctor.
Which are the best adaptogens for me?
It depends on your goal: ashwagandha for stress and sleep, rhodiola for fatigue, jiaogulan for gentle energy and calm, reishi for immune support. There is no single ranking, so the best adaptogens for one person may not suit another. Many people try one at a time to see how they respond.
How long do adaptogenic supplements take to work?
Longer than most people expect. Trials that report an effect generally run for several weeks rather than days, and what they find is usually a modest shift in an average score. Give one a fair, uninterrupted run, and change one thing at a time so you can tell what, if anything, is responsible.
Are adaptogens safe?
Most are well tolerated in normal amounts, but they can interact with medications and aren't suitable for everyone. Check with your healthcare professional first, especially if you take medication or are pregnant or breastfeeding.
Explore adaptogens
Support your resilience to stress with our Antioxidant, Adaptogen & Stamina bundle.
References
- Chandrasekhar K, Kapoor J, Anishetty S. A prospective, randomized double-blind, placebo-controlled study of safety and efficacy of a high-concentration full-spectrum extract of ashwagandha root in reducing stress and anxiety in adults. Indian J Psychol Med. 2012;34(3):255-62. PMID 23439798
- Choi EK, Won YH, Kim SY, et al. Supplementation with extract of Gynostemma pentaphyllum leaves reduces anxiety in healthy subjects with chronic psychological stress: A randomized, double-blind, placebo-controlled clinical trial. Phytomedicine. 2019;52:198–205. PMID 30599899
Read more on the blog
- Jiaogulan: the adaptogen to beat stress and fatigue
- How can jiaogulan both energize and relax you?
- Ganoderma (reishi) benefits
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We wish you good health on your terms.
The team at SANUSq.
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The health information in this article is provided for educational purposes only. Consult your healthcare professional before making any medical decisions.
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