11 best ashwagandha supplements for 2026, approved by experts and Glamour editors
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In a world obsessed with wellness, it’s easy to feel overwhelmed. But finding the best ashwagandha supplements for you may be one addition that you actually benefit from. So much so, I've personally kept it in my rotation for quite some time. Why? This natural herb is cited by experts to improve sleep, lower stress levels, and improve brain function — areas I'm always trying to work on.
But what actually is it? “So-called because of its ability to adapt to the body’s needs — whether they be physical, mental, or emotional — ashwagandha is classed as an adaptogenic plant,” explains nutritional therapist at Wild Nutrition, Sasha Parkin. “The benefits of ashwagandha are far-reaching — but it’s most widely used for its support in the management of stress and anxiety.”
In agreement, Registered Nutritional Therapist Sandrine Olmi explains that high-quality ashwagandha has adaptogenic properties, meaning it works in harmony with your body’s needs. “Research shows that ashwagandha can improve sleep, which in turn helps to reduce stress levels,” she says. “It can decrease morning cortisol levels, which indicates stress-relieving properties when taken for four to 12 weeks."
She adds that several studies presented benefits of high-quality ashwagandha in fertility problems, sleep quantity and quality, anxiety, metabolic disorders such as insulin resistance and diabetes, cognitive function and memory (visual memory, reaction time, psychomotor speed, and executive functioning), and obsessive-compulsive disorders. The list really does go on.
So how should you add ashwagandha to your supplement routine? Sometimes referred to as winter cherry or Indian ginseng, ashwagandha supplements are typically taken as a tincture, capsule, or powder. But to make sure that you’re actually getting the good stuff, finding a supplement that’s been made with KSM-66 Ashwagandha is your best bet. The subject of many studies, KSM-66 is extracted solely from the ashwagandha root — never the leaves — which means it has the highest percentage of potent withanolides.
Thankfully, I've tracked down a host that suits the above criteria and have personally tested them all. So, read on for our editors' recommendations for the best ashwagandha supplements, as well as insight from industry experts and answers to all your FAQs.
How I tested the best ashwagandha supplements:
The Glamour team are a high-performing bunch, moonlighting as athletes, mothers and side-hustlers at weekends. As a result, they had no complaints when asked to road-test a selection of supplements — sleep supplements, electrolytes, green powders — to see which would help them meet their fitness, focus and health goals.
Each willing volunteer was asked to try one ashwagandha supplement for a minimum of four weeks. At the end of their trial period, they were asked to consider the ease of use, efficacy — how long until they noticed a difference, if any at all — taste and value for money. Unsurprisingly, only our favourites made it into our edit below.
At the end of their trial period, they were asked to rate it against the following criteria:
- Ease of use — Were the capsules easy to swallow? Did the powder mix well with water?
- Efficacy — How long into the four weeks did they notice a difference, if any?
- Taste — On a scale of one to five, how pleasurable was the taste?
- Value for money — Would they be happy to commit to the weekly, monthly or bi-monthly spend?
Why you can trust me: Freelance contributor, Cat Hufton
I'm an experienced lifestyle journalist who has tested hundreds of products in my quest to find the best products worthy of your hard-earned money. I became particularly interested in wellness and health products after having children seven years ago, and I needed a little extra helping hand in feeling my best. Finding supplements to help me manage the everyday stresses of work and family life has also become a personal passion project of mine.
As such, I've spoken to countless industry experts, tested a wide variety of supplements and wellness products, and become pretty astute at knowing what really makes a difference.
Disclaimer: Keep in mind that this article isn't a substitute for professional medical advice, and our recommendations won't replace a healthy lifestyle and balanced diet.
Ahead, the best Ashwagandha supplements for 2026, approved by experts and Glamour editors:
Your ashwagandha FAQs, answered:
What are the benefits of ashwagandha?
Among experts and those in the know, Ashwagandha is praised for its many uses. However, it’s perhaps best known for how it can help the body adapt to both physiological and psychological stresses by reducing the activity of the HPA axis — AKA the body's main stress response system.
In doing this, your stress response isn’t activated, which means that the pituitary gland doesn’t stimulate the production of cortisol (AKA the stress hormone). As well as this, ashwagandha may also help with your sleep, focus, energy levels, and cognitive function, as well as balancing your blood sugar levels.
“Growing scientific evidence supports the many health benefits of ashwagandha, an adaptogenic herb,” says Dr Sidra Samad, Medical Consultant at Charava. "By lowering cortisol levels, reducing anxiety, and enhancing overall resilience, it helps the body adapt to stressful situations. Clinical research has demonstrated improvements in mood stability, cognitive function, and sleep quality, especially in people with chronic stress.
She continues: “By improving mitochondrial function and lowering fatigue, ashwagandha also promotes energy and endurance. According to research, it may help regulate thyroid and adrenal hormones in both sexes and increase testosterone and fertility in men.”
Nutritional therapist Caroline Mason agrees that it's especially beneficial for men: “For men specifically, ashwagandha is also a great supplement for fertility, and to support the production of healthy testosterone." She flags one study which tested the impact of ashwagandha on men with fertility issues and found it prompted a vast improvement in sperm quality, with an impressive 14% of partners becoming pregnant.
How and when should you take ashwagandha supplements?
“The best way to take ashwagandha depends on your goals, but consistency and quality matter the most," recommends Samad. "Most people benefit from taking 300 – 600 mg daily, preferably with food to enhance absorption.
Sandrine Olmi, a Registered Nutritional Therapist adds that ashwagandha capsules and tinctures can be taken at any time of day, depending on your needs. “You can choose to take it in the morning to support energy levels and stress management, or if you are looking for calm and relaxation, it is best to take it at night,” she says. It is normally recommended to take Ashwagandha with food.
In terms of which types — capsules, gummies, gels or drinkable powders — Samad praises capsules for their convenience and accurate dosing. However, powders added to warm milk, smoothies, or herbal tea avoid adding a step to your morning routine.
How do I know if an ashwagandha supplement is high quality?
When it comes to finding the most high-quality ashwagandha, Olmi explains that there are two forms available: KSM-66 and regular ashwagandha. “Traditional ashwagandha is composed of extracts derived from both the leaf and root of the ashwagandha plant, whereas KSM-66 ashwagandha combines a clinically validated dose of the most researched ashwagandha root extract with third-party testing.”
Can you take too many supplements?
“While supplements are considered safe to take, more isn't always better,” details Samad. "For example, ashwagandha doesn't require high or frequent dosages to work; rather, it restores hormonal and stress balance gradually. According to research, most adults can safely and effectively take doses of 300 – 600 mg of standardised extract daily.”
Of course, following the manufacturer's dosage instructions is always recommended, and if concerned, check in with your GP — especially if you're pregnant, nursing, or taking any other medication.
How long does it take for ashwagandha to start working?
Consistency is key when it comes to starting your ashwagandha journey: “In most cases, it makes a wonderful daily supplement — and you can expect to feel the difference in four to 12 weeks,” details Mason.
Who shouldn't take ashwagandha — and are there any side effects?
As always, if you’re unsure about whether a supplement is suitable for you, check with your GP or a trusted healthcare professional — especially if you have underlying medical issues. It's also not advisable to take ashwagandha if you're pregnant or breastfeeding.
“Anyone who’s taking medication should definitely speak with their doctor or seek medical advice beforehand, as ashwagandha can interact with blood pressure, immunosuppressants, sedatives, anti-seizure, diabetic and thyroid medications,” says Mason.
In terms of potential side effects, only a small percentage of people who use ashwagandha have issues with ashwagandha. “Side effects are very rare — but as typically reported to be nausea, a change in bowel movements, or an upset stomach," says Mason.
Olmi does add, however, that although most research data indicate that ashwagandha supplementation is safe and tolerable for up to three months, more data is needed to evaluate the safety of higher doses and longer periods of supplementation.
Meet the experts:
| Caroline Mason | Registered Nutritional Therapist at Baldo & Mason. |
| Sasha Parkin | Nutritional Therapist at Wild Nutrition. |
| Sandrine Olmi | Registered Nutritional Therapist |
| Dr Sidra Samad | Medical Consultant at Charava. |












