Ashwagandha KSM-66® 500mg - GymBeam | GymBeam.ba Skip to main content

Ashwagandha KSM-66® 500 mg is an extract from ashwagandha root (Withania somnifera). It is the most clinically researched form of this extract on the market, standardised to 5 % withanolides. KSM-66® has been examined in clinical studies focusing on areas such as cortisol levels and perceived stress, sleep quality, muscle strength during resistance training or memory and concentration. The product is vegan, free from allergens and GMO and we manufacture it in-house.

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Ashwagandha KSM-66® 500 mg – the most researched extract for body and mind

Ashwagandha KSM-66® 500 mg is a highly concentrated plant extract from the root of ashwagandha (Withania somnifera), a plant traditionally also known as Indian ginseng or winter cherry. Ashwagandha is one of the longest-used herbs in Indian Ayurveda and in recent years has become one of the most extensively clinically tested adaptogens in the world.

We use an extract known as KSM-66®, which is made using a gentle production process without alcohol or other solvents. It is standardised to a 5% withanolide content, the plant's main active compounds. KSM-66® is also the most clinically researched branded form of ashwagandha on the market. We regularly have this product tested by independent laboratories for heavy metals and microbiological safety, and we also manufacture it in-house.

Standardised extract
Standardised extract
5 % withanolides
Convenient dosing
Convenient dosing
1 capsule = 500 mg daily
Free from allergens and GMOs
Free from allergens and GMOs
Contains none of the 14 major allergens.
Free from chemical solvents
Free from chemical solvents
Gentle "green chemistry" production
Ashwagandha KSM-66® 500 mg – the most researched extract for body and mind
Ashwagandha benefits for body and mind

Ashwagandha is an herb for body and mind. It contributes to resilience to stress and helps maintain steady energy throughout the day. In the evening, it can support a calm transition to sleep and good sleep quality. It also has a place in your training routine. It may help with building muscle mass and support memory and learning ability. It also benefits reproductive health in both women and men, as well as supporting skin and respiratory health. This makes it a truly versatile supplement that helps support vitality and the functioning of the whole body.

What are withanolides, and why do we standardise the product for them?

Withanolides are a group of natural steroidal compounds, considered to be primarily responsible for ashwagandha's effects. Standardising to a precise withanolide content (for KSM-66®, at least 5 %) ensures that each dose contains a comparable amount of active compounds. This means the same concentration of withanolides in the extract, not an identical amount in every study dose. This is a key difference compared with non-standardised ashwagandha root powders, whose active compound content can vary considerably from batch to batch.

What do clinical studies say about ashwagandha KSM-66®?

1) Stress and cortisol levels

In a double-blind, placebo-controlled study, 64 people with chronic stress received treatment for 60 days with either 600 mg KSM-66® daily or a placebo. The ashwagandha group experienced a reduction in serum cortisol levels of 27,9 %, exceeding the 7,9 % decrease in the placebo group.¹

  • Stress scores on the GHQ-28 scale fell by 72,3 %.
  • Scores on the DASS scale fell by 71,6 %.
  • Scores on the PSS (Perceived Stress Scale) fell by 44 %.

2) Sleep quality

Another study followed 80 people, including healthy volunteers and people with insomnia, for 8 weeks at a dose of 600 mg KSM-66® daily. Both groups showed significant improvements in sleep parameters (time taken to fall asleep, total sleep time and sleep efficiency, assessed using actigraphy and the PSQI questionnaire), with greater improvements in participants with insomnia.²

3) Muscle strength and post-workout recovery

Researchers have also investigated the effects of ashwagandha KSM-66® on muscle strength and recovery. One example is a study involving 57 young men who had started strength training. Participants who took 600 mg of ashwagandha KSM-66® extract for 8 weeks experienced the following results: ³

  • A 75 % greater increase in bench press strength compared with placebo.
  • A 48 % greater increase in leg extension strength.
  • A greater increase in muscle size and reduction in body fat.
  • A greater increase in testosterone levels and lower levels of creatine kinase (a marker of muscle damage), indicating faster recovery.

4) Memory and cognitive function

The effects of ashwagandha on brain function were investigated in a study with 50 participants who, for 8 weeks, took a daily dose of 600 mg KSM-66®. Compared with placebo, there were significant improvements in immediate and overall memory, executive function, attention and information processing speed.⁴

5) Reproductive health

Ashwagandha KSM-66® has also been studied in relation to reproductive health, separately in men and women. In men with low sperm counts, supplementation for 12 weeks was associated with improvements in sperm concentration and motility.⁵ In women, eight weeks of supplementation was associated with improved sexual function scores and overall sexual satisfaction.⁶

What do clinical studies say about ashwagandha KSM-66®?
What makes GymBeam's ashwagandha KSM-66® different from standard products?

For dietary supplements, safety and transparency throughout the process are essential, from selecting the extract to the finished capsule. Here are 4 things GymBeam does differently:

  1. The extract has a laboratory-verified content of at least 5 % withanolides and carries the KSM-66® trademark, which guarantees standardised quality and origin.
  2. We manufacture the capsules in-house at a facility with ISO 9001 certification and a HACCP system.
  3. Ashwagandha KSM-66® undergoes independent laboratory testing for withanolide content, heavy metals (lead, cadmium, mercury) and microbiological safety (Salmonella, E. coli).
  4. The product is completely free from GMOs and allergens, and the extract is obtained without alcohol or other chemical solvents.
What makes GymBeam's ashwagandha KSM-66® different from standard products?

Who is ashwagandha KSM-66® suitable for?

1. People with physically and mentally demanding jobs
who are looking for support in managing stress.

2. Students and people with high mental demands
who would appreciate support for memory and concentration.

3. People seeking natural support for mental resilience
without stimulants.

4. Athletes and people who do strength training
who want to support training adaptation and recovery.

5. People who have trouble falling asleep
or struggle with sleep quality.

6. Men and women
interested in supporting reproductive health.

Who is ashwagandha KSM-66® suitable for?
When should you take ashwagandha KSM-66®?

You can take ashwagandha KSM-66® at any time of day, as the exact timing of doses made little difference to the results in clinical studies.

  • In the morning, with breakfast: Suitable if you primarily want to use ashwagandha to support stress resilience and maintain energy throughout the day.
  • In the evening, with a meal: Suitable if your main goal is to support falling asleep and sleep quality, or if you experience a mild calming effect after taking it.
  • Any time, as long as you take it consistently: Ashwagandha is neither a stimulant nor a sedative; it is an adaptogen, so the exact time matters less. It is much more important to take it daily over the long term, as its effects develop gradually over several weeks.
Long-term use of ashwagandha KSM-66®

Ashwagandha KSM-66® can be taken continuously over the long term. Most of the clinical studies on which this description is based lasted 8 to 12 weeks, which is also the time after which the full effects can be expected.

  • Cycling (taking breaks) is not necessary according to the available data. Ashwagandha is not a substance that the body gets "used to" to the point where it stops working, nor is there a risk of withdrawal effects.
  • Data beyond 12 months is currently limited. If you plan to take it for several years, we recommend consulting a doctor from time to time (e.g. 1x a year), as with other supplements taken over the long term.
  • The effects build gradually. Do not expect an immediate effect after the first dose; in clinical studies, benefits typically only appeared after several weeks of regular use.

Sources and scientific evidence

  1. Chandrasekhar, K., Kapoor, J., & Anishetty, S. (2012). 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. Published in the Indian Journal of Psychological Medicine, 34(3), 255-262. DOI: 10.4103/0253-7176.106022
  2. Langade, D., Thakare, V., Kanchi, S., & Kelgane, S. (2021). Clinical evaluation of the pharmacological impact of ashwagandha root extract on sleep in healthy volunteers and insomnia patients. Published in the Journal of Ethnopharmacology, 264, 113276. DOI: 10.1016/j.jep.2020.113276
  3. Wankhede, S., Langade, D., Joshi, K., Sinha, S. R., & Bhattacharyya, S. (2015). Examining the effect of Withania somnifera supplementation on muscle strength and recovery: a randomized controlled trial. Published in the Journal of the International Society of Sports Nutrition, 12, 43. DOI: 10.1186/s12970-015-0104-9
  4. Choudhary, D., Bhattacharyya, S., & Joshi, K. (2017). Efficacy and safety of ashwagandha root extract in improving memory and cognitive functions. Published in the Journal of Dietary Supplements, 14(6), 599-612. DOI: 10.1080/19390211.2017.1284970
  5. Ambiye, V. R., Langade, D., Dongre, S., Aptikar, P., Kulkarni, M., & Dongre, A. (2013). Clinical evaluation of the spermatogenic activity of the root extract of Ashwagandha in oligospermic males: a pilot study. Published in Evidence-Based Complementary and Alternative Medicine, 2013, 571420. DOI: 10.1155/2013/571420
  6. Dongre, S., Langade, D., & Bhattacharyya, S. (2015). Efficacy and safety of Ashwagandha root extract in improving sexual function in women: a pilot study. Published in BioMed Research International, 2015, 284154. DOI: 10.1155/2015/284154
  7. Salve, J., Kale, S., Prajapati, B. L., Sparavigna, A., Savant, M., Ademola, J., & Langade, D. (2025). Safety of 12-months administration of Ashwagandha (Withania somnifera) standardized root extract in healthy adults: a prospective, observational study. Published in Phytotherapy Research, 1-11. DOI: 10.1002/ptr.70096

 

Nutrition table

Nutritional values  1 capsule *RI
KSM-66® ashwagandha root extract (Withania somnifera) 500 mg **
 - Withanolides 25 mg **

**Reference intake for adults has not been established.


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Ashwagandha KSM-66® 500 mgAshwagandha KSM-66® 500 mgAshwagandha 500 mgAshwagandha YummiesAshwagandha Pro
FormCapsulesCapsulesGummiesCapsules
Extract typeKSM-66® (5 % withanolides)Extract 25:1 (5 % withanolides)Extract 10:1KSM-66® 12:1 (5 % withanolides)
Extract / serving500 mg500 mg150 mg600 mg (2 capsules)
Withanolides / serving25 mg25 mgnot specified30 mg
Other ingredients--Vitamin B6 (100 % RI)Magnesium 80 mg (21 %), zinc 5 mg (50 %), vitamin B6 2,8 mg (200 %)
Daily dose1 capsule1 capsule1 gummy2 capsules
Price per day dosage0,23 €0,07 €0,16 €0,23 €
Who it's forThe most researched form, for maximum confidence in its effects.Best value for money for everyday use.For those who find capsules and tablets unsuitable.A comprehensive blend with magnesium and zinc for broader support.
Composition and dosage

Dosage

  • The recommended daily dose is 1 capsule (500 mg extract, 25 mg withanolides), taken with plenty of water, ideally with a meal.
  • Clinical studies with KSM-66® used doses ranging from 300 to 675 mg daily, most commonly 600 mg daily split into two doses. Our 500mg capsule falls within this range with convenient 1× daily dosing.

Patented technologies

KSM66®
Product detail

Product description

Main category :
Manufacturer:
Distributor:
GymBeam Germany GmbH, Heinrich-Horten-Straße 22
Legal category of product:
dietary supplement
Form:
capsuled
Blend:
Single component
Dose size:
1 kapsula
Capsules:
180 caps
Pregnant woman:
No
Pregnant woman doctor:
No
Active Amount Unit:
mg
Functional Form:
standardized_extract
Lab Tested:
Yes
Stackable With:
multivitamin, Omega-3, Vitamin D, Magnesium
Contains Stimulants:
No
Capsule Type:
hard capsule
Active Amount per Daily Dose:
500
Standardized Extract:
Yes
Ingredient Origin Type:
Plant
Lab Test Type:
Microbiology, Heavy metals, Active content
Third Party Verified:
Yes
Country of Testing:
Germany
Storage Conditions:
Keep in a dry place out of direct sunlight at room temperature.
Capsule Count:
180
Active Amount per Serving:
500
Primary Goal:
Wellness
Travel Friendly:
Yes
Target User:
Unisex
Recommended Servings per Day:
1
Days of Use per Pack:
90-180
Sugar Free:
Yes
Free From:
gluten free, no added sugar, aspartame free, artificial sweetener free, Caffeine free, stimulant free, gelatin free, palm oil free, egg free, peanut free, nut free, Soy free
Product Dimensions:
6.8 × 6.8 × 12.1 cm
Age Range Description:
Not for children
Maximum Daily Dose:
1 kapsula
Base Ingredient:
Ašvaganda
Active Ingredient Form:
standardized_extract
Secondary Goals:
Focus
When to Use:
Anytime
Product Form:
Capsules
Other categories :

Reviews

Popularity

Category ranking#1 in Ashwagandha KSM-66®#2 in Ashwagandha#8 in Other Supplements #43 in Sports Nutrition

Composition

Vegan:
Vegetarian:
Gluten Free:
Lactose Free:
Bio:
GMO Free:
Artificial sweetener Free:

Allergen information

The product does not contain any allergens.

Packaging

Number of pieces per package:
78 pc.

Logistics

HS Code:
21069098: --- Ostatné
ean:
8586028136010
Netto Weight:
0.13 kg
Brutto weight:
0.18 kg
Length (cm):
6.80 cm
Width (cm):
6.80 cm
Height (cm):
12.10 cm
Plastic Packaging Free:
no
Laboratory Tests
Reviews

Ashwagandha KSM-66® 500mg - GymBeam

4.8
Average from 475 reviews
(421 reviews)
(27 reviews)
(17 reviews)
(5 reviews)
(5 reviews)
Most Beneficial Positive Review of Product

Željko

Verified purchase
Not only does it reduce stress, but it also boosts your energy levels and reduces fatigue. A great supplement. I’ve been using it for several months now and I can say that I have noticed that my body
Most Beneficial Negative Review of Product

Eddy

Verified purchase
In general, I am a calmer person; I don’t get angry that quickly—maybe that’s why I don’t notice a change. Maybe because I sleep better and have more patience, and I’m more calculated, more vigilant—I
All reviews (475)
English reviews (0)
Verified purchases (460)
Positive (465)
Negative (10)
  • С.К.

    Unverified purchase

    7/1/2026

    I advise you to read what the seller states and correct the supplement’s description. Here, the properties of Ashwagandha are stated incorrectly and far from completely. I learned about this supplement when I started fighting excess weight. And after several months of relentless self-discipline in the gym and nasty diets, I lost only about 11–12 kg. In the context of 155 kg, that’s nothing))). I have a good coach with a medical education. And he was the first to tell me: your lower abdominal area and sides stick out. This is what is called a “cortisol belly”. The issue needs to be addressed by blocking cortisol. Otherwise, even years in the gym won’t help. I asked ChatGPT what there is from medicine to reduce cortisol, but not medical drugs and “chemistry”. And the AI told me that it was Ashwagandha 500 mg, specifically KSM-66. Moreover, it said that this is obviously the best product in the world for blocking cortisol. It blocks 30% to 60% of cortisol — as a stress hormone and the culprit of internal visceral fat. It also advised me how to take it. Just 1 capsule in the morning after breakfast and 1 capsule at night after dinner. There are no restrictions, side effects, mixing with alcohol, etc. Nothing. As a recommendation, not to drink coffee in the morning especially with brewed coffee alongside the capsule, but to drink coffee after breakfast about half an hour after taking Ashwagandha. Because when you wake up in the morning and pour coffee into yourself, cortisol is at its peak. And here’s another trick — you shouldn’t do sports with heavy loads while taking Ashwagandha (Shout-out to the lazy ones). You should only walk after work in the evening, around 5–6 thousand steps. I’ll explain: the gym and lifting weights, heavy loads — that’s stress and therefore cortisol, with which Ashwagandha fights. One works against the other. Also, the AI explained that the effect will be in 2–3 weeks, because Ashwagandha needs to build up in your body. In general, I started taking it bravely. At first, it seemed like there was no effect. But after a couple of weeks, I started noticing that I wake up on my own, a little earlier than the alarm, and I get up easily. Well-rested, light, I do stretching. Good mood. And most importantly!!! The swelling went away!! My face looks normal, there are no bags under my eyes and the facial puffiness disappeared. And my legs too. In the morning, my sneakers and shoes became kind of a full size bigger, and my feet felt freer in my footwear. I continued taking it. I only walked and didn’t do any sports. I followed the diet only in terms of completely excluding sugar and sweets in any form — only the sweetener Erythritol (and I recommend it to all of you). No food after 19:00. I also cut out soda. Since morning coffee is not allowed, I started drinking a glass of warm water in the morning. I cut out potatoes and pasta products. That’s it.!!! And after a month and a half, my trousers practically “fell off” while I was walking)))) Seriously, my pants started to sag. Because of my weight and my belly, I didn’t wear a belt — there were no belts for me. It wouldn’t meet on my stomach. Now, after two and a half months of Ashwagandha, my belt not only fits, but it’s also fastened, and there’s a “tail” of 10–12 centimeters. Imagine that. The flanks above the trousers and the lower “belly” — they went away. Just like that??!!! I was blown away. It happened unnoticed. And no one told me anything — neither my close ones nor at work. And then, when I put on my regular jeans (previously unavailable), T-shirts, and polo shirts, everyone suddenly started saying how much I’d lost weight and how fast. Of course, we’re still far from ideal. From 155, over 3 months I went down to 113 — i.e., without much effort (except the initial gym). I lost 40 kg. With a height of 186 cm. It’s unbelievable. But please, believe me. You can’t say it was a placebo effect, because I didn’t believe in Ashwagandha as some “magic pill”. I thought I would lower the hormone-cortisol, lower stress, and maybe remove the internal fat so I could keep going to the gym and training. Like clearing up the body. And it turned out like this: fantastic sleep. I’m not woken up by air тревоги and I get enough rest with the same amount of sleep time. Lightness. I’ll remind you, I’m 54, and I have stressful work — I’m a company director in a frontline-adjacent area (Kharkiv). It says here about its influence on the sexual sphere. ))) I can’t judge the quality of sperm or its fertility, etc. But because I get enough sleep and I rest, sex improved noticeably. It’s nice at my age to wake up in the morning with constant erections like a teenager)))) Sorry, you can’t remove words from a song. But it works. Once again, I’ll say: you need to take it for more than 2 months to see results. For many people, 1 capsule at night is enough. And once again, I’ll repeat: you should buy this supplement specifically in white bottles and with KSM-66 labeling. Artificial intelligence says — this is the most important thing because the ingredient is not dried root, but an extract, and it is made according to all the rules for preserving beneficial substances. Ideally, there should be a green multi-color quality standard icon on the side of the bottle — EU standards. I took the product made in Slovenia. All in all, I highly recommend it with all my heart.
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  • M. M.

    Verified purchase

    8/29/2026

    Excellent product, I recommend it.
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  • B. K.

    Verified purchase

    8/29/2026

    I have been using it for quite some time now. It is a great product. 10/10 satisfaction.
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  • A. K.

    Verified purchase

    8/29/2026

    Does the job.
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  • Sergiu Oprea

    Verified purchase

    8/28/2026

    It has beneficial effects. I like that I feel more energetic after taking it.
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  • Dušan Šarocký

    Verified purchase

    8/28/2026

    SK
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  • Олекиій Чекрижов

    Verified purchase

    8/27/2026

    Good, sleep has improved and mood has stabilized.
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  • I.T.

    Verified purchase

    8/27/2026

    Good in the long term. I recommend it.
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  • Milan Chrenko

    Unverified purchase

    8/26/2026

    I know this product and recommend it for cortisol and a beer belly.
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  • Andrea Boaretti

    Verified purchase

    8/26/2026

    Good and valid
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Questions

FAQ

Your questions about the product
Anonymous|1/10/25
What are the main benefits of taking KSM-66® Ashwagandha?
Lamija M.|12/25/25
Is a 500mg daily dose of KSM-66® Ashwagandha effective?
Adis K.|3/31/24
Are there any side effects associated with KSM-66® Ashwagandha?
Mersad|5/2/26
I'm currently taking an SSRI for anxiety. Is it safe to add this 500mg KSM-66 Ashwagandha to my routine?
Vahid A.|3/25/26
I have a thyroid condition and take levothyroxine. Could this ashwagandha supplement interfere with my medication?
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