Serenity Ashwagandha KSM-66 800mg food supplement

Now available on Amazon UK

Serenity Ashwagandha KSM-66800mg. One clean formula. Nothing to hide.

Full-spectrum KSM-66 ashwagandha root extract, made in the UK, with a single anti-caking agent and nothing else added.

  • 800mg KSM-66 ashwagandha root extract per daily serving
  • Vegan  ·  Made in the UK
  • Bamboo silica is the only additional ingredient
  • 60 capsules  ·  30 servings
Buy on Amazon Fulfilled by Amazon — Prime delivery where eligible.

Customer reviews

In our customers' words

"I like that it uses KSM-66 full-spectrum root extract and clearly states the 800mg serving… The packaging is neat, and being made in the UK is another positive aspect for me."

John, Amazon UK, 30 September 2026
Amazon Vine review: the reviewer received the product free of charge.

"Overall I found this to be an excellent supplement. The capsules are a good size and easy to swallow… Ingredients are clearly listed and the vegan capsules are a nice touch."

LondonBoy, Amazon UK, 28 September 2026
Amazon Vine review: the reviewer received the product free of charge.

"I was given a free sample of Serenity Supplements Ashwagandha KSM 66… I highly recommend this product. Also really loved the effort and the freebies. Thank you."

Jenny Molland, Amazon UK, 22 September 2026
Jenny Molland was part of the first group to sample the product.

"One capsule contains 400mg of Ashwagandha Root Extract (KSM-66). One serving is 2 capsules, so that would make up 800mg of Ashwagandha Root Extract (KSM-66). So, it is a one-month supply. Overall, a decent vegan supplement at £29.99."

Maark, Amazon UK, 8 October 2026
Amazon Vine review: the reviewer received the product free of charge.
Read the full reviews on Amazon UK →

At a glance

800mg

KSM-66 root extract per serving

1

Additional ingredient: bamboo silica

Vegan

Plant-based capsule

UK

Manufactured in the United Kingdom

What's inside

Short ingredient list. On purpose.

KSM-66 is a branded, full-spectrum extract made only from the root of the ashwagandha plant — no leaves. It's one of the most widely researched ashwagandha extracts available.

Many capsules rely on several flow agents and fillers. This one uses bamboo silica as its only anti-caking agent. That's the whole list.

Ashwagandha root extract (KSM-66)800mg per serving
Anti-caking agentBamboo silica
CapsuleVegan
Pack size60 capsules (30 servings)
Directions2 capsules daily
Made inUnited Kingdom

Why I built this

"For over twenty years I've worked on building routines that help me stay steady. Ashwagandha became part of mine. When I went looking for a version I trusted completely — the right extract, the right amount, nothing unnecessary — I couldn't find it. So I made it."
Philip — Founder, Serenity Supplements

How to take it

Part of a routine, not a replacement for one.

Take 2 capsules daily. Do not exceed the recommended daily dose.

Supplements work best alongside the basics: sleep, movement, daylight, and time to switch off. That's what the free Calm Routines Guide and our TikTok are for.

Get the free Calm Routines Guide →

Questions

What is KSM-66?

A branded, full-spectrum ashwagandha extract produced from the root only, using a water-based process without alcohol or chemical solvents.

Is it vegan?

Yes. The capsule and all ingredients are plant-based.

Why is it only sold on Amazon?

Amazon handles storage and delivery, so your order ships quickly from UK fulfilment centres and you get Amazon's returns process.

Can I take it with medication?

Speak to your GP or pharmacist before taking any supplement if you take medication or have a medical condition.

Important: Food supplements should not be used as a substitute for a varied, balanced diet and a healthy lifestyle. Do not exceed the recommended daily dose. Keep out of the reach of young children. This product is not intended to diagnose, treat, cure or prevent any disease. If you are struggling with your mental health, please speak to your GP — see our support page for organisations that can help.

Ready when you are.

Serenity Ashwagandha KSM-66 800mg — available now on Amazon UK.

Buy on Amazon