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Lily
Lily
Star Star Star Star Star
5 / 5

I take KSM-66 Ashwagandha® every morning. I feel calmer during the day and sleep better at night.

KSM + OK!FatBurn

Food supplement with sweetener

Program to reduce stress, anxiety, and cortisol levels¹ and promote the reduction in body weight⁴

KSM-66 Ashwagandha

  • Backed by 32+ studies¹
  • Proven to reduce stress, anxiety, and cortisol levels¹
  • Enhances memory, cognition, and mental alertness¹
  • Improves sleep quality and sleep onset1
  • Contributes to optimal relaxation4
  • Promotes the reduction in body weight⁴


OK!FatBurn

  • Inhibits up to 77% of carbohydrate-digesting enzymes5
  • Inhibits up to 63% of fat-digesting enzymes5
  • Contributes to normal energy-yielding metabolism8
  • Contributes to normal functioning of the nervous system8
  • Contributes to normal psychological function8

More than 4.7 million customers from all over the world

Neto 300 g | for 45 days
How to Use

First 30 days:
KSM-66 Ashwagandha
Mix 5 g (1 scoop) into a glass of water (150 ml) and drink. For precise measuring we suggest weighing.

Following 15 days:
OK!FatBurn
Twice a day, mix 5 g (1 scoop) in a glass of water and drink. We recommend that you drink it before the main meals. For precise measuring, we suggest weighing.

Warning:

The recommended daily amount should not be exceeded. Food supplement is not a substitute for a balanced and varied diet and a healthy lifestyle. Keep out of reach of children. Not recommended to use during pregnancy and lactation.

Due to natural variations in the properties of the active ingredients, the colour, taste and smell of the product may vary slightly from batch to batch. These changes do not affect the overall quality and performance of the product.

Storage: Store in a cool and dry place.

 

Key Ingredients

KSM-66 Ashwagandha® – food supplement with sweetener

Ingredients: tapioca powder, KSM66 – Ashwagandha [Withania somnifera D.] root 5% Withanolides [HPLC] extract, ginseng extract (Panax ginseng C. A. Mey, root), chamomile (Matricaria chamomilla L., flower) extract, stabilizer: cellulose, lemon flavour, B-complex (vitamin B1 (Thiaminmononitrate), vitamin B2 (Riboflavine), vitamin B3 (Nicotine amid), vitamin B5 (Calcium-D-pantothenate), vitamin B6 (Pyridoxine hydrochloride), vitamin B9 (Pteroylmonoglutamic acid), vitamin B12 (Cyanocobalamid)), sweetener: steviol glycosides from stevia.

Contains naturally occurring sugars.

KSM-66 Ashwagandha® is a registered trademark of Ixoreal Biomed Inc.

OK!FatBurn – food supplement with sweetener

Ingredients: tapioca starch, sweetener erythritol, vitamin C (ascorbic acid), ID-alG ™ ((extract of seaweed (Ascophyllum nodosum,) (50%), grape powder extract (Vitis vinifera, seed) (50%)), lemon flavor, L-carnitine, L-thyrosine, stabilizer: cellulose, beetroot concentrate [maltodextrin, beetroot powder (Beta vulgaris)] (1,5 %), sweetener: steviol glycosides from stevia.

Contains naturally occuring SULFITES.

Nutritional Value

KSM-66 Ashwagandha®

Active ingredients per serving (5 g)
KSM-66 Ashwagandha® extract 300 mg
 – of which withanolides 15 mg
Panax ginseng extract 100 mg
Chamomile extract 100 mg
Vitamin B1  1,1 mg (100 % NRV*)
Vitamin B2 1,4 mg (100 % NRV*)
Vitamin B6 1,4 mg (100 % NRV*)
Vitamin B12 2,5 μg (100 % NRV*)
Folic acid 200 μg (100 % NRV*)
Pantothenic acid 6 mg (100 % NRV*)
Niacin 16 mg (100 % NRV*)
* NRV = nutritional reference value
OK!FatBurn
Active ingredients Per 5g
Vitamin C 250 mg (312 % NRV*)
ID-alG ™ 200 mg
L-Carnitine 150 mg
L-Tyrosine 100 mg

* NRV = Nutritional Reference Value

Certifications

Why Independent Testing Is Essential At Nature’s Finest, we believe that wellness starts with trust.

Here’s what our testing covers:

  • Ingredient Precision: We verify that the nutrients listed on our labels are present in the exact amounts promised.
  • Purity & Cleanliness: Each product is screened for substances such as heavy metals (including mercury, lead, and arsenic), common allergens (like soy, dairy, nuts, and gluten), and microbial threats like E. coli and salmonella.
  • Nutrient Verification: We confirm that both macronutrients and micronutrients are present and potent.

Explore our IFS Food Standard certification—the highest level of quality assurance in the industry—and see why Nature’s Finest stands above the rest. View our certification here.

£29.98 £53.89
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Subscription
One-time purchase

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For just you get the same. A simple way to enjoy the best prices. You can change or cancel your subscription at any time!

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Delivery in 2 business days
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Questions? Call us: 020 8089 0131

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Everything you need to know:

What are the common signs my body needs support to manage stress?

Your body often tells you when it’s under too much stress. Common signs include:

  • Finding it hard to fully relax or switch off after a demanding day.
  • Feeling less calm or patient than usual in everyday situations.
  • Reaching for snacks, sweets, or extra coffee to keep going through the day.
  • Noticing dips in energy or focus as the day progresses.
  • Feeling tension build up in your body after long hours or busy days.
  • Having moments when it’s harder to stay motivated or clear-minded.
How does KSM-66 Ashwagandha® support me?

KSM-66 Ashwagandha® is a full spectrum natural extract that proven to reduce stress, anxiety, and cortisol levels1.

Regular use can offer the following:

  • Proven to reduce stress, anxiety, and cortisol levels¹
  • Enhances memory, cognition, and mental alertness¹
  • Improves sleep quality and sleep onset¹
  • Contributes to optimal relaxation⁴
  • Promotes the reduction in body weight⁴
What results can I expect from using OK!Fatburn?

OK!Fatburn inhibits up to 77% of carbohydrate-digesting enzymes⁵ and up to 63% of fat-digesting enzymes⁵. At the same time, it contributes to normal energy-yielding metabolism⁸, supporting the body’s natural process of converting food into energy. In addition to these benefits, regular use of OK!Fatburn as part of this package can offer even more support when taken consistently and according to the instructions for use.

When can I expect to see results?

Results vary from person to person. For visible results, we recommend regular and consistent use of the products.

Our customers also confirm it works

star star star star star 4.9 / 5
Jack
star star star star star 5/5

I started using it after work and it helps me unwind. I notice I don’t carry the stress from my day into the evening anymore.

Jack
Monica
star star star star star 5/5

I’ve been using this package for some time, and my coworkers say I’ve noticeably slimmed down.

Monica
David
star star star star star 5/5

OK!FatBurn truly works! I of course like to do a bit of sport, so the effects are even better.

David
Ava
star star star star star 5/5

What I like most about KSM-66 Ashwagandha® is how easy it is to use. I just mix it with water and it’s ready in a few seconds. It’s simple and fits perfectly into my day.

Ava
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The world’s most researched Ashwagandha - supported by studies

These are the key benefits of KSM – 66 Ashwagandha®

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Feature icon

Proven to reduce stress, anxiety, and cortisol levels¹
This formula is proven to reduce stress, anxiety, and cortisol levels¹, supporting the body throughout the day.

Feature icon

Enhances memory, cognition, and mental alertness¹

Due to the content of KSM-66 Ashwagandha®, this formula enhances memory, cognition, and mental alertness¹ and provides you with the support you need in everyday challenges.

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Contributes to optimal relaxation⁴
The presence of Chamomile extract in the product contributes to optimal relaxation⁴, which is especially beneficial in the fast-paced life we live.

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Promotes the reduction in body weight⁴
A very important benefit that KSM-66 Ashwagandha® can offer is that it promotes the reduction in body weight⁴, which, especially in combination with OK!Fatburn, can help you reach your body weight goals more easily.

Uncover the main advantages of the innovative OK!FatBurn formula

Power-packed blend featuring ID-alG™, L-Carnitine, L-Tyrosine, and Vitamin C

Feature icon

Inhibits up to 77% of carbohydrate-digesting enzymes⁵ and up to 63% of fat-digesting enzymes⁵

This formula inhibits up to 77% of carbohydrate-digesting enzymes⁵ and up to 63% of fat-digesting enzymes⁵, supporting the body during meals throughout the day.

Feature icon

Contributes to normal energy-yielding metabolism⁸

With the addition of vitamin C, Ok!Fatburn contributes to normal energy-yielding metabolism⁸, which is one of the many important reasons to take it regularly.

Feature icon

Contributes to normal functioning of the nervous system⁸ and psychological function⁸

This formula contributes to normal functioning of the nervous system⁸ and to normal psychological function⁸, making it a valuable part of a consistent daily regimen.

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Transform your routine in 45 days

Scoop, stir, sip – your simple 3-step daily ritual

Product option image

First 30 days: KSM-66 Ashwagandha

Step 1
Add 1 scoop (5 g) of KSM-66 Ashwagandha to a glass of water (150 mL).

Step 2
Stir lightly until mixed.

Step 3
Drink once a day. For precise measuring, we suggest weighing.

Following 15 days: OK!FatBurn

Step 1
Add 1 scoop (5 g) of OK!FatBurn to a glass of water.

Step 2
Stir lightly until mixed.

Step 3
Drink twice a day, preferably before main meals. For precise measuring, we suggest weighing.

Product option image

Reasons to start using KSM+OK!Fatburn today

If you start using KSM+OK!Fatburn today:

  • You help reduce stress, anxiety, and cortisol levels¹
  • You enhance memory, cognition, and mental alertness¹
  • You promote the reduction in body weight⁴
  • You improve sleep quality and sleep onset¹
  • You contribute to normal energy-yielding metabolism⁸
  • You contribute to normal functioning of the nervous system⁸ and psychological function⁸
  • You can start enjoying all the benefits of this bundle

If you start using KSM+OK!Fatburn later:

  • You miss out on support for reducing stress, anxiety, and cortisol levels
  • You continue without the benefits of improved focus and mental clarity
  • You miss out on support for the reduction in body weight
  • You miss out on contributing to normal energy-yielding metabolism
  • You miss out on contributing to normal functioning of the nervous system⁸ and psychological function
  • You postpone enjoying all the benefits this bundle has to offer

Made from quality ingredients

KSM-66 Ashwagandha®

1. KSM-66 Ashwagandha®

KSM-66 is one of the highest concentration, full-spectrum ashwagandha root extract on the market today, standardized to >5% withanolides by HPLC.

Panax ginseng

2. Panax ginseng

Panax ginseng is a traditional adaptogenic root extract with a light beige to brown color, a characteristic herbal aroma, and a mildly bitter taste. It is known for its numerous benefits, including helping to maintain good cognitive performance and physical and mental capacities in cases of weakness, exhaustion, tiredness, and loss of concentration.

B-complex

3. B-complex

The B complex is a group of vitamins B1, B2, B6, B12, folic acid, pantothenic acid and niacin, which are important for our nervous system. In addition to their common function, each of the B vitamins has other important roles in our bodies.

Chamomile extract

4. Chamomile extract

Chamomile extract is a plant extract derived from chamomile flowers. Chamomile supports digestion and helps with indigestion and flatulence.

ID-alG™

5. ID-alG™

ID-alG™ is a grape seed extract and an extract of the brown seaweed Ascophyllum nodosum, which is rich in long-chain polyphenols called phlorotannins. Ascophyllum nodosum reduces fat absorption and helps eliminate fat deposits, which consequently affects body weight.

L-Carnitine

6. L-Carnitine

L-carnitine is an amino acid derivative. It is a natural compound that is produced by the body itself or can be obtained from certain foods and food supplements.

L-Tyrosine

7. L-Tyrosine

L-Tyrosine is a non-essential amino acid that occurs naturally in the human body and in a variety of protein-containing foods. It is a building block used by the body in several biological processes and is a precursor to various naturally occurring compounds.

Vitamin C

8. Vitamin C

Vitamin C plays a role in the protection of cells from oxidative stress. It contributes to the functioning of the nervous system, has a role in the functioning of the immune system and contributes to the reduction of tiredness and fatigue . Vitamin C also contributes to normal collagen formation.

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Traceability of our raw materials

We select every ingredient with the utmost care and monitor it closely to ensure optimal efficacy—supported by scientifically proven effectiveness.
Our commitment to transparent traceability guarantees the integrity and excellence of every component in our products.
Our products are certified in accordance with the IFS Standard under registration number: 00063/0, and by KON-CERT under certificate number: EPR-26420/22-1.

High-quality ingredients

Carefully selected, pure formulation.

Carefully selected, pure formulation

Environmentally friendly packaging.

Less waste, more care for the planet

Third-party tested according to verified standards.

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60-Day Money-Back Guarantee

To make your purchase risk-free, we offer a 60-day money-back guarantee.
If you’re not completely satisfied with the product, simply contact us—we’ll refund your money.

-44%
KSM + OK!FatBurn

KSM + OK!FatBurn

One package, multiple benefits

  • Proven to reduce stress, anxiety, and cortisol levels¹
  • Contributes to normal energy-yielding metabolism⁸
  • Contributes to normal psychological function⁸
  • Promotes the reduction in body weight⁴
  • Contributes to optimal relaxation⁴

Frequently asked questions from our users

FAQ

How and why does it work?

With just one package, you get two different products, each offering unique benefits through carefully selected ingredients.

FAQ

Who is it for?

The KSM+OK!FatBurn package is designed for anyone looking to support their body in reducing stress, anxiety, and cortisol levels¹, contribute to the normal functioning of the nervous system³, promote weight loss⁴, and contribute to normal energy-yielding metabolism⁸.

FAQ

What products does the package contain?

The package consists of two products: KSM-66 Ashwagandha® and OK!FatBurn.

FAQ

How long can I expect to see results?

The time it takes to see results can vary from person to person. For best effects, we recommend using the products in the package consistently and as directed.

FAQ

How long does shipping take?

We will do our best to process your order the same day and send it for delivery. On average, packages are delivered in 2 business days.

FAQ

What if I don't like it?

No worries! If the product does not meet your expectations, we offer a 60-day refund.

Previous
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-44%
Lily
Lily
Star Star Star Star Star
5 / 5

I take KSM-66 Ashwagandha® every morning. I feel calmer during the day and sleep better at night.

KSM + OK!FatBurn

Food supplement with sweetener

Program to reduce stress, anxiety, and cortisol levels¹ and promote the reduction in body weight⁴

KSM-66 Ashwagandha

  • Backed by 32+ studies¹
  • Proven to reduce stress, anxiety, and cortisol levels¹
  • Enhances memory, cognition, and mental alertness¹
  • Improves sleep quality and sleep onset1
  • Contributes to optimal relaxation4
  • Promotes the reduction in body weight⁴


OK!FatBurn

  • Inhibits up to 77% of carbohydrate-digesting enzymes5
  • Inhibits up to 63% of fat-digesting enzymes5
  • Contributes to normal energy-yielding metabolism8
  • Contributes to normal functioning of the nervous system8
  • Contributes to normal psychological function8

More than 4.7 million customers from all over the world

Neto 300 g | for 45 days
How to Use

First 30 days:
KSM-66 Ashwagandha
Mix 5 g (1 scoop) into a glass of water (150 ml) and drink. For precise measuring we suggest weighing.

Following 15 days:
OK!FatBurn
Twice a day, mix 5 g (1 scoop) in a glass of water and drink. We recommend that you drink it before the main meals. For precise measuring, we suggest weighing.

Warning:

The recommended daily amount should not be exceeded. Food supplement is not a substitute for a balanced and varied diet and a healthy lifestyle. Keep out of reach of children. Not recommended to use during pregnancy and lactation.

Due to natural variations in the properties of the active ingredients, the colour, taste and smell of the product may vary slightly from batch to batch. These changes do not affect the overall quality and performance of the product.

Storage: Store in a cool and dry place.

 

Key Ingredients

KSM-66 Ashwagandha® – food supplement with sweetener

Ingredients: tapioca powder, KSM66 – Ashwagandha [Withania somnifera D.] root 5% Withanolides [HPLC] extract, ginseng extract (Panax ginseng C. A. Mey, root), chamomile (Matricaria chamomilla L., flower) extract, stabilizer: cellulose, lemon flavour, B-complex (vitamin B1 (Thiaminmononitrate), vitamin B2 (Riboflavine), vitamin B3 (Nicotine amid), vitamin B5 (Calcium-D-pantothenate), vitamin B6 (Pyridoxine hydrochloride), vitamin B9 (Pteroylmonoglutamic acid), vitamin B12 (Cyanocobalamid)), sweetener: steviol glycosides from stevia.

Contains naturally occurring sugars.

KSM-66 Ashwagandha® is a registered trademark of Ixoreal Biomed Inc.

OK!FatBurn – food supplement with sweetener

Ingredients: tapioca starch, sweetener erythritol, vitamin C (ascorbic acid), ID-alG ™ ((extract of seaweed (Ascophyllum nodosum,) (50%), grape powder extract (Vitis vinifera, seed) (50%)), lemon flavor, L-carnitine, L-thyrosine, stabilizer: cellulose, beetroot concentrate [maltodextrin, beetroot powder (Beta vulgaris)] (1,5 %), sweetener: steviol glycosides from stevia.

Contains naturally occuring SULFITES.

Nutritional Value

KSM-66 Ashwagandha®

Active ingredients per serving (5 g)
KSM-66 Ashwagandha® extract 300 mg
 – of which withanolides 15 mg
Panax ginseng extract 100 mg
Chamomile extract 100 mg
Vitamin B1  1,1 mg (100 % NRV*)
Vitamin B2 1,4 mg (100 % NRV*)
Vitamin B6 1,4 mg (100 % NRV*)
Vitamin B12 2,5 μg (100 % NRV*)
Folic acid 200 μg (100 % NRV*)
Pantothenic acid 6 mg (100 % NRV*)
Niacin 16 mg (100 % NRV*)
* NRV = nutritional reference value
OK!FatBurn
Active ingredients Per 5g
Vitamin C 250 mg (312 % NRV*)
ID-alG ™ 200 mg
L-Carnitine 150 mg
L-Tyrosine 100 mg

* NRV = Nutritional Reference Value

Certifications

Why Independent Testing Is Essential At Nature’s Finest, we believe that wellness starts with trust.

Here’s what our testing covers:

  • Ingredient Precision: We verify that the nutrients listed on our labels are present in the exact amounts promised.
  • Purity & Cleanliness: Each product is screened for substances such as heavy metals (including mercury, lead, and arsenic), common allergens (like soy, dairy, nuts, and gluten), and microbial threats like E. coli and salmonella.
  • Nutrient Verification: We confirm that both macronutrients and micronutrients are present and potent.

Explore our IFS Food Standard certification—the highest level of quality assurance in the industry—and see why Nature’s Finest stands above the rest. View our certification here.

£29.98 £53.89
-44%
Subscription
One-time purchase

Switch to subscription and save
For just you get the same. A simple way to enjoy the best prices. You can change or cancel your subscription at any time!

Add to cart ➝
Return guarantee icon 60-day money-back guarantee
Free delivery icon Free delivery over £50.00
Delivery in 2 business days
visa mastercard american_express paypal

Questions? Call us: 020 8089 0131

Badge 1
Badge 2
Badge 3
Badge 4
Badge 5

First 30 days:
KSM-66 Ashwagandha
Mix 5 g (1 scoop) into a glass of water (150 ml) and drink. For precise measuring we suggest weighing.

Following 15 days:
OK!FatBurn
Twice a day, mix 5 g (1 scoop) in a glass of water and drink. We recommend that you drink it before the main meals. For precise measuring, we suggest weighing.

Warning:

The recommended daily amount should not be exceeded. Food supplement is not a substitute for a balanced and varied diet and a healthy lifestyle. Keep out of reach of children. Not recommended to use during pregnancy and lactation.

Due to natural variations in the properties of the active ingredients, the colour, taste and smell of the product may vary slightly from batch to batch. These changes do not affect the overall quality and performance of the product.

Storage: Store in a cool and dry place.

 

KSM-66 Ashwagandha® – food supplement with sweetener

Ingredients: tapioca powder, KSM66 – Ashwagandha [Withania somnifera D.] root 5% Withanolides [HPLC] extract, ginseng extract (Panax ginseng C. A. Mey, root), chamomile (Matricaria chamomilla L., flower) extract, stabilizer: cellulose, lemon flavour, B-complex (vitamin B1 (Thiaminmononitrate), vitamin B2 (Riboflavine), vitamin B3 (Nicotine amid), vitamin B5 (Calcium-D-pantothenate), vitamin B6 (Pyridoxine hydrochloride), vitamin B9 (Pteroylmonoglutamic acid), vitamin B12 (Cyanocobalamid)), sweetener: steviol glycosides from stevia.

Contains naturally occurring sugars.

KSM-66 Ashwagandha® is a registered trademark of Ixoreal Biomed Inc.

OK!FatBurn – food supplement with sweetener

Ingredients: tapioca starch, sweetener erythritol, vitamin C (ascorbic acid), ID-alG ™ ((extract of seaweed (Ascophyllum nodosum,) (50%), grape powder extract (Vitis vinifera, seed) (50%)), lemon flavor, L-carnitine, L-thyrosine, stabilizer: cellulose, beetroot concentrate [maltodextrin, beetroot powder (Beta vulgaris)] (1,5 %), sweetener: steviol glycosides from stevia.

Contains naturally occuring SULFITES.

KSM-66 Ashwagandha®

Active ingredients per serving (5 g)
KSM-66 Ashwagandha® extract 300 mg
 – of which withanolides 15 mg
Panax ginseng extract 100 mg
Chamomile extract 100 mg
Vitamin B1  1,1 mg (100 % NRV*)
Vitamin B2 1,4 mg (100 % NRV*)
Vitamin B6 1,4 mg (100 % NRV*)
Vitamin B12 2,5 μg (100 % NRV*)
Folic acid 200 μg (100 % NRV*)
Pantothenic acid 6 mg (100 % NRV*)
Niacin 16 mg (100 % NRV*)
* NRV = nutritional reference value
OK!FatBurn
Active ingredients Per 5g
Vitamin C 250 mg (312 % NRV*)
ID-alG ™ 200 mg
L-Carnitine 150 mg
L-Tyrosine 100 mg

* NRV = Nutritional Reference Value

Why choose Nature’s Finest?

15

Years of tradition

400+

Unique products”

50+

Patented active ingredients

3mil+

Satisfied customers

Nature

We believe in the perfection of nature. Our commitment extends to the responsible sourcing of raw materials, including sustainability, ethics, and fair business practices. To reduce our carbon footprint, we use environmentally friendly packaging.

The effectiveness of our products is confirmed by verifiable and reproducible studies and research. All of our products are tested in independent laboratories, as our goal is to offer our customers only the highest-quality and most effective products for their money.

 
 

Nature offers effective solutions to many of the challenges we face. Our experienced development team harnesses and combines these exceptional substances in our products so the body can make optimal use of them. The active ingredients in our products are included in proven effective amounts—not just in small, negligible quantities.

We test our products through various user studies and trials to ensure their safety and effectiveness. We always listen closely to our customers’ feedback and take their opinions, reviews, and suggestions into account to ensure our products are truly tailored to their needs.

Meet our product development experts

We are proud that our team consists exclusively of top experts in nutrition and natural formulations, ensuring the development and outstanding quality of our products. With great dedication, they conduct studies and research and work closely with external laboratories, testing institutes, and other specialists to guarantee the highest quality and safety of our products.

Thanks to their extensive experience and industry expertise, our experts are committed to providing Nutrisslim customers with the most innovative products and to maintaining our status as one of the leading companies in the field of nutrition and dietary supplements.

Meta Bizjak

M.Sc. in Nutritional Engineering

Pia Fistrovič

Food and Nutrition Engineer

#WeAreNature

»Committed to bringing the most natural products to your home«

For over 15 years, Nature’s Finest has been dedicated to providing natural solutions for everyone who wants to overcome lifestyle-related challenges and discomforts. We use only 100% natural ingredients, produced traditionally, without additives or unnecessary processing. Whenever possible, we choose organically grown ingredients certified under SI-EKO-001.

Get your custom formula
– tailored to your body’s needs!

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