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Why us?

Delivery within 4-6 working days
Free shipping over 50 €
60-day refund policy
More than 4.7 million customers from all over the world
Delivery within 4-6 working days
Free shipping over 50 €
60-day refund policy
More than 4.7 million customers from all over the world
Delivery within 4-6 working days
Free shipping over 50 €
60-day refund policy
More than 4.7 million customers from all over the world
Delivery within 4-6 working days
Free shipping over 50 €
60-day refund policy
More than 4.7 million customers from all over the world

0818 882 208

Free consulting

Start the quiz ➝
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Magdalena Rybarikova - tennis player
Magdalena Rybarikova - tennis player
Star Star Star Star Star
5 / 5

An excellent product that helps me manage my food cravings and maintain my shape.

OK!FatBurn

Dietary supplement with sweetener
Star Star Star Star Star
4.87 / 5
Verified 6652 Verified reviews

Effective formula that helps with weight loss

  • Inhibits up to 77% of enzymes that digest carbohydrates¹*
  • Inhibits up to 63% of enzymes that digest fats¹*
  • Helps in the removal of fat stores, contributing to weight loss¹
  • Contributes to normal metabolism that produces energy⁴
  • With the added power of L-tyrosine and L-carnitine
  • After 8 weeks, 76% of users claim that ID-alG™ promotes weight loss**
  • 72% would continue using ID-alG™**
* In vitro test of the inhibitory properties of ID-alG™ on pancreatic lipase and bacterial amylase.
** Evaluation of the effect of ID-alG™ on weight regulation in overweight women. A monocentric, randomized, placebo-controlled clinical study conducted in March 2010, with 56 women who used 400 mg of ID-alG™ daily for 8 weeks
Neto 150 g | for 15 days
How to Use

Twice a day, mix 5 g (1 scoop) into a glass of water and drink. It is recommended to consume the drink before main meals. For accurate dosing, we recommend weighing.

Warning:

The recommended daily intake or dosage should not be exceeded. The dietary supplement is not a substitute for a balanced and varied diet. Keep out of reach of children! Use during pregnancy and breastfeeding is not recommended.

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

Key Ingredients

OK!FatBurn – dietary supplement with sweetener.

Tapioca starch, sweetener erythritol, vitamin C (ascorbic acid), ID-alG™ [(seaweed extract (Ascophyllum nodosum), powdered grape extract (Vitis vinifera, seeds)], lemon flavor (4%), L-carnitine, L-tyrosine, stabilizer: cellulose, beetroot concentrate (maltodextrin, beetroot powder (Beta vulgaris)) (1.5%), Sweetener: steviol glycosides from stevia.

Nutritional Value
Per 5g
Vitamin C 250 mg (312% NRV*)
ID-alG™ 200 mg
L-carnitine 150 mg
L-tyrosine 100 mg
*NRV = Daily Value
Certifications

Why Independent Testing Is Essential

At Nature’s Finest, we believe that well-being starts with trust. Here’s what our testing covers:
  • Ingredient Accuracy: We check that the nutrients listed on our labels are present in the exact amounts promised.
  • Purity and Integrity: Each product is tested for the presence of substances such as heavy metals (including mercury, lead, and arsenic), common allergens (such as soy, milk, nuts, and gluten), and microbiological threats like E. coli and salmonella.
  • Nutrient Verification: We confirm the presence and effectiveness of both macro and micronutrients.
Explore our certification IFS Food Standard—the highest level of quality assurance in the industry—and discover why Nature’s Finest stands above the competition. View the certificate here.
31,90€
-0%
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 4-6 business days
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Questions? Call us: 0818 882 208

Reviews

4.87
★ ★ ★ ★ ★
Based on 6,652 reviews
5★
6,079
4★
397
3★
87
2★
40
1★
49
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Everything you need to know:

Which ingredient helps block the absorption of fats and carbohydrates?

ID-alG™ is a patented extract of brown seaweed that blocks a number of enzymes that digest carbohydrates and fats. This reduces the absorption of fats and carbohydrates and contributes to noticeable weight loss.¹

What makes this weight loss formula so effective?

OK!Fatburn is an effective weight loss formula that inhibits enzymes for carbohydrate and fat digestion with the help of ID-alG™. The triple effect of the formula contributes to normal metabolism that produces energy⁴, with the added power of L-tyrosine and L-carnitine. Studies confirm noticeable weight loss associated with a reduction in fat mass.¹

How do digestive enzymes affect weight loss?

90% of lipid (fat) intake is hydrolyzed by lipases, while carbohydrates are mostly digested by amylases. ID-alG™ inhibits amylase and lipase, meaning it reduces the absorption of carbohydrates and fats from the nutrients you consume.¹

What can I expect from using OK!Fatburn?

Studies show that 76% of users believe that ID-alG™ promotes weight loss, and 72% would continue using ID-alG™. Users notice visible effects after 8 weeks of use, with a noticeable reduction in carbohydrate absorption. Users report weight loss with the OK!Fatburn product, and their statements demonstrate the product’s effectiveness.¹

Our customers also confirm it works

star star star star star 4.9 / 5
Lilly
star star star star star 5/5

An excellent product to help with weight loss. I needed a little help with my body shape before vacation, and I assure you, it really works :)

Lilly
Eve
star star star star star 5/5

OK!FatBurn really works! Of course, I love working out, so the results are even better :)

Eve
Maya
star star star star star 5/5

With OK!FatBurn, I’ve lost a significant amount of weight, it’s incredible, and I keep receiving compliments!

Maya
Monica
star star star star star 5/5

I’ve been drinking it for over two months, and my colleagues say I’ve noticeably lost weight.

Monica
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Most people find it difficult to give up carbohydrates and fats when trying to lose weight.

With OK!Fat Burn, you can achieve results even if your diet is not “perfect”.

ID-alG™ – Patented extract of brown seaweed for weight management

ID-alG™ is a unique, patented extract of brown seaweed that contributes to weight control.

Its effectiveness comes from natural compounds called flavonoids that inhibit the activity of two main digestive enzymes:

  • Lipase – the enzyme that digests fats
  • Amylase – the enzyme that digests carbohydrates

 

By blocking a large portion of both enzymes, ID-alG™ helps reduce the absorption of carbohydrates and fats – nutrients that make up more than 85% of daily caloric intake.

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Product option image
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Blocks more than half of the enzymes for carbohydrate digestion¹

ID-alG™, a patented extract of brown seaweed, reduces the activity of amylase. Amylase is the enzyme that digests carbohydrates.¹

Feature icon

Blocks more than half of the enzymes for fat digestion¹

ID-alG™ also helps limit the activity of lipase, the enzyme that digests fats.¹

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Results confirmed by studies

Studies have shown that ID-alG™ supports weight loss, closely associated with a reduction in fat mass, and supports fat reduction with long-term use over 16 weeks.¹

Feature icon

User satisfaction

Previous surveys assess user satisfaction:

  • 76% of users believe that ID-alG™ promotes weight loss**
  • 72% of users would continue using ID-alG™**
  • 72% of users would purchase ID-alG™**

** Evaluation of the effect of ID-alG™ on weight regulation in overweight women. A monocentric, randomized, placebo-controlled clinical study conducted in March 2010, with 56 women who used 400 mg of ID-alG™ daily for 8 weeks

All you need is 3 minutes a day.

A smarter way to support a better lifestyle

Step 1:

Mix one scoop of OK!FatBurn with 200 ml of water.

Step 2:

Stir well until fully dissolved (1 minute).

Step 3:

Drink twice a day, with a meal or on an empty stomach.

Product option image

Reasons why you should start taking OK!Fatburn today

If you start taking OK!Fatburn TODAY:

  • Contribute to weight loss¹
  • Reduce the absorption of fats and carbohydrates with ID-alG™¹
  • Support the reduction of body fat¹
  • Enjoy a tasty ritual for better well-being
  • Instantly boost your confidence

If you start taking OK!Fatburn later:

  • You’ll miss important progress in weight loss
  • You’ll miss out on the reduction of fat and carbohydrate absorption
  • You’ll miss progress in improving body shape

Made from quality ingredients

ID-alG™

1. ID-alG™

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

L-carnitine

2. L-carnitine

L-carnitine is an amino-acid derivative that plays a key role in fat metabolism in the body. It is a natural compound produced by the body and can also be obtained from certain foods and dietary supplements.

L-tyrosine

3. L-tyrosine

L-tyrosine contributes to the normal synthesis of catecholamines, including adrenaline, noradrenaline, and dopamine.

Vitamin C

4. Vitamin C

Vitamin C helps protect cells from oxidative stress, supports the nervous and immune systems, and helps reduce 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

Sorgfältig ausgewählte, reine Formulierung.

Carefully selected, pure formulation

Environmentally friendly packaging.

Less waste, more care for the planet

Third-party tested according to verified standards.

60-days-Money-back-Badge-Landing_EN-white-300x300-1.png

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.

OK!FatBurn

OK!FatBurn

star star star star half star 4.87 / 5 check icon Verified reviews (6652)

Enjoy your favorite dishes without guilt and lose weight!

  • With the power of ID-alG™, it helps in the elimination of fat deposits¹
  • Consequently, it contributes to a reduction in body weight¹
  • Studies show weight and fat loss¹
  • Added power of L-tyrosine and L-carnitine
  • Visible effect after 8 weeks of use¹

Frequently asked questions from our users

FAQ

How and why does it work?

With the active ingredient ID-alG™, it has been proven to help in the loss of body fat and thus body weight. ID-alG™ is an extract of brown seaweed that inhibits the activity of two main digestive enzymes, lipase and amylase.

FAQ

Who is it intended for?

It is intended for anyone who wants to lose excess weight and fat and has difficulty with diets or reducing calorie intake.

FAQ

What ingredients does it contain?

Vitamin C (ascorbic acid), ID-alG™, natural lemon flavor, L-carnitine, L-tyrosine, natural beetroot color (1.5%), sweetener steviol glycosides.

FAQ

What does it taste like?

OK!FatBurn has a refreshing lemon flavor.

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 4-6 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.

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Magdalena Rybarikova - tennis player
Magdalena Rybarikova - tennis player
Star Star Star Star Star
5 / 5

An excellent product that helps me manage my food cravings and maintain my shape.

OK!FatBurn

Dietary supplement with sweetener
Star Star Star Star Star
4.87 / 5
Verified 6652 Verified reviews

Effective formula that helps with weight loss

  • Inhibits up to 77% of enzymes that digest carbohydrates¹*
  • Inhibits up to 63% of enzymes that digest fats¹*
  • Helps in the removal of fat stores, contributing to weight loss¹
  • Contributes to normal metabolism that produces energy⁴
  • With the added power of L-tyrosine and L-carnitine
  • After 8 weeks, 76% of users claim that ID-alG™ promotes weight loss**
  • 72% would continue using ID-alG™**
* In vitro test of the inhibitory properties of ID-alG™ on pancreatic lipase and bacterial amylase.
** Evaluation of the effect of ID-alG™ on weight regulation in overweight women. A monocentric, randomized, placebo-controlled clinical study conducted in March 2010, with 56 women who used 400 mg of ID-alG™ daily for 8 weeks
Neto 150 g | for 15 days
How to Use

Twice a day, mix 5 g (1 scoop) into a glass of water and drink. It is recommended to consume the drink before main meals. For accurate dosing, we recommend weighing.

Warning:

The recommended daily intake or dosage should not be exceeded. The dietary supplement is not a substitute for a balanced and varied diet. Keep out of reach of children! Use during pregnancy and breastfeeding is not recommended.

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

Key Ingredients

OK!FatBurn – dietary supplement with sweetener.

Tapioca starch, sweetener erythritol, vitamin C (ascorbic acid), ID-alG™ [(seaweed extract (Ascophyllum nodosum), powdered grape extract (Vitis vinifera, seeds)], lemon flavor (4%), L-carnitine, L-tyrosine, stabilizer: cellulose, beetroot concentrate (maltodextrin, beetroot powder (Beta vulgaris)) (1.5%), Sweetener: steviol glycosides from stevia.

Nutritional Value
Per 5g
Vitamin C 250 mg (312% NRV*)
ID-alG™ 200 mg
L-carnitine 150 mg
L-tyrosine 100 mg
*NRV = Daily Value
Certifications

Why Independent Testing Is Essential

At Nature’s Finest, we believe that well-being starts with trust. Here’s what our testing covers:
  • Ingredient Accuracy: We check that the nutrients listed on our labels are present in the exact amounts promised.
  • Purity and Integrity: Each product is tested for the presence of substances such as heavy metals (including mercury, lead, and arsenic), common allergens (such as soy, milk, nuts, and gluten), and microbiological threats like E. coli and salmonella.
  • Nutrient Verification: We confirm the presence and effectiveness of both macro and micronutrients.
Explore our certification IFS Food Standard—the highest level of quality assurance in the industry—and discover why Nature’s Finest stands above the competition. View the certificate here.
31,90€
-0%
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 4-6 business days
visa mastercard american_express paypal

Questions? Call us: 0818 882 208

Customer reviews

Customer Reviews

★ ★ ★ ★ ★
6,652
Verified reviews
4.9/5
Previous
★ ★ ★ ★ ★
Published 3 months ago by: Siobhan Tynan
Excited to try these products
★ ★ ★ ★ ★
Published 4 months ago by: Alan Archbold
Great ordering experience
★ ★ ★ ★ ★
Published 4 months ago by: Diane Duffy
5 Star
★ ★ ★ ★ ★
Published 6 months ago by: Michelle Curtin
Excellent
★ ★ ★ ★ ☆
Published 7 months ago by: Yvonne Cassidy
Great love the products will buy again.
★ ★ ★ ★ ★
Published 1 year ago by: Naveed Suleman
Good customer service on phone, now awaiting my order.
★ ★ ★ ★ ★
Published 1 year ago by: Nicole Edwards
Fabulous looking forward to receiving my parcel and going on my new journey
★ ★ ★ ★ ★
Published 1 year ago by: Derrick Quelch
Easy to use
★ ★ ★ ★ ★
Published 1 year ago by: Joan Collins
Very happy with your products feel much healthier, sleeping better also has helped me lose weight.
★ ★ ★ ★ ★
Published 1 year ago by: Nick Naylor
Fantastic!
★ ★ ★ ★ ★
Published 1 year ago by: Izabela Gaszek
I hope it will cleanse (detox) my body and at the same time I will lose some weight :)
★ ★ ★ ★ ★
Published 1 year ago by: Amy Hooper
Just ordered- cant wait to try it out!
★ ★ ★ ★ ★
Published 1 year ago by: Karen Coleman
Only just ordered. Site was eady to navigate.
★ ★ ★ ★ ★
Published 1 year ago by: Brigid Mulholland Mulholland
Can’t wait to try this - hope order arrives soon 🤞🏻
★ ★ ★ ★ ★
Published 1 year ago by: Andrea Hazova
I was happy with all of my purchases and service! Can't wait to get this order.
★ ★ ★ ★ ★
Published 1 year ago by: Ken MacDonald
Quality goods and service which is reason I have returned for more
★ ★ ★ ★ ★
Published 1 year ago by: Philip Coates
Great information on the site fast ordering process
★ ★ ★ ★ ★
Published 1 year ago by: Linda Sutcliffe
My second order I have been using the liver cleanse for two weeks now and I feel so much healthier, I’m sleeping better and I definitely don’t feel as bloated . This is the first time I’ve ever ordered a second time from any products I’ve tried and it’s great to find something that actually does what it says on the tin!
★ ★ ★ ★ ★
Published 1 year ago by: Janet Elston
Very easy to order.
★ ★ ★ ★ ★
Published 1 year ago by: Mrs jennifer Mccartan #25
Brilliant service the wee girl was just brilliant sorted it all out and got my discount thank you 😊 🙏
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Twice a day, mix 5 g (1 scoop) into a glass of water and drink. It is recommended to consume the drink before main meals. For accurate dosing, we recommend weighing.

Warning:

The recommended daily intake or dosage should not be exceeded. The dietary supplement is not a substitute for a balanced and varied diet. Keep out of reach of children! Use during pregnancy and breastfeeding is not recommended.

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

OK!FatBurn – dietary supplement with sweetener.

Tapioca starch, sweetener erythritol, vitamin C (ascorbic acid), ID-alG™ [(seaweed extract (Ascophyllum nodosum), powdered grape extract (Vitis vinifera, seeds)], lemon flavor (4%), L-carnitine, L-tyrosine, stabilizer: cellulose, beetroot concentrate (maltodextrin, beetroot powder (Beta vulgaris)) (1.5%), Sweetener: steviol glycosides from stevia.

Per 5g
Vitamin C 250 mg (312% NRV*)
ID-alG™ 200 mg
L-carnitine 150 mg
L-tyrosine 100 mg
*NRV = Daily Value

Customer Reviews

  1. Sarah C. –

    I have purchased the bio detox and liver cleanse very happy with my purchase just making my second order.

  2. Michael W. –

  3. Jennnifer J. –

    We have started the liver cleanse and Detox and are already feeling the benefit.

  4. Kirsty C. –

  5. Andy D. –

  6. Robert w. –

  7. Rebecca H. –

    I'm enjoying the purchase bundle that I purchased from you..I have much more energy than I used to have and I don't sweat like I did..so thank you

  8. Allen C. –

    Good

  9. JOY-DAVID P. –

    Awesome and trusted

  10. stephen m. –

    Easy to order this detox bundle. I’ve ordered the night time fat burn previously and found it very good for helping me sleep better (night shift worker) so looking forward to seeing results with this detox bundle

  11. Helen r. –

  12. Nerijus K. –

    Very good

  13. Rosaleen G. –

    I am very happy with my purchase

  14. Pheba P. –

    Good product

  15. Claire A. –

    Brilliant service & speedy delivery. Great product too

  16. Ellis H. –

  17. Joanne R. –

    On my second tub and I can feel the difference . I'm feeling overall so much better will definitely keep this up

  18. Zilvinas B. –

    The Products are awesome! Delivery can be faster.

  19. Michelle S. –

    Been taking this for a week and a half now and what a difference round my stomach.. so so much bloating gone I feel comfy. I'm not as tired anymore

  20. Kors L. –

    1 month and i see results. Ordering again.

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.

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