Why us?

Delivery within 4-6 working days
Free shipping over 50 €
60-day refund policy
Trusted by over 3M subscribers
Delivery within 4-6 working days
Free shipping over 50 €
60-day refund policy
Trusted by over 3M subscribers
Delivery within 4-6 working days
Free shipping over 50 €
60-day refund policy
Trusted by over 3M subscribers
Delivery within 4-6 working days
Free shipping over 50 €
60-day refund policy
Trusted by over 3M subscribers

0818 882 208

Free consulting

-25%
Magdalena Rybarikova - tennis player
/ 5
Verified user

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

OK!FatBurn

Dietary supplement with sweetener
4.87 / 5
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
Net 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.

Warnings:

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% DV*)
ID-alG™ 200 mg
L-carnitine 150 mg
L-tyrosine 100 mg
*DV = Daily Value
Certification +

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.

Magdalena Rybarikova - tennis player
/ 5
Verified user

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

23,93 31,90
Subscribe & save
One-time purchase

Switch to subscription and save 1,14
You can get the same for just 22,79. A convenient way to enjoy the best prices. You can change or cancel your subscription at any time!

Money-back guarantee for 60 days
Free shipping for orders from 50,00
Delivery within 4-6 working days
visa
mastercard
american_express
paypal

Questions? Call us: 0818 882 208

Reviews

4.9
Based on 6652 reviews
5 ★
6079
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 that it works

4.9 / 5

Lilly
starstarstarstarstar5/5

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
starstarstarstarstar5/5

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

Eve
Maya
starstarstarstarstar5/5

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

Maya
Monica
starstarstarstarstar5/5

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

Monica
Prev
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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.

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

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

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

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™**

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.

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.

Prev
Next
Traceability of our raw materials

Discover the nature in our supplements! We carefully select and monitor every ingredient to ensure optimal performance, backed by proven scientific effectiveness. Our commitment to transparent traceability guarantees the integrity and excellence of all the elements in our products. Our products are IFS Standard certified under registration no.: 00063/0 and ECO certificat under certified no.: EPR-26420/22-1.

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 and we will refund your money.
-25%
OK!FatBurn

OK!FatBurn

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 Icon

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 Icon

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 Icon

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 Icon

What does it taste like?

OK!FatBurn has a refreshing lemon flavor.

FAQ Icon

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 Icon

What if I don't like it?

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

Previous
Next
-25%
Magdalena Rybarikova - tennis player
/ 5
Verified user

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

OK!FatBurn

Dietary supplement with sweetener
4.87 / 5
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
Net 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.

Warnings:

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% DV*)
ID-alG™ 200 mg
L-carnitine 150 mg
L-tyrosine 100 mg
*DV = Daily Value
Certification +

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.

Magdalena Rybarikova - tennis player
/ 5
Verified user

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

23,93 31,90
Subscribe & save
One-time purchase

Switch to subscription and save 1,14
You can get the same for just 22,79. A convenient way to enjoy the best prices. You can change or cancel your subscription at any time!

Money-back guarantee for 60 days
Free shipping for orders from 50,00
Delivery within 4-6 working days
visa
mastercard
american_express
paypal

Questions? Call us: 0818 882 208

Customer reviews

6,652
reviews for this product
4.9/5
Posted 1 week ago by Diane Duffy

5 Star

Posted 2 years ago by Kim M.
Posted 2 months ago by Michelle Curtin

Excellent

Posted 8 months ago by Naveed Suleman

Good customer service on phone, now awaiting my order.

Posted 9 months ago by Nicole Edwards

Fabulous looking forward to receiving my parcel and going on my new journey

Posted 10 months ago by Derrick Quelch

Easy to use

Posted 10 months ago by Joan Collins

Very happy with your products feel much healthier, sleeping better also has helped me lose weight.

Posted 10 months ago by Nick Naylor

Fantastic!

Posted 10 months ago by Izabela Gaszek

I hope it will cleanse (detox) my body and at the same time I will lose some weight :)

Posted 10 months ago by Amy Hooper

Just ordered- cant wait to try it out!

Posted 10 months ago by Karen Coleman

Only just ordered. Site was eady to navigate.

Posted 10 months ago by Brigid Mulholland Mulholland

Can’t wait to try this - hope order arrives soon 🤞🏻

Posted 10 months ago by Andrea Hazova

I was happy with all of my purchases and service! Can't wait to get this order.

Posted 10 months ago by Ken MacDonald

Quality goods and service which is reason I have returned for more

Posted 11 months ago by Philip Coates

Great information on the site fast ordering process

Posted 11 months 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!

Posted 3 months ago by Yvonne Cassidy

Great love the products will buy again.

Posted 2 years ago by Nigel E.

A good product that seems to be working for me

Posted 2 years ago by Dave B.

Five star brilliant great stuff

Posted 2 years ago by Orgest Q.

Product it's ok

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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% DV*)
ID-alG™ 200 mg
L-carnitine 150 mg
L-tyrosine 100 mg
*DV = Daily Value

Customer Reviews

  1. ALINA G.

  2. C. R.

    Was very sceptical at first but in the first week lost 3.2kg

  3. kelven o.

  4. tina p.

    Love all my orders and works very well

  5. Peter M.

    It’s a little early to be fair

  6. MRS DONOVAN E B.

  7. Lina C.

    I love all the products

Why choose Nature`s Finest?

15

years of tradition

400+

unique products

50+

patented active ingredients

3mil+

satisfied customers

Natural

We believe in the perfection of nature. Our commitment extends to responsible sourcing of raw materials, including sustainability, ethics, and fair business principles. We prioritize eco-friendly packaging to reduce our carbon footprint.

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

Nature offers effective solutions for many challenges we face. Our experienced development team uses and combines these exceptional substances in our products so that the body can best utilize them. Active ingredients in our products are present in proven effective amounts, not just in small and negligible percentages.

Our products are tested through various user studies and trials that ensure their safety and effectiveness. We always listen carefully to the feedback from our customers and consider their opinions, criticisms, and suggestions to ensure that our products are truly tailored to their needs.

Meet our development experts

We are proud to have only the best experts in the field of nutrition and food supplements on our team, who ensure the development and exceptional quality of our products. With outstanding dedication, they lead studies and research and collaborate with external laboratories, inspection bodies, and other experts to ensure the highest quality and safety of our products.

With rich experience and professional knowledge of the industry, our experts strive to provide Nutrisslim customers with the most innovative products, thus maintaining its status as one of the leading companies in the field of nutrition and food supplements.

Meta Bizjak

M.Sc. Nutrition Engineering

Pia Fistrovič

Food and Nutrition Engineer

#WeAreNature

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

For more than 15 years, Nature’s Finest has been dedicated to offering natural solutions for those who wish to overcome challenges and discomforts through a lifestyle. We use only 100% natural ingredients, traditionally grown without additives or unnecessary processing. Whenever possible, we use ingredients from organic farming, supported by the SI-EKO-001 certificate.

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