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Isotonic

Star Star Star Star Star
4.76 / 5
Verified 75 Verified reviews

Instant isotonic drink for increased hydration and performance during physical activity

Replaces electrolytes lost through sweating, provides easily absorbed carbohydrates for energy and helps with muscle functions

  • Maximum hydration – pre, during & post workout hydration
  • With L-carnitine (500 mg per serving)
  • Substitues electrolytes – contains minerals lost through sweat and helps replenish them to maintain proper electrolyte balance
  • Rapid absorption – replenish fluids and electrolytes more efficiently
  • Crucial vitamins and minerals for performance (Vitamin C, Magnesium, Calcium, B complex)
  • Helps to reduce fatigue ²,³
  • Contributes to electrolyte balance ³
  • Contributes to normal muscle functions and normal protein synthesis ³
  • Contributes to maintaing immune system function during and after intense physical exercise ²
  • Delicious and refereshing orange taste

Get more energy and sufficient hydration to make the most of your exercise and day!

Neto 400 g | for 20 days
How to Use

Mix 20 g (5 scoops) in a glass (500 mL) of water and drink before or during exercise. Weighing is recommended for accurate dosing.

Warning:

The recommended daily amount or dose must not be exceeded. A nutritional supplement is not a substitute for a balanced and varied diet. Consumption during pregnancy and breastfeeding is not recommended. Store in a dry and cool place. Keep out of reach of children!

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.

Key Ingredients

Isotonic

Ingredients: maltodextrin, glucose, dextrose, vitamin C (ascorbic acid), magnesium citrate, natural orange flavor, stabilizer: cellulose, calcium citrate, L-carnitine, rock salt, B-complex (thiamine mononitrate, riboflavin, pyridoxine hydrochloride, cyanocobalamin, folate acid, calcium-D pantothenate, nicotine amide), Sweetener: steviol glycosides from stevia

Nutritional Value
Nutritional values per 20 g
Vitamin C 2000 mg (2500% NRV*)
Magnesium citrate 150 mg (40% NRV*)
Calcium citrate 125 mg (15% NRV*)
L-carnitine 500 mg
B-complex 50 mg
– Vitamin B1 1,1 mg (100% NRV)
– Vitamin B2 1,4 mg (100% NRV)
– Vitamin B6 1,4 mg (100% NRV)
– Vitamin B1 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

£9.43 £11.79
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Subscription
One-time purchase

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

Reviews

4.76
★ ★ ★ ★ ★
Based on 75 reviews
5★
66
4★
6
3★
0
2★
0
1★
3
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Our customers also confirm it works

star star star star star 4.9 / 5
Catherine
star star star star star 5/5

I have been using Isotonic for my workouts for a few weeks now and I have to say I am really impressed with the results. It keeps me hydrated throughout my workout and I don't feel tired or fatigued like I used to. I also love the added vitamins and minerals that help support my immune system. Overall, great product!

Catherine
Mark
star star star star star 5/5

As someone who plays sports regularly, I need to make sure I am properly hydrated and my electrolytes are in balance. Isotonic has been a game changer for me. It keeps me energized and helps me recover faster after an intense game. I also love the added L-carnitine which helps with muscle function.

Mark
Annie
star star star star star 5/5

I recently started a new job which requires a lot of physical activity and I was struggling to keep up with the demands of the job. Isotonic has been a lifesaver for me. It keeps me hydrated and provides the energy I need to get through the day. I also love that it has added vitamins and minerals that contribute to normal psychological functions. I feel more focused and alert throughout the day.

Annie
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Made from quality ingredients

L-Carnitine

1. 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.

Vitamin C

2. 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.

Magnesium

3. Magnesium

Magnesium contributes to the normal functioning of the nervous system, muscle function, normal energy-yielding metabolism, and also contributes to electrolyte balance.

Calcium

4. Calcium

Calcium is an essential mineral that contributes to normal muscle function, to normal function of digestive enzymes and to maintenance of normal bones and normal teeth.

B-complex

5. 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.

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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.

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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.

-20%
Isotonic

Isotonic

star star star star half star 4.76 / 5 check icon Verified reviews (75)

Stay hydrated and reach your full potential.

  • Tasty and refreshing orange flavour
  • No added sugar, no artificial sweeteners, colours or preservatives
  • Maximum hydration - before, during and after exercise
  • With L-Carnitine (500 mg per serving)
  • Replaces electrolytes - contains minerals lost through sweating during exercise and helps to restore them to maintain the correct electrolyte balance
  • Fast absorption - more efficient fluid and electrolyte replenishment

Frequently asked questions from our users

FAQ

How and why does it work?

Providing a balanced blend of carbohydrates, essential vitamins, minerals, electrolytes and fluids to support hydration and maintain optimal performance during physical activity, it is the perfect rehydration drink for all activities. With added L-Carnitine for maximum energy efficiency!

FAQ

For whom is the product suitable?

Isotonic is suitable for anyone who is active and wants to take their training or performance to the next level. It replaces lost electrolytes and supports muscle function.

FAQ

What ingredients does it contain?

Maltodextrin, glucose, dextrose, vitamin C, magnesium citrate, natural orange flavour, stabiliser: cellulose, calcium citrate, L-carnitine, rock salt, B-complex, sweetener: steviol glycoside.

FAQ

What does it taste like?

Isotonic has a pleasant and refreshing orange flavour.

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
Next
-20%

Isotonic

Star Star Star Star Star
4.76 / 5
Verified 75 Verified reviews

Instant isotonic drink for increased hydration and performance during physical activity

Replaces electrolytes lost through sweating, provides easily absorbed carbohydrates for energy and helps with muscle functions

  • Maximum hydration – pre, during & post workout hydration
  • With L-carnitine (500 mg per serving)
  • Substitues electrolytes – contains minerals lost through sweat and helps replenish them to maintain proper electrolyte balance
  • Rapid absorption – replenish fluids and electrolytes more efficiently
  • Crucial vitamins and minerals for performance (Vitamin C, Magnesium, Calcium, B complex)
  • Helps to reduce fatigue ²,³
  • Contributes to electrolyte balance ³
  • Contributes to normal muscle functions and normal protein synthesis ³
  • Contributes to maintaing immune system function during and after intense physical exercise ²
  • Delicious and refereshing orange taste

Get more energy and sufficient hydration to make the most of your exercise and day!

Neto 400 g | for 20 days
How to Use

Mix 20 g (5 scoops) in a glass (500 mL) of water and drink before or during exercise. Weighing is recommended for accurate dosing.

Warning:

The recommended daily amount or dose must not be exceeded. A nutritional supplement is not a substitute for a balanced and varied diet. Consumption during pregnancy and breastfeeding is not recommended. Store in a dry and cool place. Keep out of reach of children!

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.

Key Ingredients

Isotonic

Ingredients: maltodextrin, glucose, dextrose, vitamin C (ascorbic acid), magnesium citrate, natural orange flavor, stabilizer: cellulose, calcium citrate, L-carnitine, rock salt, B-complex (thiamine mononitrate, riboflavin, pyridoxine hydrochloride, cyanocobalamin, folate acid, calcium-D pantothenate, nicotine amide), Sweetener: steviol glycosides from stevia

Nutritional Value
Nutritional values per 20 g
Vitamin C 2000 mg (2500% NRV*)
Magnesium citrate 150 mg (40% NRV*)
Calcium citrate 125 mg (15% NRV*)
L-carnitine 500 mg
B-complex 50 mg
– Vitamin B1 1,1 mg (100% NRV)
– Vitamin B2 1,4 mg (100% NRV)
– Vitamin B6 1,4 mg (100% NRV)
– Vitamin B1 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

£9.43 £11.79
-20%
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

Customer Reviews

★ ★ ★ ★ ★
75
Verified reviews
4.8/5
Previous
★ ★ ★ ☆ ☆
Published 11 months ago by: iwona swiderska
Thank You ❤️
★ ★ ★ ★ ★
Published 1 year ago by: Alice Zlamalova
Order was simple and quick, very happy
★ ★ ★ ★ ★
Published 7 months ago by: Deana Stratford
All good 👍
★ ★ ★ ★ ★
Published 7 months ago by: Michael Smith
Excellent communication and product
★ ★ ★ ★ ★
Published 4 months ago by: Julie Douglas
Great service, great communication between themselves and me. 5 star service.
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Mix 20 g (5 scoops) in a glass (500 mL) of water and drink before or during exercise. Weighing is recommended for accurate dosing.

Warning:

The recommended daily amount or dose must not be exceeded. A nutritional supplement is not a substitute for a balanced and varied diet. Consumption during pregnancy and breastfeeding is not recommended. Store in a dry and cool place. Keep out of reach of children!

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.

Isotonic

Ingredients: maltodextrin, glucose, dextrose, vitamin C (ascorbic acid), magnesium citrate, natural orange flavor, stabilizer: cellulose, calcium citrate, L-carnitine, rock salt, B-complex (thiamine mononitrate, riboflavin, pyridoxine hydrochloride, cyanocobalamin, folate acid, calcium-D pantothenate, nicotine amide), Sweetener: steviol glycosides from stevia

Nutritional values per 20 g
Vitamin C 2000 mg (2500% NRV*)
Magnesium citrate 150 mg (40% NRV*)
Calcium citrate 125 mg (15% NRV*)
L-carnitine 500 mg
B-complex 50 mg
– Vitamin B1 1,1 mg (100% NRV)
– Vitamin B2 1,4 mg (100% NRV)
– Vitamin B6 1,4 mg (100% NRV)
– Vitamin B1 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

Frequently asked questions from our users

How long can I take it? Can I do the cure?

The product can be taken continuously in moderation as part of a balanced diet.

When is the best time to take it?

I recommend that the product is taken during or after exercise.

Can pregnant women and nursing mothers consume it?

Pregnant and lactating women are discouraged from use.

Is it suitable for vegans?

Yes, the product is suitable for vegans and vegetarians.

Can I take it alongside medication?

Dietary supplements are foods that are intended to supplement your normal diet, if you are taking any medication, consult your personal doctor before taking a dietary supplement.

What can I do if I don't like the taste? And can I mix it with boiling water

If you don’t like the taste, you can mix it into juice, smoothies or dissolve it in more water. We do not recommend consuming this product in hot water as this may destroy the effect of the active ingredients and vitamins.

Can children consume it? From what age can I consume the product?

The product may be consumed by persons over 15 years of age.

Diabetics and other health conditions?

This product contains maltodextrin, which increases blood sugar levels and is therefore not recommended for diabetics and in case of associated conditions, a personal physician should be consulted.

Are there possible side effects?

The product is usually well tolerated and many users report no side effects. However, it is important to understand that each person reacts differently to dietary supplements. Consult a nutritionist or doctor before use, especially if you have any health problems or are taking medication.

Advice from our experts in addition to eating the product?

1. regular physical activity 2. balanced diet 3. quality sleep 4. adequate hydration

Is the product suitable for both women and men?

Yes, the product is suitable for women and men.

Is the product suitable for people with high blood pressure and thyroid problems?

This product is intended for use by everyone, but in the case of existing medical conditions or medication, we recommend that individuals consult their personal physician before use.

Product not well mixed, lumps, contents floating on water?

Clumps are a perfectly normal occurrence in a powder product that absorbs moisture. For a more homogeneous drink, stir vigorously with a shaker.

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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