IsoTonic is an easy-mix isotonic sports drink powder that rapidly hydrates, recharges energy with a three carbohydrate blend and electrolytes, and keeps your performance steady through endurance training. BioTechUSA is a trusted name in sports nutrition, known for quality ingredients and clear, transparent labelling.

Available Sizes & Variants:

600 grams IsoTonic powder - generous size for long sessions.

Benefits & Features:

• Rapidly hydrates during intense training.
• Tri carbohydrate matrix blends fast and sustained energy, helping delay fatigue.
• Replaces electrolytes lost through sweat, supporting muscle function and fluid balance.
• Contains vitamin C and B6 to aid energy metabolism and reduce exercise stress.
• Premium formulation supports rapid hydration and sustained energy across long sessions, and the balanced electrolyte profile helps maintain performance in heat or high intensity, giving you confidence to push harder.

Isomaltulose Palatinose provides a steady energy release, helping fuel long sessions. The tri carbohydrate matrix combines fast and sustained energy, supporting endurance. Sodium plus magnesium and calcium back up fluid balance and muscle function. The product is manufactured in a facility with cross contamination controls for major allergens, underscoring safety and quality. For those used to energy drinks like celsius drinks or white monster energy drink, IsoTonic offers steadier hydration.

Carbohydrate, of which sugars, Dextrose, Sucrose, Isomaltulose (Palatinose), Calcium, Magnesium, Sodium, Vitamin C, Vitamin B6

• GTIN: 5999076238903
• Manufacturer: BioTechUSA
• Size: Lemon Ice Tea
• Categories: BioTechUSA SupplementsIntra Workout SupplementsSports Supplements
• Best buy: 6 - 24 months+

United Kingdom Shipping:

Orders placed by 2pm (Monday to Friday) are dispatched the same day. Orders placed after 2pm will be dispatched the next working day.

Free shipping on orders over £50 to the UK.

Returns: Our products are meant to make you feel healthy and at your best. If you need to return your item, you can do so free of charge within 30 days in the same original and unopened packaging. Subject to T&C's.

Mix 1 serving (30 g = 2 scant measuring spoons = 2 heaped tablespoons) of BioTechUSA IsoTonic powder with 500 ml of water in a shaker. Consume 1 serving during your training, with a maximum of 3 servings per day. Store in a cool, dry, dark place and avoid excessive heat. Keep out of reach of children. A dietary supplement is not a substitute for a balanced, varied diet and a healthy lifestyle.

Please consult the product packaging for accurate instructions on how to use the product.

*Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.

The Active Ingredient Is: Vitamin C (Ascorbic Acid)

Vitamin C, also known as ascorbic acid, is a water-soluble vitamin essential for normal energy metabolism and antioxidant protection during physical activity.

This form is L-ascorbic acid, a common dietary source of vitamin C included to support metabolic processes and antioxidant function during exercise.

What Does Vitamin C Do?

Vitamin C contributes to normal energy-yielding metabolism and supports antioxidant defences, which helps manage exercise-related oxidative stress in line with EFSA guidance.

This nutrient is involved in maintaining normal function during endurance activity, contributing to overall metabolic support as described in regulatory and scientific assessments.

This supplement is not intended to diagnose, treat, cure, or prevent any disease.

BioTechUSA earns its name in sports nutrition for pushing technically focused formulations, and this brand’s IsoTonic line mirrors that heritage with a thoughtfully designed carbohydrate‑electrolyte matrix to support hydration during endurance activity. This mix of fast and steady energy delivery fits with our commitment to evidence‑led product design, which is why BioTechUSA was chosen as our partner for this supplement.

BioTechUSA is a trusted name in sports nutrition, celebrated for quality ingredients and clear product positioning. Their approach to formulating products that support athletic effort fits perfectly with the needs of endurance athletes, while the IsoTonic blend emphasises electrolyte balance and energy provision in a single product. Our team recognised BioTechUSA’s longstanding presence in the sector as a strong indicator of manufacturing discipline and product consistency.

We selected BioTechUSA based on our rigorous internal evaluation process and alignment with our standards for quality and safety. This partnership is reinforced by the transparency of their facility’s cross‑contamination controls for major allergens, and by our commitment to pair trusted brands with strict quality expectations. Learn more about our team and standards through Welzo's healthcare professionals and our ingredient quality and purity standards.