Electrolyte Drinks

ISOFIT+ is the Ultimate sports drink for Ultimate Hydration.

At THIRSTI we firmly believe that an active lifestyle is a healthy lifestyle. That’s why we developed ISOFIT+, our electrolyte-fuelled range of delicious sports drinks!

With a pH level of 8 and a high mineral content, our Natural Spring water forms the base of the ISOFIT+ range. After that, there’s plenty added goodness! ISOFIT + is high in Vitamins B3, B5, B6 and Vitamin C, and very high in Vitamin B12.

They also contain Calcium, Magnesium and Potassium to make a winning combination in a bottle.
Carbohydrates, the Vitamin B complex, and Vitamin C, provide energy to fuel prolonged activity. Our ISOFIT+ range contains 20g of Carbohydrates and 150g of Sodium in a 500ml bottle and has been scientifically formulated to assist athletes participating in exercise lasting 60 minutes or more.
With four powerful flavours, Berry, Naartjie, Lemon Lime and Blueberry, there’s an ISOFIT+ for everyone!

This is Ultimate Hydration. This is THIRSTI ISOFIT+.


What are electrolytes?

Electrolytes are essential minerals, and ISOFIT+ is packed with them! They help to regulate bodily fluids, maintain normal blood pressure, and support muscle and nerve function.

  • Potassium is a powerhouse that helps every cell in the body use glucose for energy. Without sufficient potassium, muscles get tired sooner, reflexes are slower, and the body can become shaky.
  • Magnesium promotes healthy cell function. It helps muscles use oxygen and glucose – making it critical for strength and endurance.
  • Calcium regulates muscle contractions, allowing increased intensity and duration of exercise.
  • Sodium balances fluids in the body and it influences blood pressure. It helps to send nerve impulses and it is needed for muscle contractions.

What nutritionists are saying about


Listen to what the Sharks Nutritionist, Danielle Roberts, has to say about ISOFIT+ in her chat with Jane Linley-Thomas from East Coast Radio


Interested to read more about Sports Drinks?

We answer your

Frequently asked questions

What are the benefits of drinking electrolytes?

Electrolytes are minerals that help to regulate and control the balance of fluids in your body. These minerals are critical for your health, assisting with regulating blood pressure, muscle contractions and keeping your entire system functioning properly!

When should I drink electrolytes?

You should drink electrolyte drinks prior to exercising, as well as during intervals throughout your physical activity. The easiest way to maintain the electrolyte balance in your body is taking note of your thirst and responding to it by drinking fluids.

What is the best sports drink to replace electrolytes?

The best sports drinks help athletes maintain both a healthy electrolyte balance, and stable blood glucose levels through carbs. ISOFIT+ has been expertly crafted to hydrate athletes during extended periods of physical activity.

What do professional athletes drink?

Professional athletes drink many different products such as protein drinks, alkaline water, and other sports drink alternatives. ISOFIT+ is an electrolyte-fuelled sports drink that athletes drink to rehydrate themselves during long periods of exercise.

What is the quickest way to rehydrate your body?

Dietitians say drinking water is generally the best (and cheapest) way to remain hydrated. Water contains no added sugars or calories, making it ideal to drink throughout the day. However, during a workout, important electrolytes can be lost through sweat and rehydrating with a sports drink, such as ISOFIT+, is ideal to replenish those important minerals such as sodium and potassium.

Should athletes drink electrolytes or water?

The short answer is both. For daily hydration, plain water, which is carb- and sugar-free, is best. During training and long periods of physical exercise, electrolytes need to be replaced and sports drinks, like ISOFIT+, are the ideal choice to rehydrate.

Can I take electrolytes at night?

You can drink electrolyte drinks at night for rehydration but because ISOFIT+ is designed to give you an energy boost it may not be desirable to drink it just before you want to sleep.

Is it good to drink isotonic drinks?

Sweating is a natural bodily function that allows your body to keep its core temperature cool. This can lead to the loss of important minerals and sometimes even dehydration. Isotonic drinks replace those nutrients and fluids quickly and aid in preventing exercise-related injuries and illness.

What happens when your electrolytes low?

An electrolyte imbalance can leave you feeling weak and twitching and your muscle’s cramping. In severe cases, low electrolyte levels may cause seizures, low blood pressure and heart rhythm disturbances.

Can drinking too much water cause electrolyte imbalance?

Overhydration (drinking too much water) can deplete the levels of potassium, sodium, magnesium, phosphate and chloride in your blood, leading to an electrolyte imbalance in your body.

What is the most common electrolyte imbalance?

Hyponatremia, or low sodium, is the most commonly seen type of electrolyte imbalance.