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Isotonic Drinks

Guides and comparisons How to read a supplement label in the EU

Isotonic drink powders to mix with water, sold in tubs and usually flavoured with citrus, tea or other fruit. Isotonic describes the concentration of the finished drink, so the label gives the weight of powder and the volume of water for one serving. Compare the carbohydrate and any added minerals per serving, together with the servings a tub holds.

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Portion prices are calculated from the net contents. Portion sizes differ between products; this is not a dosing recommendation. Read the full ingredients and directions on the product label.

Price per 1 g electrolytes = portion price ÷ declared electrolytes per portion (mg) × 1000.

Keto Electrolyte Powder, Lemon Lime - 369 grams Trace Minerals Keto Electrolyte Powder, Lemon Lime - 369 grams Ionic Electrolytes Liquid Concentrate - 50 ml. KIKI Health Ionic Electrolytes Liquid Concentrate - 50 ml. Collagen Electrolytes Vitality and Sport, Pineapple & Mango - 390 grams Osavi Collagen Electrolytes Vitality and Sport, Pineapple & Mango - 390 grams Electrolyte Hydrate, Lemon Lime - 300 grams Stacker2 Europe Electrolyte Hydrate, Lemon Lime - 300 grams Sports Electrolytes, Blackcurrant - 180 grams MZ Muscle Zone Sports Electrolytes, Blackcurrant - 180 grams
Pack size 369 g 50 ml 390 g 300 g 180 g
Main ingredients Keto electrolyte powder (potassium, magnesium, sea salt) Ionic liquid electrolyte concentrate (chloride, potassium, magnesium) Collagen peptides + 5 electrolytes & B-complex Keto electrolyte powder (potassium, magnesium, sea salt) Keto electrolyte powder (potassium, magnesium, sea salt)
Label portion 6.7 g 2 ml 13 g 7.5 g 3 g
Total electrolytes per label portion 1,130 mg 296.6 mg 1,213 mg 1,289 mg 1,016 mg
Pack price €46.99 €22.99 €36.99 €19.99 €15.99
Price per portion €0.85 €0.92 €1.23 €0.50 €0.27
Price per 1 g electrolytes €0.76 €3.10 €1.02 €0.39 €0.26
Allergen information See the manufacturer’s full allergen statement. See the manufacturer’s full allergen statement. See the manufacturer’s full allergen statement. See the manufacturer’s full allergen statement. See the manufacturer’s full allergen statement.
Certifications cGMP Certified GMP Organic GMP HACCP — —
Label information Label information
Nutrient amount source		 Label information
Nutrient amount source		 Label information Label information Label information

Authorised EU Health Claim (HC-089 • Reg. (EU) 432/2012)

“Magnesium contributes to electrolyte balance”

Conditions of use: The claim may be used only for food which is at least a source of magnesium as referred to in the claim SOURCE OF [NAME OF VITAMIN/S] AND/OR [NAME OF MINERAL/S] as listed in the Annex to Regulation (EC) No 1924/2006.

A varied, balanced diet and a healthy lifestyle are important.

Prices include VAT for Ireland. Courier delivery: €6.99; free from €65.00. Estimated delivery: 2–4 working days.

Product facts checked: 2026-10-28.

Frequently asked questions

What does it mean when a hydration powder is called isotonic?

Mixed as directed, an isotonic drink has a concentration of dissolved particles similar to that of body fluids. That depends on the amount of water, so follow the powder-to-water directions on the label. The word describes the drink, and the nutrition table shows what it contains per serving.

How many drinks does one tub make?

Divide the net weight of the tub by the grams of powder in one serving, which the directions give together with the volume of water. Compare tubs by the price per serving rather than per tub, because the serving size differs between products.

What should I look for in the nutrition table of an isotonic drink?

Look at the carbohydrate and at the salt, which EU labels give in grams. Minerals such as magnesium or potassium, if added, are listed in milligrams and often as a percentage of the nutrient reference value (NRV). Values are given per serving and per 100 g of powder or per 100 ml of the prepared drink, so compare products on the same basis.