Whey Protein Isolate
The favourite choice of athletes and anyone building muscle or managing their weight: pure protein separated from most of the fat and milk sugar (lactose). Its carbohydrate per scoop is almost zero and the glycemic index does not apply; it provides a quick supply of complete amino acids.
Glycemic index
Glycemic load
Calories
Protein
💡 Smart Nutritional Guidance
Consumption advice
Take one scoop mixed with water after exercise or between meals to boost fullness and help preserve muscle while losing fat.
Best preparation methods
Mix it with cold water or unsweetened almond milk in a hand shaker, and avoid very hot water so the protein doesn't clump and lose its smooth texture.
Important Nutritional Note
Whey isolate is a comfortable option even for people with mild lactose intolerance; choose pure products without added sugars or unwanted sweeteners.
Nutrition facts
| Nutrient | Per 100 g | Per typical portion (30 g) |
|---|---|---|
| Calories | 385 kcal | 115.5 kcal |
| Protein | 82 g | 24.6 g |
| Carbohydrate | 7 g | 2.1 g |
| Available carbohydrate | 7 g | 2.1 g |
| Fat | 5 g | 1.5 g |
| Dietary fibre | 0 g | 0 g |
The typical portion is approximate, for comparison purposes.
Comparison & smarter alternatives
It has 385 kcal per 100 g, ranking 5 of 7 in Special ingredients & supplements (lowest first).
Related foods from the same family:
Frequently asked questions
Is Whey Protein Isolate good for weight loss?
It can be a useful part of a weight-loss plan because it provides 21.3 g of protein per 100 kcal, and protein supports fullness. A 30 g portion gives 116 kcal.
How does Whey Protein Isolate affect blood sugar?
Whey Protein Isolate contains only 7 g of available carbohydrate per 100 g, so the glycemic index does not apply and its direct effect on blood sugar is minimal. The meal’s effect depends on what you eat with it, such as bread, rice or sweetened sauces.
What is the nutritional value of a typical portion of Whey Protein Isolate?
A typical 30 g portion of Whey Protein Isolate provides about 116 kcal, 24.6 g protein, 2.1 g carbohydrate, 1.5 g fat and 0 g fibre.
Reviewed by the WiBo Health medical team · Last reviewed 13 October 2026
Disclaimer: This guidance is for nutritional lifestyle orientation and does not constitute a diagnostic medical device under EU Regulation MDR 2017/745.