Protein Powder

Protein powder is not one product category.

Whey, casein, soy, pea and other protein powders can have different formulations and nutritional profiles.

Compare protein per serving alongside the serving size, the protein source, the added ingredients, and the carbohydrate, sugar and fat figures. Sláinte helps you compare what is actually in the tub.

What should you compare?

Protein per serving

Look beyond the headline number and check the serving size.

Protein source

The source can help explain the formulation.

Added ingredients

Flavourings, sweeteners, thickeners, emulsifiers and other ingredients can vary.

Carbohydrates and sugars

These can differ significantly between products.

Fat

Check total and saturated fat where relevant.

Instructions and warnings

Product instructions and label warnings are part of the picture.

A higher protein percentage is not the only factor

The right product depends on why someone is using protein powder, their diet, preferences and the product itself.

Sláinte's role is to make those differences easier to see.

Sources

Last reviewed: August 2026

Compare protein powders.