How to Read a Protein Label？

Two protein powders can look identical on the front of the bag and be completely different products. Almost everything that distinguishes them is on the back. Here is how to read it.

1. Ingredients are listed in order of weight

On a Canadian label, ingredients must appear in descending order of proportion by weight. The first ingredient is the largest component, and anything near the end is present in a small amount.

That single rule answers a lot of questions. If a sweetener or a gum appears before the protein source, you are looking at a flavouring product with protein in it.

2. A blend without a ratio is an unknown

Many plant-based protein powders rely on a pea and rice blend, because each one is limiting in a different amino acid — pea in methionine, rice in lysine. Done properly, the combination works.

The catch is that most brands do not publish the ratio of the blend or a full amino acid profile. Without those, you cannot tell from the label alone how the combination actually performs. Ask for both. A brand that tests its product can produce them.

3. “Source of protein” means something specific in Canada

This is where Canadian labels differ from American ones, and most shoppers have never been told.

To claim “source of protein” in Canada, a food must have a protein rating of 20 or more determined by Health Canada’s Official Method FO-1, or a rating of 8 or more using the PDCAAS method.

The FO-1 protein rating is built on the Protein Efficiency Ratio (PER), a bioassay measuring weight gain per gram of protein consumed in growing rats, scaled against casein as the reference. The rating then multiplies the adjusted PER by the grams of protein in a reasonable daily intake.

The practical consequence: a Canadian protein claim reflects both the quality of the protein and how much of it you would realistically eat — not just the number of grams per scoop.

4. PDCAAS, DIAAS, and which one you are looking at

If a brand quotes a score, check which one. They are not interchangeable, and a value quoted without naming the method is not telling you much.

5. Isolate, concentrate, hydrolysate

These describe how far the protein was refined. Isolates are the most processed and typically the highest in protein per gram; concentrates retain more of the original material. Neither is automatically better — but they are different products, and the label should say which one you are buying.

6. Check the serving size before the protein number

The grams of protein on the front of a bag are per serving, and serving sizes are not standardised between brands. A 40 g scoop and a 25 g scoop are not comparable, however similar the protein figures look.

The fix takes ten seconds: divide protein per serving by the serving size to get protein per gram of powder. That number is comparable across every product on the shelf, and it is often where two similar-looking bags diverge.

A checklist you can use in the aisle

• Is the protein source the first ingredient?
• If it is a blend, is the ratio published?
• Is a full amino acid profile available on request?
• Does it say isolate, concentrate or hydrolysate?
• If a protein score is quoted, is the method named?
• Is there third-party testing, and can you see a report?

We built our labelling around that last question. Every batch of YuAchieve plant-based protein goes through SGS testing, and we would rather you check than take our word for it.