

Don’t be fooled. MB is mixing Yeast Protein in their products.
After my last post, I decided to go back to ordering either Fuel One of MB.
Both Fuel One Whey Iso-Max and MuscleBlaze Biozyme Whey PR list Yeast Protein (extracted from Saccharomyces cerevisiae) as the second ingredient, right after whey. On the MB Biozyme tub, it’s actually sold under a “Protein Blend (80.8%)” label that includes both.
None of this shows up on the front of the pack. Both products are marketed and priced purely as “Whey Protein” / “Whey Isolate” / “Whey PR”, no mention of a blend, no “whey + yeast protein” claim anywhere visible unless you flip the tub and read the ingredients + amino acid panel in fine print.
To be clear on what this isn’t: it’s not illegal. FSSAI requires ingredients listed by descending weight on pack, and they’ve done that - yeast protein is disclosed, just not prominently.
The issue is the gap between what’s marketed (100% whey) and what’s actually in the tub (a whey + yeast protein blend). If you’re paying for whey, you’d probably want to know a chunk of your protein blend is coming from a cheaper source - the info exists, it’s just buried where almost no regular buyer will read.
I think this information should be displayed upfront transparently.
*I have used Claude to help me write & format this