

This rating was initiated by Nutrabay. We independently purchased Nutrabay Yeast Protein from the open market (Amazon, Batch No: S1YPCC38), with no brand involvement.
Nutrabay Yeast Protein was third-party tested by Unbox Health at up to 3 NABL-accredited, FSSAI-approved labs, and received a rating of A. We rate products on a (D to A+) scale based on their label accuracy, toxicity and nutritional profile (for foods). All ratings are valid for 12 months. The rating went live on 20 May 2026 and its status is Active.
Nutrabay had no influence on this rating. All lab reports are published. Read the full methodology for how we rate Yeast Protein Powders here.
Nutrabay Yeast Protein received a rating of A in Unbox Health’s independent lab testing across label accuracy, safety, and nutritional parameters. Unbox Health rates products from D to A+ after testing every product at multiple accredited labs. We do not share subjective good/bad or pass/fail stamps.
Nutrabay Yeast Protein received a Non-Toxicity Score of 10 out of 10. Unbox Health did not find any safety concerns in our lab tests. This product was lab tested for the following toxic substances: Total Aflatoxins B,G, Total Aflatoxins M1, Lead, Arsenic, Cadmium, Mercury.
Nutrabay Yeast Protein received a Label Accuracy Score of 9.48 out of 10. Unbox Health identified one or more minor label inaccuracies in our lab tests. This product was lab tested for the following parameters: Total Protein, Total Carbs, Total Fat, Isoleucine, Leucine, Valine, Lysine, Methionine + Cysteine, Threonine, Phenylalanine + Tyrosine, Tryptophan, Histidine.
Nutrabay Yeast Protein received a Nutritional Profile Score of 8.62 out of 10. Based on established nutritional guidelines, Unbox Health determined that this product has a decent nutritional profile.