Naturaltein · Reviewed by COREFITLAB · Published 2026-03-07
Based on a review by COREFITLAB (accessed 2026-03-07).
Based on this review alone: buy it if you care about good source of protein for a plant-based option — just accept cannot replace whey protein in terms of bioavailability and results.
The reviewer concludes that both the Chocolate and Thandai flavors of Naturaltein YES Protein passed their independent lab tests for protein content and amino acid profile, finding them proper and genuine products. While acknowledging yeast protein as a viable alternative for specific needs like vegan or lactose-free diets, the reviewer ultimately maintains that whey protein remains superior in bioavailability and overall results.
This video by COREFITLAB provides a detailed review and independent lab test report of Naturaltein's new YES Protein, a fermented yeast isolate protein. The reviewer examines the product's ingredients, nutrition facts, mixability, taste, and verifies its claimed protein content and amino acid profile through lab testing.
Naturaltein 100% YES Yeast Protein is a viable plant-based alternative for specific dietary needs, proving to be genuine and passing independent lab tests for protein content. Both chocolate and Thandai flavors demonstrated good mixability, though they resulted in a high thickness and a taste distinct from whey protein. Lab tests confirmed that both flavors delivered the claimed protein percentages, with no amino spiking or soya detected, validating the product's authenticity. If you require a vegan, lactose-free, or diabetic-friendly protein source, this product is worth considering. However, if you expect the superior bioavailability and results of whey protein, you should look elsewhere.
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The reviewer explains that yeast protein is a fermented yeast isolate protein, derived from processed and dried fungus, offered as a supplement.
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The reviewer states that yeast protein contains higher protein, good amounts of vitamin B complex, is lactose-free, a vegan source, and doesn't cause digestion problems. It also tastes better than other plant proteins.
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The reviewer compares the company's claims: Thandai flavor has 25.7g protein and 2.82g carbs per 35g serving, while Chocolate has 25g protein and 4g carbs per 35g serving.
measurement_testpositivet=3:24–3:30
The reviewer demonstrates weighing the chocolate flavor's serving. The scale shows 35 grams, matching the company's claimed serving size.
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After zeroing the scale, the reviewer scoops the Thandai flavor, which initially measures 32 grams, slightly less than the claimed 35g. The reviewer adds a bit more to reach 35 grams.
hands_on_demopositivet=4:07–4:32
The reviewer mixes the chocolate flavor with 200-300 ml of water for 10-15 seconds. It mixes properly, but the reviewer notes a high thickness.
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The reviewer mixes the Thandai flavor with 200 ml of water for 10-15 seconds. It also mixes properly, indicating good mixability.
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The reviewer tastes the chocolate flavor, describing it as 'okay' and different from whey protein, but confirming the chocolate taste is present.
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The reviewer tastes the Thandai flavor, finding it tasty and describing the taste as similar to cardamom tea. The reviewer prefers the chocolate flavor overall.
measurement_testpositivet=5:50–6:00
The lab test report for the chocolate flavor shows approximately 73% protein on a dry basis, which is higher than the company's claimed 71% (per 100g).
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Another NABL-certified lab test report for the chocolate flavor shows approximately 70% protein on an as-is basis, which also passes when compared to the claimed 71%.
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The amino acid profile for the chocolate flavor is displayed, and the reviewer confirms that the product does not appear to be amino spiked.
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The lab test report for the Thandai flavor shows approximately 75% protein on a dry basis, which is higher than the company's claimed 73% (per 100g).
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The lab test report for the Thandai flavor shows approximately 71% protein on an as-is basis, which also passes compared to the claimed 73%.
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The soya report for the Thandai flavor shows no soya spiking, with detected levels below LQC (Limit of Quantification).
Naturaltein YES Protein is a unique protein supplement made from fermented yeast isolate. It is presented as a valuable alternative to whey protein, especially in the Indian market where whey prices are high, offering a vegan, lactose-free option rich in protein and vitamin B complex.
The reviewer explicitly states that yeast protein is lactose-free, making it suitable for those with lactose intolerance. It is also highlighted as a vegan protein source, appealing to individuals following a plant-based diet.
For the Chocolate flavor, the company claimed ~71% protein (per 100g), and lab tests showed ~73% (dry basis) and ~70% (as-is basis). For the Thandai flavor, the claimed ~73% was verified with lab results of ~75% (dry basis) and ~71% (as-is basis). The lab reports also showed no amino or soya spiking, confirming the quality and authenticity.
The reviewer conducted hands-on mixability tests for both flavors. After shaking with water for 10-15 seconds, both the chocolate and Thandai flavors mixed properly without significant clumps. However, the chocolate flavor resulted in a noticeably high thickness.
In taste tests, the chocolate flavor was found to be 'okay' and possessed a chocolate taste, but was noted to be different from whey protein. The Thandai flavor was described as tasty, reminiscent of cardamom tea. The reviewer personally preferred the chocolate flavor slightly more.
The reviewer directly addresses this, stating that while yeast protein is a proper and genuine alternative, especially for those needing vegan or lactose-free options, no protein source can truly replace the bioavailability and results offered by whey protein.
The reviewer indicates that if a buyer is seeking a protein product within the 1700-1800 INR price range, then Naturaltein YES Protein is a viable option. This suggests it offers good value for its price point as an alternative.
85/100 source quality
COREFITLAB introduces Naturaltein's new YES Protein, highlighting it as a lactose-free, vegan, and digestible alternative to whey protein, which is gaining demand due to rising whey prices. The review covers the claimed protein percentages for Thandai (25.7g per 35g serving) and Chocolate (25g per 35g serving) flavors, and details their respective ingredients. The reviewer performs hands-on tests for scoop accuracy, mixability, and taste for both flavors. Crucially, independent NABL-certified lab test reports are presented, confirming that both products meet or exceed their claimed protein percentages and show no amino or soya spiking. Despite its positive attributes, the reviewer suggests yeast protein cannot fully replace whey.
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This page converts COREFITLAB's review of the Naturaltein Naturaltein 100% YES Yeast Protein into structured evidence — timestamped claims, pros & cons, and buyer questions. It is not the original review and does not replace watching or reading the full source.