The short answer. There isn't much data on Yeast Extract yet — 8 mentions, 2 with a clear outcome — so treat these numbers as anecdotal. It is well studied — 3 meta-analyses on PubMed.
Out of 8 mentions; the other 75% didn't say how it went and aren't counted.
Of the people who reported each effect, the share who said it got better.
Systematic reviews and meta-analyses from PubMed, with their published conclusions.
3+ meta-analyses or systematic reviews and 10+ randomized controlled trials in humans. The grade measures how much human research exists — read the conclusions below for what it found.
Conclusion: It defines NaCl reduction and considers the methods used for this purpose, especially the use of flavor enhancers (yeast extract, taste peptides, and odor compounds). © 2022 Society of Chemical Industry.
PubMed 35266156 ↗Conclusion: This study therefore identifies hypo-collagenesis as the unique parameter predicting anti-aging cosmeceutical treatment outcome. These findings provide a basis for future cosmetic testing and the potential development of custom formula skin care.
PubMed 23725304 ↗Conclusion: rouxii (86.40%), respectively. The results of this study showed that variables such as temperature, yeast, pH and aflatoxin type can be considered as the effective factors in aflatoxin decontamination.
PubMed 33233146 ↗As stated by users — not a recommendation. Follow the label or your doctor.
How often each side effect came up across all reports.
First-hand experiences, quoted verbatim. We show one positive and one negative where both exist.
“I do notice less hunger when I take the yeast extract in the morning, so it does seem to be having an effect.”
“I'm saying I find both individually more helpful than anything else I've tried, and they are a bit different from each other”
User data from public discussions; research from PubMed. Information only, not medical advice — talk to a doctor before starting, stopping or combining anything. Data updated October 3, 2026. How we rate