Postbiotic trial found no wrinkle advantage over placebo
Wrinkles around the eyes improved in both groups. A separate elasticity finding was exploratory and does not establish a wrinkle benefit.
Based on the published abstract. The full paper may contain additional methods, results and limitations.
The 30-second takeaway
The postbiotic preparation did not outperform placebo on the planned main wrinkle outcomes. Improvements within both groups cannot establish a supplement-specific effect. An elasticity measure differed between groups, but the authors treated that result as exploratory. Comparable safety findings during this trial do not establish safety across longer use or other populations.
Several secondary outcomes were tested without adjustment for multiple comparisons. The authors describe the elasticity difference as small and exploratory; the abstract alone cannot establish its practical importance.
What researchers found
Primary crow's-feet wrinkle outcomes
Postbiotic versus placebo at week 12, assessed through investigator grading and PRIMOSlite measurements. The abstract gives no numerical between-group effect estimate.
What the main test measured
The planned main outcome was change in crow's-feet wrinkles, evaluated through investigator ratings and PRIMOSlite measurements. Improvements within each group did not translate into an advantage for the postbiotic over placebo.
An elasticity signal remains uncertain
An overall elasticity measure differed between groups, while other skin measures improved in both. Because these secondary tests lacked adjustment for multiple comparisons, the isolated elasticity result needs confirmation before supporting a broader claim.
The original publication
Effects of Heat-Killed Lactobacillus acidophilus IDCC 3302 on Skin Aging Parameters: A Randomized, Double-Blind, Placebo-Controlled Trial in Healthy Adults.
Kim H, Bang WY, Jeong KH et al.
Nutrients · 2026
- PubMed ID
- 41754111
- Record checked
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