A Comparator Changes the Formulation Question
In a 60-person rosacea study, an oat-and-aloe moisturizer was compared with metronidazole plus a plain moisturizer. The results describe two complete regimens, not an isolated delivery mechanism.
Read the comparator first
In a randomized, double-blind, single-center rosacea study, 30 adults used an oat-and-aloe moisturizer and 30 used 0.75% metronidazole cream. The metronidazole group also used a plain moisturizer. That detail matters: the researchers tried to balance basic moisturizing care across the two arms.[1]
At week 12, investigator-rated erythema scores had fallen 54% in the oat-and-aloe arm and 23% in the comparator arm. Inflammatory lesion counts fell 74% and 17%, respectively. These figures describe outcomes under the tested regimens over 12 weeks, not the performance of isolated ingredients.[1]
What the trial cannot isolate
The investigational moisturizer combined botanical ingredients with a complex formulation that the paper describes as using a microemulsion. The trial compared this complete product with a different drug-and-moisturizer regimen. It did not compare the same actives with and without the microemulsion, or measure their distribution in skin. The observed difference therefore cannot be assigned to the delivery system alone.[1]
The study was funded by Crescel and followed participants for 12 weeks. Its author notes that most participants did not achieve complete rosacea clearance. A useful next study would separate formulation variables and measure local exposure alongside clinical response.[1]
Sources
- Draelos ZD. Efficacy, Tolerance, and Safety of a Novel Botanical Anti-Inflammatory Moisturizer in Rosacea: Results From a Double-Blinded, Randomized Controlled Trial. Journal of Cosmetic Dermatology. 2026;25(5):e70910. doi:10.1111/jocd.70910.