The aim of this study is to compare the effects of 16 weeks of daily dietary supplementation with two investigational products containing collagen, methylsulfonylmethane (MSM), and vitamin C on skin parameters in comparison to a placebo product. The study will be conducted in healthy human subjects with visible facial erythema and telangiectasiae (cheeks), stable for ≥3 months, without active rosacea.
The primary objective is to demonstrate beneficial effects of the investigational products on facial erythema.
The secondary objective is to evaluate the effect of the investigational products on facial telangiectasiae severity.
Other skin parameters will be assessed as supportive endpoints, and differences in efficacy between the two investigational formulations will also be evaluated.