Although more research is needed, evidence published in April 2015 in the International Journal of Women’s Dermatology suggested that fermented dairy products like yogurt may promote skin health. Yogurt is also a probiotic, which has been shown to inhibit C. acnes.
To make the mask, combine 1 tsp of brewer’s yeast with a little plain yogurt to create a thin mixture. Cook-Bolden says, “Apply it thoroughly to all the oily areas and leave on for 15 to 20 minutes. Rinse with warm water; then use cold water to close the pores.”