Bulgarian Yogurt Probiotic skincare has been developed, based on the highly prized qualities of the Bulgarian yogurt, made in ecologically clean regions in Bulgaria and well known as a source of health and longevity. It features two probiotic strains of patented lactic acid bacteria, Lactobacillus bulgaricus and Streptococcus thermophilus that are frequently combined.

Lactobacillus bulgaricus is the main bacteria used for the production of yogurt. First identified in 1905 by the Bulgarian doctor Stamen Grigorov, the bacterium feeds on lactose to produce lactic acid, well-known for its cosmetic benefits. Lactobacillus bulgaricus can be found naturally living only in Bulgaria, although the bacterium is grown artificially in many other countries.