If you use brand-name skin creams to look younger, treat acne or sun damage, chances are some of the ingredients were developed by a biotechnology company in Suffolk County.

Biocogent LLC supplies more than 60 active ingredients to major manufacturers of well-known skin care products in 14 countries.

The technology startup is in the middle of an expansion that involves moving from 12,000 square feet at Stony Brook University’s Long Island High Tech Incubator to a three-building campus in North Bellport. The project, valued at more than $10 million, will likely wrap up in December or early next year.