SOMEBYMI Galactomyces Pure Vitamin C Glow Serum with 75% Galactomyces, pure vitamin C and 10 other vitamins creates a bright, radiant, even complexion. The serum is an anti-aging high potential that reduces the depth of wrinkles with adenosine and gently lightens unsightly spots with niacinamide and highly concentrated vitamin C. How do I use the SOMEBYMI Galactomyces Pure Vitamin C Glow Serum? After a toner, apply a few drops to the face and gently pat in.