Freckles and age spots are caused by overproduction of melanin, resulting from
the oxidation and polymerization of tyrosine, a common amino acid that exists
everywhere in our bodies. Melanin is produced in the specific cells called
melanocytes in the basal epidermal layer. Tyrosine becomes melanin when it is
altered by tyrosinase, an enzyme produced in the melanocyte. Tyrosinase plays
a key role in melanin production, affecting associated proteins.
2
In order to maintain a beautiful skin, it is necessary to inhibit melanin
production by suppressing the effect of tyrosinase as follows:
1) Inhibit tyrosinase activity
2) Inhibit tyrosinase production
3) Inhibit melanin production