Melanogenesis
Melanogenesis — the biological process by which the skin produces melanin inside melanocytes, converting the amino acid tyrosine through a series of enzyme-driven steps into pigment. This process is heavily regulated by ultraviolet light and underlies both natural skin color and changes such as tanning and dark spots.
Key points
- The pathway begins when the enzyme tyrosinase converts tyrosine into intermediates that are further processed into melanin.
- Ultraviolet exposure is a major trigger that ramps up melanogenesis as a protective response.
- Finished melanin is stored in melanosomes and transferred to surrounding keratinocytes in the upper skin layers.
- Many brightening ingredients aim to slow melanogenesis, often by inhibiting tyrosinase or interrupting pigment transfer.
Frequently asked
Why do brightening products target melanogenesis?
Because interrupting steps in melanin production, such as tyrosinase activity, can help reduce excess pigment and support a more even-looking tone over time.
Is melanogenesis harmful?
No; it is a normal, protective process, though overactivity in localized areas can contribute to uneven pigmentation such as dark spots.
Related topics
This is a foundational entry in the SYNC Skin Encyclopedia and is expanded over time. Educational information only — not medical advice.
