How Melanin Is Produced
How Melanin Is Produced — the process by which specialized skin cells called melanocytes synthesize melanin, the pigment that gives skin, hair, and eyes their color and helps shield against ultraviolet light. It begins with the amino acid tyrosine and the enzyme tyrosinase, and the finished pigment is packaged and transferred to surrounding skin cells.
Key points
- Melanin is made inside melanocytes within organelles called melanosomes, where the enzyme tyrosinase converts tyrosine into pigment.
- There are two main types, eumelanin (brown-black) and pheomelanin (red-yellow), and their ratio helps determine a person's skin and hair color.
- Ultraviolet exposure increases tyrosinase activity and melanin output, which is the biological basis of tanning as a protective response.
- Finished melanosomes are transferred from melanocytes to nearby keratinocytes, where the pigment forms protective caps over cell nuclei to shield DNA.
Frequently asked
Does more melanin mean more sun protection?
Higher melanin content does provide some natural defense and a higher baseline against UV damage, but it does not offer complete protection. People of all skin tones still benefit from sunscreen and sun-safe habits.
What is tyrosinase and why do skincare products target it?
Tyrosinase is the key enzyme that drives melanin production, so many brightening ingredients work by inhibiting it to reduce excess pigment. Slowing this enzyme can help fade dark spots and even out tone.
Related topics
This is a foundational entry in the SYNC Skin Encyclopedia and is expanded over time. Educational information only — not medical advice.
