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the claim
Pheomelanin provides a useful biological function in organisms
the verdict
CONTESTED
the evidence cuts both ways
confidence 30/100

Whether pheomelanin provides a net useful biological function remains contested, as studies show it can act as an antioxidant or protect cellular components, while other research links its synthesis and prooxidant properties to increased oxidative stress, DNA damage, and melanoma risk.

Evidence for · 3
A frame-shift mutation in COMTD1 is associated with impaired pheomelanin pigmentation in chicken
2023 · cited by 8
Paper 3 suggests that the metabolic pathways and associated enzymes involved in pheomelanin production play a protective role for melanocytes against oxidative stress.
Evidence against · 3
How does pheomelanin synthesis contribute to melanomagenesis?
2013 · cited by 97
Paper 0 links pheomelanin synthesis to increased oxidative stress and DNA damage, contributing to a higher risk of melanoma in redheads.
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More for · 2
Photoprotective actions of natural and synthetic melanins.
1998 · cited by 0
Paper 9 demonstrates that pheomelanin can exert antioxidant effects against UV-induced lipid peroxidation under certain conditions.
Dual role of melanins and melanin precursors as photoprotective and phototoxic agents: inhibition of ultraviolet radiation-induced lipid peroxidation.
1995 · cited by 0
Paper 11 indicates that pheomelanin precursors can reduce lipid peroxidation and help protect against harmful UV radiation effects.
More against · 2
Current update and trends in melanin pigmentation and melanin biology.
1995 · cited by 0
Paper 7 notes that while pheomelanin has some antioxidant properties, it can become a prooxidant in the presence of iron upon UV exposure.
Uveal melanocytes, ocular pigment epithelium, and Müller cells in culture: in vitro toxicology.
2002 · cited by 0
Paper 10 discusses how pheomelanin can exhibit phototoxic effects and act as a prooxidant as its properties change.
The paper trail · every fact has a biography
first checked01 Aug 2026
judged → CONTESTED · 3001 Aug 2026
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