I haven't been able to find much about it causing any consistent specific health issues, except one study suggesting it may have an increased likelihood of causing tumors.
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It seems to depend on species. Melanoid Axoltol, for example, apparently tend to have weaker immune systems as a result of the mutations that cause their melanism, which in turn leads to higher mortality rates than albino or axanthic morphs
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It seems to depend on species. Melanoid Axoltol, for example, apparently tend to have weaker immune systems as a result of the mutations that cause their melanism, which in turn leads to higher mortality rates than albino or axanthic morphs