labial melanotic macule histology a High power view of a (biopsy from 2004) with typical Oral pigmented lesions: Clinicopathologic features
Description
Not really

It can help even out skin tone and reduce dark spots, acne scars, and hyperpigmentation

For example, 15% of 106 females between the ages of 16 and 42 years had genital nevi, and in a study of 100 random autopsies, three cases showed melanosis of the genitalia, and all three were elderly women

The benefits rely on maintaining high concentrations in the muscle, so consistent, long-term use is generally considered safe and effective

[PubMed: 20652276] 806

Thymalin, thyroxine, and fibronectin were found to influence cellular immunity, particularly in patients with toxic goiter and autoimmune thyroiditis, suggesting the hormone-dependent regulation of lymphocyte function