Niacin dosage can vary based on age and gender. The recommended dietary allowances (RDAs) for niacin, also known as vitamin B3, are generally higher for males than females. For adult males, the RDA is around 16 mg/day, while for adult females, it is approximately 14 mg/day. However, these values can vary based on age. For example, the RDA for niacin for pregnant women is higher at 18 mg/day and even higher for lactating women at 17 mg/day. It is important to note that these values can change based on individual health conditions and specific needs. It is always recommended to consult with a healthcare provider before making any changes to niacin intake, especially through supplementation.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/NIACIN
[2] https://pubmed.ncbi.nlm.nih.gov/8297546/
[3] https://ods.od.nih.gov/factsheets/VitaminB6-HealthProfessional/