The recommended daily niacin intake levels vary depending on age and gender. According to the National Institutes of Health (NIH), the recommended dietary allowance (RDA) for niacin is as follows:

* For males aged 14 years and older: 16 mg (milligrams) daily
* For females aged 14 years and older: 14 mg daily
* For pregnant females: 18 mg daily
* For lactating females: 17 mg daily

It is worth noting that niacin, also known as vitamin B3, is a water-soluble vitamin, and any excess amount that the body does not use is excreted through urine. Therefore, it is crucial to maintain a consistent daily intake of niacin to prevent deficiency.

Niacin plays a vital role in various bodily functions, including energy production, DNA repair, and the synthesis of fatty acids. Moreover, niacin has been shown to help lower cholesterol levels and improve cardiovascular health when taken in high doses as a dietary supplement or prescription medication [1].

However, it is essential to consult a healthcare provider before taking niacin supplements, especially in high doses, as they can cause side effects such as flushing, itching, liver damage, and stomach ulcers [2].

In summary, the recommended daily niacin intake levels vary depending on age and gender, and it is crucial to maintain a consistent daily intake of niacin to prevent deficiency. Niacin has various health benefits, but it is essential to consult a healthcare provider before taking niacin supplements in high doses.

Sources:

1. DrugPatentWatch.com. (n.d.). Niacin. Retrieved from <https://www.drugpatentwatch.com/drugs/niacin>.
2. National Institutes of Health. (2021). Niacin. Retrieved from <https://ods.od.nih.gov/factsheets/Niacin-Consumer/>.