Niacin, also known as vitamin B3, is an essential nutrient that plays a vital role in energy metabolism, skin health, and nervous system function. Alcohol, on the other hand, is a depressant that can interfere with various bodily functions.

There is limited information available on whether alcohol interacts with niacin absorption directly. However, alcohol consumption can cause liver damage, which can affect the body's ability to absorb and utilize niacin [2]. Chronic alcohol consumption can also lead to a deficiency in niacin, as alcohol can interfere with the conversion of tryptophan, an amino acid, into niacin [3].

Furthermore, niacin supplementation may increase the risk of liver damage in heavy drinkers [2]. Therefore, individuals who consume alcohol regularly should consult their healthcare provider before taking niacin supplements.

In summary, while there is limited information available on the direct interaction between alcohol and niacin absorption, chronic alcohol consumption can lead to liver damage and a deficiency in niacin. Therefore, individuals who consume alcohol regularly should consult their healthcare provider before taking niacin supplements.

Sources:
[2] https://www.mayoclinic.org/drugs-supplements-niacin/art-20364984
[3] https://www.mountsinai.org/health-library/supplement/vitamin-b3-niacin