Alcohol consumption can have an impact on the body's ability to absorb and utilize niacin. Niacin is a type of B vitamin that plays a crucial role in maintaining healthy skin, nerves, and digestion. According to the Mayo Clinic [2], excessive alcohol consumption can lead to a deficiency in niacin, which can result in a condition called pellagra. Pellagra is a rare condition that can cause skin rashes, diarrhea, and other symptoms. Additionally, alcohol can interfere with the body's ability to absorb niacin [2][3].

It is important to note that not all types of alcohol have the same impact on niacin levels. The website Drug Patent Watch [1] explains that the type of alcohol that is consumed can impact the body's absorption of niacin. For example, beer and wine contain more niacin than other types of alcohol, such as spirits. However, the consumption of alcohol in general can still lead to a deficiency in niacin [2].

In conclusion, excessive alcohol consumption can lead to a deficiency in niacin, which can result in a condition called pellagra. Alcohol can also interfere with the body's ability to absorb niacin. While the type of alcohol consumed can impact the body's absorption of niacin, the consumption of alcohol in general can still lead to a deficiency in niacin. It is important to maintain a balanced and healthy diet to ensure adequate intake of essential vitamins and minerals.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/ALCOHOL
[2] https://www.mayoclinic.org/drugs-supplements-niacin/art-20364984
[3] https://ods.od.nih.gov/factsheets/Niacin-HealthProfessional/