Risk groups for nicotinamide deficiency include individuals with:
- Chronic alcoholism
- Chronic diarrhea (Crohn’s disease, ulcerative colitis)
- Liver cirrhosis
- Carcinoid syndrome (increased consumption of tryptophan for serotonin synthesis).
- Hartnup disease (intestinal and tubular absorption disorder of neutral amino acids).
- Taking medications, such as certain analgesics, antidiabetics, psychotropic drugs, antiepileptic drugs, tuberculostatics, immunosuppressants, cytostatics.
- Pregnant women, from the 4th month
- Breastfeeding
