Nutrition and Supplementation Guidelines
Medication Interactions
- NAD supplements, particularly nicotinic acid form, may interact with statins, potentially increasing the risk of side effects, as suggested by the American Heart Association 1
- Combining NAD supplements with antiplatelet therapies may increase bleeding risk, according to the American Heart Association 1
- Antihypertensive medications may have additive effects with NAD supplements, requiring dose adjustments, as noted by the American Heart Association 1
- Antioxidant vitamins can adversely interact with niacin (NAD precursor), reducing its antiatherosclerotic benefits, as warned by the American Heart Association 1
- Grapefruit can increase blood levels of medications when taken concurrently with NAD supplements and statins, as advised by the American Heart Association 1
Side Effects
- Flushing is the most common side effect of NAD supplements, occurring at doses as low as 30 mg of nicotinic acid, as reported by the Clinical Nutrition society 2
- Hepatotoxicity, or serious liver damage, can occur at higher doses (around 3 g per day) of NAD supplements, as stated by the Clinical Nutrition society 2
Dosing Considerations
- Dosing of NAD supplements should be adjusted based on patient factors, including age, gender, ethnicity, and comorbidities (especially renal and liver disease), as recommended by the American Heart Association 1
- The European Food Safety Authority recommends an upper limit of 10 mg/day for free nicotinic acid to avoid adverse effects such as flushing, particularly in young subjects at higher doses 2
- Riboflavin supplementation at doses of 50-200 mg/day may support NAD+ metabolism in patients with multiple acyl-CoA dehydrogenase deficiency (MADD), as suggested by the European Food Safety Authority 2
Nutritional Recommendations
The daily recommended intake of niacin equivalents is:
Population Recommended Intake Men over 14 years 16 mg/day Women over 14 years 14 mg/day Pregnant women 18 mg/day Lactating women 16 mg/day - Rich sources of preformed niacin include meat, poultry, fish, nuts, legumes, and whole grains, which can provide a significant portion of the recommended daily allowance (RDA) 3
The established upper limits for niacin intake are:
Form Upper Limit Nicotinic acid 10 mg/day (due to flushing risk) Nicotinamide approximately 900 mg/day for adults
Supplementation Guidelines
- NAD+ supplementation is only recommended for patients with confirmed niacin deficiency or specific medical conditions requiring higher doses, as stated by the American College of Nutrition 3
- The standard treatment for niacin deficiency is 15-20 mg/day of nicotinic acid or 300 mg/day of nicotinamide, as recommended by the Institute of Medicine 3
- Current clinical guidelines do not recommend glutathione or NAD+ supplementation for anemia in mitochondrial disease, as stated by the Annals of Oncology and Kidney International Supplements 8, 9