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Medically reviewed by Vanessa Niles, R.N., M.D., F.A.C.O.G. —
Definition
Nicotinamide, in plain English
Nicotinamide is the amide form of niacin. You'll often see it called niacinamide on supplement labels and in skincare.
NIH notes that nicotinamide doesn't produce skin flushing because its chemical structure is slightly different from nicotinic acid's. The adult upper limit for supplemental niacin, 35 mg a day, covers both forms.
- Also called
- Niacinamide
- Flushing
- Doesn't cause it
- Role
- Recycled back into NAD+
For your treatment
What nicotinamide means for NAD+ therapy
Nicotinamide is an inexpensive vitamin form, not what NADMedics prescribes. List any vitamin B3 supplements at your consultation so your provider can review the total.
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- NAD+ nasal spray or injection, plans from $166 a month if prescribed
- NAD+ has no FDA-approved use; compounded NAD+ isn’t FDA-approved
Questions
Nicotinamide: common questions
What is nicotinamide?
Nicotinamide, also called niacinamide, is a form of vitamin B3. It's the building block the body recycles to remake NAD+, and unlike nicotinic acid it doesn't cause skin flushing.
Is niacinamide the same as nicotinamide?
Yes. They're two names for the same form of vitamin B3.
Should I take nicotinamide with NAD+ therapy?
Only if your provider agrees. Share every supplement at your consultation so your provider can look at what you're already taking.
Can I take precursors with NAD+ therapy?
Combining them hasn't been studied. Tell your provider about any NR, NMN, niacin or other supplements before you start.
Can I get enough NAD+ from food?
Food supplies niacin and tryptophan, which your body turns into NAD+, and NIH says most people in the U.S. get enough niacin. NAD+ in food is largely broken down during digestion.
Do precursors and NAD+ therapy do the same thing?
Both aim to raise NAD+, by different routes: precursors are converted by the body, while spray and injections deliver NAD+ itself. They haven't been compared in trials.
Keep learning
Related NAD+ terms
Terms that connect to nicotinamide, each explained on its own page.
- Enzymes & pathwaysNAD+ salvage pathwayThe NAD+ salvage pathway recycles nicotinamide, which is released whenever enzymes use NAD+, back into NAD+. It's the main way most human cells keep their NAD+ supply topped up.
- Enzymes & pathwaysNAMPTNAMPT (nicotinamide phosphoribosyltransferase) is the enzyme that turns nicotinamide into NMN. It's the rate-limiting step of the salvage pathway that recycles NAD+.
- Vitamins & precursorsNiacinNiacin is vitamin B3, an essential nutrient the body turns into NAD and NADP. It includes nicotinic acid and nicotinamide and comes from foods such as poultry, fish, nuts and grains.
- Vitamins & precursorsNicotinic acidNicotinic acid is the form of vitamin B3 most people mean by 'niacin.' In large doses it causes skin flushing, and it has been used as a prescription cholesterol medicine.
Guides that cover nicotinamide
- What Is NAD Injections? A Simple, Friendly Beginner's GuideNew to NAD+ injections? Learn what they are, how a shot under the skin works, what research shows, who should skip them and what they cost at NADMedics.NAD+ injections
- NAD Nasal Spray vs Pill: Which Option Truly Works Better?NAD+ nasal spray vs pills: compare oral NAD+, NADH, NR and NMN with prescription spray, what human trials show for each and the costs and trade-offs.NAD+ nasal spray
Official sources
Nicotinamide: sources and official resources
Official government and research sources behind this page, so you can check the facts yourself.
- NIH Office of Dietary SupplementsNiacin: Health Professional Fact Sheet
Explains how the body turns niacin (vitamin B3) into NAD, a coenzyme used by more than 400 enzymes.
- National Cancer InstituteNCI Dictionary of Cancer Terms: nicotinamide
Nicotinamide (niacinamide) is a form of vitamin B3.
- MedlinePlus (National Library of Medicine)Niacin and niacinamide (Vitamin B3)
Uses, safety and interactions of the two main forms of vitamin B3.
- NIH National Center for Biotechnology InformationNAMPT nicotinamide phosphoribosyltransferase [human] (NCBI Gene)
Gene record for NAMPT, the enzyme that turns nicotinamide into NMN.
Medically reviewed by Dr. Vanessa Niles, R.N., M.D., F.A.C.O.G., on October 12, 2026. This glossary is general education, not medical advice. NAD+ has no FDA-approved use, and compounded NAD+ is not FDA-approved or evaluated by the FDA for safety or effectiveness. Talk with a licensed provider before starting any supplement or treatment.
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