Nicotinamide

A form of vitamin B3 (also called niacinamide) used to fortify foods and supplements; it is the amide form of niacin that helps your body make NAD⁺ for energy metabolism.

Should I eat Nicotinamide?

Nicotinamide is a safe, effective form of vitamin B3 used in tiny amounts to fortify foods and prevent deficiency. The main risks arise only with high‑dose supplements, which can cause side effects and, at very high intakes, liver injury.

Summary

Nicotinamide (niacinamide) is the common fortification form of vitamin B3 that helps your body maintain NAD/NADP for energy metabolism. It is FDA‑affirmed GRAS and added to staples like flour and bread at low, regulated levels. Safety reviews set a tolerable upper intake of 900 mg/day for adults; typical fortified foods provide amounts far below this. The nicotinamide form avoids the flushing seen with nicotinic acid, but high‑dose supplements can still cause gastrointestinal issues and, at very high intakes, liver toxicity. During pregnancy or breastfeeding, avoid high‑dose supplements unless your clinician advises them.

Key Research Points

High supplemental doses can harm the liver

Nicotinamide is well tolerated at food-fortification levels, but around 500 mg/day can cause stomach upset and easy bruising, and 3,000 mg/day or more has been linked to nausea, vomiting, and liver damage.

Upper limit exists; pregnancy data are limited

EFSA sets a tolerable upper intake level for nicotinamide at 900 mg/day for adults and excluded pregnancy and lactation when setting this limit due to limited data, so high-dose supplements should be avoided unless advised by a clinician.

Fortified amounts are tiny and GRAS

FDA affirms niacinamide (nicotinamide) as GRAS as a nutrient supplement, and enriched flour typically contains about 24 mg niacin per pound—amounts far below the upper limits.

Overview

What is it?

Source: Synthetic vitamin from 3-cyanopyridine

Method: Hydrate 3-cyanopyridine to amide; crystallize and dry

Processing Level: 8 / 10

Why is it used?

Purpose: Vitamin B3 fortification to prevent deficiency.

Commonly found in: Fortified cereals;Meal bars;Energy drinks;Multivitamins;Electrolytes

Why manufacturers choose it: Precise, stable, neutral-tasting, low-cost B3 source.

Origin

Food fortification with niacin dates back to the early 1940s in the U.S., when standards for “enriched” flour and bread were created to eliminate pellagra. These standards required set amounts of niacin (as niacin or niacinamide) per pound of flour and bread, and similar enrichment spread to other staples like rice. Today, nicotinamide remains the workhorse B3 source in premixes for cereals, bars, and beverages.

Process: Hydrate 3-cyanopyridine to amide; crystallize and dry

Steps

1. Synthesize precursor: Make 3-cyanopyridine from 3-picoline via ammoxidation (industrial commodity route).

2. Hydration to amide: Convert 3-cyanopyridine to nicotinamide via nitrile hydratase (biocatalyst) or catalytic hydration.

3. Refine: Filter, decolorize/deionize as needed, and concentrate.

4. Crystallize & dry: Crystallize nicotinamide, wash, dry, and mill to FCC/food grade.

Chemicals

3-cyanopyridine (precursor)

Ammonia/air (for cyanopyridine manufacture)

Heterogeneous catalysts or nitrile hydratase (biocatalyst)

Research & Safety

Potential Concerns

The main concern is from high-dose supplements, not foods. Around 500 mg/day can cause stomach upset and easy bruising, and 3,000 mg/day or more has been linked to liver damage; these amounts are far above what you get from fortified foods. EFSA set an adult upper limit at 900 mg/day for nicotinamide and excluded pregnancy and breastfeeding due to limited data, so avoid high-dose products unless a clinician recommends them. This ingredient is a highly refined, synthetic vitamin; while not hydrogenated and considered safe at food-use levels, it delivers only B3, not the broader nutrients found in whole foods.

Potential Benefits

Nicotinamide provides vitamin B3, which your cells use to make NAD and NADP for normal energy metabolism. Fortifying common foods with small amounts of B3 helps prevent pellagra, the disease caused by severe niacin deficiency. The nicotinamide form generally avoids the flushing that some people get from nicotinic acid. For most people, the amounts found in enriched grains, cereals, and beverages help meet daily needs without noticeable effects.

Digestive Effects

At typical fortified food levels, nicotinamide is not expected to affect digestion. At supplemental intakes around 500 mg/day, some people report nausea, diarrhea, or abdominal discomfort. Very high intakes (3,000 mg/day or more) have been linked to more serious effects including liver toxicity, which can also worsen digestive symptoms. If you choose a supplement and have a sensitive stomach, start low, take with food, and check total daily intake across multivitamins, energy shots, and other products.

Limit Consumption

Pregnant or breastfeeding individuals should avoid high-dose nicotinamide supplements unless advised by a clinician, because high‑dose data are limited. People with liver disease should be cautious with supplements, since very high intakes have been linked to liver toxicity. Because high doses can increase bruising, those on blood thinners should discuss any nicotinamide supplement use with their healthcare provider. Infants should receive age‑appropriate formulas or foods as directed; do not add adult B3 supplements to infant diets.

Fact Sheet

Regulatory Status

US FDA: GRAS affirmed as a direct human food ingredient (21 CFR 184.1535).

EU Status: Permitted vitamin; UL for nicotinamide set at 900 mg/day (adults).

Codex INS: 375 (niacin/nicotinamide)

JECFA ADI: Not established for this nutrient form as a typical food additive; evaluated primarily as a vitamin.

ESG & Sustainability

Environmental Footprint: Used at milligram levels; overall footprint is small relative to bulk ingredients, though precursor synthesis uses petrochemical routes.

Sustainability: Biocatalytic hydration routes reduce by-products versus purely chemical hydrolysis.

Animal Welfare: Not animal-derived; suitable for vegan products.

Carbon Footprint: Very low per serving due to tiny dose; dominated by upstream chemical manufacturing and logistics.