Niacinamide exists in both natural and synthetic forms. It occurs naturally in animal and plant foods as part of the vitamin B3 family, but the niacinamide in your skincare products and most supplements is synthetically produced. The two are chemically identical, sharing the same molecular structure regardless of origin.
Niacinamide in Food
Your body encounters niacinamide every day through food. It’s one of the natural forms of vitamin B3 (niacin), and it shows up in a wide range of animal and plant sources. In meat, poultry, and fish, niacin is primarily stored as part of larger molecules called NAD and NADP, which your body breaks down and converts during digestion. These forms are highly bioavailable, meaning your body absorbs them efficiently.
Animal sources are the richest. A 3-ounce serving of pan-fried beef liver delivers about 15 mg of niacin, while the same amount of grilled chicken breast provides around 10 mg. Pork tenderloin comes in at roughly 6 mg per serving, and ground beef at about 5.8 mg. Plant foods contribute smaller amounts: peanuts offer about 4 mg per ounce, a cup of cooked brown rice has around 5 mg, and lentils provide about 1 mg per half cup. Dairy is low on the list, with a cup of milk or yogurt providing less than half a milligram.
There’s a catch with plant sources. In some grains, niacin is bound to other compounds in a way that makes only about 30% of it available for absorption. This is one reason why communities historically dependent on corn (where niacin is tightly bound) were vulnerable to pellagra, the niacin deficiency disease. Your body can also manufacture its own niacinamide from the amino acid tryptophan, found in protein-rich foods like turkey. Roughly 60 mg of tryptophan converts to about 1 mg of niacin.
How Synthetic Niacinamide Is Made
The niacinamide listed on your serum or supplement label is almost certainly synthetic. Commercial production starts with a chemical called 3-cyanopyridine, a compound derived from industrial chemical processes. The conversion from 3-cyanopyridine to niacinamide can happen through purely chemical reactions or through enzymatic methods that use specialized bacteria.
The enzymatic approach has become a preferred route for large-scale manufacturing. Enzymes called nitrile hydratases, produced by engineered bacteria, convert 3-cyanopyridine into niacinamide in a single clean step. One well-documented industrial process uses an enzyme that converts 200 grams per liter of 3-cyanopyridine into niacinamide in about five and a half hours, with no unwanted byproducts. This method is favored because it runs at mild temperatures and avoids harsh chemical reagents, making it efficient and relatively clean to scale.
Whether produced chemically or enzymatically, the end result is the same molecule: pyridine-3-carboxamide, with the molecular formula C₆H₆N₂O. There is no structural difference between the niacinamide your body extracts from chicken breast and the niacinamide synthesized in a factory.
Does the Source Matter for Your Skin or Health?
From a biochemistry standpoint, no. Your cells cannot distinguish between niacinamide from food and niacinamide from a lab. The molecule is identical either way, and it performs the same functions: supporting energy metabolism, DNA repair, and skin barrier maintenance. When applied topically in a serum, the niacinamide penetrates your skin and participates in the same cellular processes it would if delivered through your bloodstream after a meal.
The practical reason niacinamide in products is synthetic comes down to concentration and cost. A typical skincare serum contains 2% to 10% niacinamide, far more than you could extract economically from food sources. Synthesizing it ensures consistent purity, stable supply, and a price point that makes it one of the most affordable active ingredients in skincare.
Why “Natural” vs. “Synthetic” Can Be Misleading
Labels that advertise “naturally derived niacinamide” are generally referring to the enzymatic production method, where bacteria do the chemical conversion rather than a purely synthetic reaction. This is a real distinction in manufacturing, but it does not change the final molecule. Some brands use this language to appeal to consumers who prefer greener chemistry, and the enzymatic process does have a smaller environmental footprint than older chemical synthesis routes. But the niacinamide itself is structurally the same.
If your concern is about what you’re putting on your skin or swallowing in a supplement, the relevant question isn’t natural versus synthetic. It’s purity, concentration, and formulation stability. A well-formulated synthetic niacinamide product delivers the vitamin in a controlled, effective dose, something food sources alone can’t replicate for topical use.