Synthetic vitamin fortification

Synthetic vitamin fortification: the presence of thiamine mononitrate, folic acid, pyridoxine, and similar signals the base ingredient was nutritionally stripped by processing. Folic acid is a specific concern: ~40% of people carry MTHFR gene variants that impair its conversion to usable folate.

• synthetic vitamin fortification
• thiamine mononitrate
• thiamine hydrochloride
• riboflavin
• pyridoxine hydrochloride
• cyanocobalamin
• folic acid
• ferric orthophosphate
• reduced iron
• ferrous sulfate
• niacinamide

No bans or restrictions are recorded for this ingredient in the jurisdictions clearlabel tracks (US, EU, UK, Canada, Japan, Australia/NZ, Brazil).

Synthetic vitamin fortification is the addition of manufactured vitamins and minerals like thiamine mononitrate, riboflavin, folic acid, and reduced iron back into a food. It is common in refined grain products, where milling removes much of the original nutrient content and the added nutrients restore some of it. The presence of these ingredients is a signal that the base food was refined rather than left whole.

Fortification is legal and, in the US, mandatory for enriched flour, which must contain added folic acid under an FDA rule that took effect in 1998. That program is associated with a measured drop in neural tube birth defects at the population level. Clear Label treats this as a low-severity processing marker rather than a harm: the flags mostly tell you the food was stripped and refilled. One specific point of ongoing research is that a large share of people carry MTHFR gene variants that reduce how efficiently they convert folic acid to the active form of folate, which is why some people prefer folate (5-MTHF) sources. The clinical importance of these variants for most healthy people is still debated, so Clear Label surfaces the marker for transparency, not as a verdict.

• Enriched white bread and buns
• Fortified breakfast cereals
• White rice labeled enriched
• Pasta and refined flour products
• Instant noodles and packaged mixes
• Some plant-based milks and meal shakes

Watch for names like thiamine mononitrate, folic acid, pyridoxine hydrochloride, cyanocobalamin, and reduced or ferric iron near the end of an ingredient list. On grain products the word 'enriched' is a reliable sign that nutrients were removed in processing and added back.

Some people who want nutrients from the whole food choose whole grain versions such as whole wheat bread or brown rice, where the nutrients are naturally present rather than added back. Those who watch folic acid specifically sometimes look for products using folate or methylfolate.

• MTHFR variants and folate metabolism review (PubMed)

pubmed.ncbi.nlm.nih.gov