Zombie yeast gets FDA nod for vitamin D bread boost
Published Date: 9/25/2026
Rule
Summary
The FDA just gave a thumbs-up to using vitamin D2 inactive baker's yeast as a safe way to add vitamin D2 to certain foods. This change helps food makers boost vitamin D in their products, starting September 25, 2026. If anyone has concerns, they have until October 26, 2026, to speak up—no extra costs or hassles expected!
Analyzed Economic Effects
4 provisions identified: 2 benefits, 2 costs, 0 mixed.
New Authorization to Fortify Many Foods
Starting September 25, 2026, the FDA allows vitamin D2 inactive bakers yeast to be used as a source of vitamin D2 in many food categories. The rule lists maximum levels for products such as breakfast cereals (350 IU/100 g), yeast-leavened baked goods and baking mixes (400 IU/100 g), meal replacement beverages (500 IU/240 mL, with a per-day 1,000 IU limit), and soy-based spreads (330 IU/100 g).
Mandatory Product Specifications for Ingredient
The FDA requires vitamin D2 inactive bakers yeast to meet specific manufacturing specifications such as moisture less than 7 percent; negative for Salmonella, Staphylococcus aureus, Escherichia coli, and Pseudomonas aeruginosa; coliforms less than 10 CFU/g; total plate count less than 3,000 CFU/g; yeasts and molds less than 300 CFU/g; and heavy metal limits (lead ≤ 0.5 mg/kg, arsenic ≤ 0.3 mg/kg, cadmium ≤ 0.5 mg/kg, mercury ≤ 0.1 mg/kg).
Labeling Requirement on Additive Container
The rule requires the food additive container label or labeling to include adequate directions for use so that the final food product complies with the maximum vitamin D2 levels specified in the regulation.
FDA Safety Finding and No Expected Exposure Increase
FDA concluded that using vitamin D2 inactive bakers yeast as authorized is safe and, because the petitioned uses are substitutional for existing vitamin D2 mushroom powder uses, is not expected to increase overall dietary vitamin D exposure. The rule cites estimated 90th percentile dietary exposures (for example, 3,170 IU/person/day for the U.S. population aged 1 year and older) and compares them to Institute of Medicine tolerable upper intake levels.
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