Plant Ash
Food-grade vegetable ash is composed primarily of potassium and sodium carbonates and is used in small amounts. Specific safety concerns depend on source: ash from contaminated wood may carry heavy metals or PAHs from incomplete combustion.
What it is
Mineral residue from controlled burning of plant material (e.g., hardwood, banana leaves) used historically in food preparation.
Alkalizing/leavening agent in some traditional foods; pH modifier in cheese rinds and tortilla nixtamalization analogs.
Why it's flagged
- Quality and source vary widely
- Possible heavy-metal or PAH contamination from poor combustion
What regulators actually say
"FDA maintains the Food Additive Status List as the agency's centralized listing of substances permitted in or on food, used as a quick reference for ingredient regulatory status."
Regulatory status
United States — FDA
Not a single defined additive; food-grade vegetable carbon (E153) has separate listing.
European Union — EFSA
Vegetable carbon (E153) authorized; generic plant ash not a defined additive.
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