Sodium Sulfate
Sodium sulfate is GRAS for limited food uses and is naturally present in many foods and water sources. It has low oral toxicity but can cause laxative effects at high doses (similar to sodium bicarbonate or magnesium sulfate).
What it is
An inorganic salt (Na2SO4); occurs naturally and produced industrially. Used in detergents, glass, and pulp/paper manufacture.
Limited use as a food ingredient; can occur in beverages and as a processing aid. Primarily used in detergents and industrial applications.
Why it's flagged
- laxative effect at high doses
- contributes to sodium intake
What regulators actually say
"Generally Recognized as Safe (GRAS) substances are exempt from FDA premarket approval requirements based on a long history of common use in food."
"Sodium sulfates (E 514) and potassium sulfates (E 515) are authorised as food additives in the European Union; EFSA Panel re-evaluated their safety."
Regulatory status
United States — FDA
GRAS for use as food ingredient under FDA's affirmation; generally considered safe at low levels.
European Union — EFSA
Permitted as food additive E514 (sodium sulfate); acceptable daily intake established by EFSA.
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