BHT (butylated hydroxytoluene)
BHT (هيدروكسي تولوين مبيوتل)
Synthetic antioxidant preservative · CAS: 128-37-0
Permitted - milder cousin of BHA
Why this verdict
Closely related to BHA; permitted antioxidant in pet & human food (FDA/AAFCO). Lighter signal than BHA - NOT IARC-classified as carcinogenic, not DNA-reactive, and some studies show BHT inhibiting BHA-related neoplasia; expert opinion divided. No proven harm to pets at use levels. Caution (not avoid): synthetic, contested, natural alternatives exist.
What It Is
A synthetic antioxidant related to BHA.
BHT does the same job as BHA and is permitted in pet and human food. It carries a lighter cloud than BHA - it’s not on the IARC possible-carcinogen list, and some studies even show it offsetting BHA’s effects - but expert opinion is split and it’s still a synthetic many owners skip. Same story as BHA: no proven harm to pets at use levels, with natural alternatives (tocopherols, rosemary) on cleaner labels.
Evidence & Status
For Dogs & Cats
Dogs
So-so
Cats
So-so
AAFCO / FDA status
Permitted antioxidant in animal & human food (FDA/AAFCO); not IARC-classified as carcinogenic.
Applies to
both
Halal Status: Halal
Synthetic; permissible.
Standard: MS 1500:2019; GSO 2055-1; JAKIM e-SMAF
Also Known As
BHT · E321 · dibutylhydroxytoluene
Primary Source
Evidence, not medical advice. You decide.
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