Can cats eat human vitamin d supplements?

Q: Can cats eat human vitamin d supplements?

High-dose vitamin D tablets cause high calcium and kidney failure. Swallowing high-dose human vitamin D (1,000–5,000 IU) or psoriasis cream (calcipotriol) raises blood calcium and damages kidneys and heart. Some rodenticides are vitamin D–based too.

If your cat ate it

Signs: Vomiting, increased thirst and urination, lethargy, appetite loss
When: 12–36 hours
What to do now: Go to a vet before symptoms, with the product and remaining count.

Don't.

Why

Swallowing high-dose human vitamin D (1,000–5,000 IU) or psoriasis cream (calcipotriol) raises blood calcium and damages kidneys and heart. Some rodenticides are vitamin D–based too.

If your cat has a condition

Dangerous for every cat, with or without a health condition.

SourcesReviewed 2026-10-24

Merck Veterinary Manual — Cholecalciferol (vitamin D3) toxicosis
ASPCA Animal Poison Control — People Foods to Avoid Feeding Your Pets

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