Ocimum basilicum
Why is it safe?
Basil is listed as non-toxic to cats by ASPCA Animal Poison Control. The aromatic compounds in basil (linalool, eugenol) are present at levels too low to cause clinical toxicity in normal culinary contact. Most cats show little interest in basil due to its scent.
Symptoms
None expected. Possibly mild, transient GI upset if very large amounts ingested, not a realistic scenario.
What To Do
No action needed.
Notes
Do not confuse with basil essential oil, which contains concentrated eugenol and linalool at levels that present greater hepatic concern. The distinction plant vs. concentrated oil applies across nearly all herbs in this category. Other confirmed non-toxic culinary herbs: dill (Anethum graveolens), thyme (Thymus vulgaris) in small amounts, and coriander/cilantro (Coriandrum sativum), all confirmed non-toxic by ASPCA. Contrast with the Allium family (garlic, onion, chives, leeks) which are all HIGH risk regardless of how small the amount.
Sources
→ ASPCA Animal Poison Control Center (non-toxic list) — aspca.org/pet-care/aspca-poison-control/toxic-and-non-toxic-plants/basil
→ International Cat Care — icatcare.org