Basil is low in fat and cholesterol, and offers a good source of fiber, protein, and a range of vitamins and minerals.
Risks
In large quantities, basil could cause digestive upset leading to vomiting or diarrhea.
Very rarely, cats can have allergic reactions to basil, which may present as hives, vomiting, swellings, or breathing difficulties.
Suggestions
Basil should only be fed as an occasional treat and in small amounts.
Monitor your cat for any signs of allergic reactions or digestive upset.
If you are concerned about your cat, contact your veterinarian.
Note: even if labeled as safe, any food can potentially cause allergies. When introducing a new food, please feed a small amount and observe your cat for any allergic reactions.