Retinyl Palmitate may or may not be vegan. Also known as Vitamin A Palmitate, it is used in vitamin supplements, skincare products, and is added to dairy products such as milk from captive cows.
Retinyl Palmitate is the ester of Retinol (Vitamin A) with Palmitic Acid. Retinol may be derived from animals, or be synthesized. Please check with the manufacturer.
Palmitic Acid is mostly likely vegan, though it is sourced from Palm Oil which has its own issues.