By Susan Carpenter, Los Angeles Times staff writer If you don't wear animals on your body, chances are you're loath to smear one on your face. And even if an animal byproduct isn't used in a moisturizer or a blush, those who don't eat or wear products of any kind from beings that walk, fly or swim have another concern. They want to know that the goods they use weren't tested on animals. Satisfying the demand for products that fit those descriptions is an über-niche market in the cosmetics industry: vegan beauty products. An extension of so-called natural beauty products, which largely eschew petrochemical ingredients, vegan items restrict their ingredient lists even further by prohibiting beeswax (which is often used in lip balms and mascaras), milk (found in soaps), collagen (a skin strengthener derived from cows), carmine (a colorant that comes from beetle shells) -- even the animal hairs that are used in the applicator brushes that accompany many products. The ZuZu Luxe beauty line from Gabriel Cosmetics is all natural and vegan as well as gluten-free.