The Dog Immune Booster – Allergy Immunity Vitamins – Liquid Multivitamin for Dogs: Elderberry, Turmeric, Prebiotic, Vitamin C – Made in USA – Immune System Support Drops for Puppy and Pets (1 Pack) is a liquid multivitamin that helps provide immunity to allergies, colds, and other infections. This formula includes Vitamin C, elderberry extract, turmeric powder, prebiotic fiber, and olive leaf extract. The liquid form is easy to give to your pet and it will absorb quickly into the bloodstream.