Brewer's yeast is often recommended as a supplement for pets, but many people are unsure of why exactly it is so good for animals. Considered a high energy food, yeast is rich in essential B vitamins, minerals, and high quality proteins, which contain many essential amino acids. Thesework together to promote a healthy coat and skin while also helping to control shedding. Brewer's yeast is also fed to pets to help control fleas, because it seems to create an odor that helps to deter fleas. It can also help neutralize your dog's urine, helping to eliminate urine spots in your lawn.

B vitamins are involved in energy production, and they also stimulate the nervous and glandular systems. They help to extend the lifespan of cells and increase the animal's ability to obtain oxygen. B vitamins are also known to raise your pet's ability to withstand stress.

Brewer's yeast contains high amounts of the minerals chromium and selenium. Chromium is an important part of the glucose tolerance factor, which helps to maintain the blood glucose level by converting body fats back to glucose when the body needs it. This action can be beneficial to pets with diabetes. Selenium works with vitamin E to encourage proper muscle development of the heart and digestive system, as well as external muscles.

Various studies and articles, including some published in the Whole Dog Journal, state that small amounts of garlic act as a natural flea repellant, and may also be used for its antibacterial and antifungal properties. Garlic acts as an immune booster for pets by promoting the production of white blood cells and may benefit pets with diabetes by working to reduce blood-sugar levels.

Brewer's Yeast & Garlic also utilizes Manganese in its formula. Manganese is a trace mineral found in tiny amounts in the body, mostly in the liver, pancreas, kidneys, and bones. Manganese helps the body form connective tissue, and it also plays a role in blood sugar regulation, carbohydrate and fat metabolism, and calcium absorption. Manganese is necessary for normal nerve and brain function.

It is recommended to use a calcium supplement and cod liver oil to provide vitamins A and D and to allow for the proper absorption and use of phosphorus and calcium, along with any brewer's yeast supplement.