Courtesy of Ruff Hero
These supplements typically contain glucosamine, chondroitin and MSM, these are the most common ingredients currently used.
Additionally, glucosamine supplements are fortified with other ingredients with the idea to make them more effective. These are some of the additional ingredients added:
Turmeric
Black Pepper
Vegetables
Hemp
Yucca
Just like humans, dog can benefit from consuming foods that contain good bacteria (probiotics) needed to have a good digestive system
Fish oil is rich in omega 3 fatty acids and a great addition to your dog's diet. This supplement helps to keep your dog skin and coat healthy.