Remedies

The ingredients themselves, and who each one is appropriate for.

Glucosamine Dogs and cats. The oldest joint supplement on the shelf, and the one with the most mixed evidence behind it.
Chondroitin Dogs and cats. Almost always paired with glucosamine, rarely studied on its own.
Green lipped mussel Dogs and cats. A whole food source of omega 3s and glycosaminoglycans, fed as a powder.
Fish oil Dogs and cats. The supplement with the least controversial evidence base in the whole aisle.
Turmeric Dogs. Dosed and studied in dogs. Cats clear it differently, so the dog formulations do not simply scale down.
MSM Dogs. A sulfur compound that shows up in most canine joint blends and almost no feline ones.
CBD oil Dogs and cats. The most asked about and least consistently labelled product on this site.
Hemp oil Dogs and cats. Sometimes a CBD product, sometimes a seed oil. The label decides which.
L-theanine Dogs and cats. A calming amino acid with a real, modest, well tolerated effect.
Melatonin Dogs and cats. Used for sleep, storm phobia and some coat conditions. Watch for xylitol in the tablets.
Probiotics Dogs and cats. Strain specific, shelf life sensitive, and worth buying carefully.
Quercetin Dogs and cats. The plant flavonoid marketed as nature's antihistamine, with the caveats that phrase deserves.
Reishi Dogs and cats. The calm and immune mushroom, and the one with the longest traditional record.
Turkey tail Dogs and cats. The mushroom with the single best known veterinary oncology study behind it.
Lion's mane Dogs and cats. Studied for nerve and cognition support, mostly outside veterinary medicine so far.