Why joint supplements take six weeks

Every other tissue in a dog gets its supplies by blood. Cartilage does not. It has no vessels running through it, so everything it needs arrives by diffusion through the joint fluid, and it only moves properly when the joint itself moves.

That single fact explains most of what owners find frustrating about joint supplements. A green lipped mussel capsule swallowed at breakfast has to be digested, absorbed, carried in the blood to the joint capsule, released into the fluid, and then work its way into a tissue that takes its time. None of that happens in an afternoon.

The studies that show a real effect tend to run for eight to twelve weeks, and the curves in them are slow and steady rather than sudden. Four to six weeks is where most owners first notice something, and what they notice is usually the mornings: less time stood at the bottom of the stairs, less of a stretch before the first walk.

This is also why the dose matters more than the ingredient list. Green lipped mussel at 500mg a day has evidence behind it. The same ingredient at 50mg, listed proudly on a label, has none. If a tub will not tell you the amount, it is usually because the amount is not worth printing.

What to do with that: pick one thing, give it at a real dose, and mark six weeks in the calendar from the day you start. If nothing has changed by then, stop and tell us. That is a more useful answer than quietly buying a second tub.