Chondroitin sulfate is a building block of cartilage that we get from supplements, not food. People take it to ease stiff, achy joints from daily wear or aging.
Most formulas pair it with glucosamine. A typical intake is 800 to 1,200 mg across two smaller doses during the day.
It can cause mild stomach upset. Because chondroitin may raise bleeding risk, anyone on blood thinners like warfarin should check with a doctor before starting.