Turmeric has been grown and used across South Asia for thousands of years, both as a spice and as a core ingredient in Ayurvedic medicine, where it was valued for its warming properties and its role in supporting joints and digestion. Its bright yellow-orange root was used not just medicinally but ceremonially — turmeric paste has long featured in South Asian religious rituals and wedding traditions as a symbol of purity and prosperity.
From India, turmeric traveled along ancient trade routes into China, Southeast Asia, and eventually the Middle East and East Africa, carried by traders who valued both its flavor and its reputation as a healing spice. By the medieval period it had reached Europe via spice trade routes, though it remained a niche import for centuries compared to more dominant spices like pepper and cinnamon. Only in recent decades has turmeric — and specifically its active compound, curcumin — become a global wellness staple, driven by modern scientific interest in its anti-inflammatory properties.
Turmeric's active compound, curcumin, is the most researched part of the plant, and most of that research has focused on knee osteoarthritis. Multiple systematic reviews and meta-analyses — pooling data from randomized controlled trials — have found that curcumin/turmeric extracts meaningfully reduce knee pain and improve function compared with placebo, with effects in some studies approaching those of common anti-inflammatory drugs, though generally with fewer reported side effects over the short term.
That said, researchers are consistent in flagging real limitations: study quality varies, turmeric preparations differ widely in dose and bioavailability (curcumin is poorly absorbed on its own, which is why many supplements combine it with black pepper extract or special formulations), and the overall certainty of evidence is still rated as low to moderate. In plain terms: the research is genuinely promising and turmeric is one of the better-supported natural remedies for joint pain, but it isn't a settled, slam-dunk cure, and more high-quality trials are still needed.
Historically, turmeric was ground fresh from the rhizome into a paste or powder and mixed into food, warm milk, or applied topically as a paste for skin and joint complaints. "Golden milk" — turmeric simmered in warm milk, often with black pepper and a fat source — remains one of the most enduring traditional preparations across South Asian households today.