Yes, turmeric can contain a significant amount of oxalate, which can form calcium oxalate kidney stones (the most common type of kidney stone). However, some curcumin products (which are extracts of turmeric) contain little to no oxalate. Find out which curcumin products are low in oxalate and get more details in the Concerns and Cautions
section of Turmeric/Curcumin Supplements Review.
See the Encyclopedia article about Kidney Stones
for information about other supplements which may be helpful or harmful.