Safflower petals come from a thistle-like plant and supply a floral, slightly bitter extract. People prepare it as tea, liquid extract, or powder.
Evidence for the petal extract is thin. Some people take it for general wellness or as a mild laxative, but these uses don't have strong mainstream backing. Many products highlight linoleic acid, though that fatty acid comes mainly from the seed oil, not the petals.
Safety information is limited. There is a theoretical bleeding risk, so anyone on blood thinners like warfarin or aspirin should be cautious. Pregnant or nursing women should avoid medicinal amounts since no safety data exist.