Thunderbrook are licensed as an animal feed manufacturer (with a registered facility number) and each batch number of our herbs is fully traceable back to source. There are inferior grades available at cheaper prices (but the curcumin levels and purity may be questionable). Many horse owners are reporting that they see benefits when adding turmeric to their horses feed. Turmeric has been shown to have a number of beneficial properties in humans and mice, etc but no peer reviewed research has been done yet with horses. If you see good effects, that is excellent, but remember to feed in moderation (more is not always better! - turmeric can upset the digestive system if fed in too high an amount) and although it can be a useful spice to use, it is not a miracle cure. The most important thing is to get the baseline diet correct - many health issues can disappear when this is done - and then turmeric can be a helpful addition. Nutritionally supports: Healthy joints, healthy respiratory functions, normal gastro-intestinal function, detoxing.