I'll jump in here about turmeric (or tumeric - same stuff, folks just have different names for it - its also called Haldi if you buy it from Asian supermarkets).
I went to an evening at my vets where there were various drug reps all promoting different things. One of them commented on turmeric. Apparently, in countries such as India and Pakistan where turmeric is a constant part of the diet, the % of the population suffereing from arthritis or osteoarthritis is very very small. It apparently, helps to prevent these diseases and has antiinflammatory and analgesic properties??
I now have all my horses on it and have seen a noticible difference in them. Dont get me wrong, Arnie has no problems (although he did have a hock issue when he was younger - juvenile spavin - he is fully sound just now) but he is just so much looser on turmeric - and
happier. I swear this stuff is happy powder for horses
I did have to change my feeding methods though, we needed new, wide, flat buckets as he had a big yellow stripe over his nose
I buy mine from the local Chinese supermarket. £4.30 for 1kg which lasts 3 horses a couple of months. I feed 2 10ml scoops per day to Arnie (he's just under 500kg).
It also works for humans but its absolutely vile to take! My friend takes it in fruit juice but yuuuccckkkk! You can get it in tablet form from the likes of Holland and Barrett
.
Incidentally, start your horses on it very very gradually - there will be a lot of lip curling and horrified looks to start with. It must be an aquired taste though cos I can bung it in no bother now