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they banned cobalt in 2014 which caused profuse sweating and blood clots that led to heart attacks, especially at the very high doses it took to have an effect on horses.
i remember when you could actually tell if the horse was on it or not after the race in the winners circle on a mild day when the horse's forehead needed to be sponged down. today they still sponge down horses after they race. but that was not the case before the cobalt era.
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