I am currently feeding Biotin 800, but this would be a lot cheaper. Is there any reason I shouldn’t feed it?
https://purebulk.com/products/biotin-pure-vitamin-b7
https://purebulk.com/products/biotin-1-vitamin-b7
Bumping this up 
I’m planning to buy the 1% powder unless I learn there’s a reason I shouldn’t!
It looks like the 1% is 5000mcg per serving of 500mg? so that’s 5mg of biotin per serving size. Depending on how much biotin you need to supplement 1000 to 2000mg of this a day.
You might be better off with the pure b7 over the 1%. 10g size is 1000 servings if you supplement 10mg a day.
I might have to order some of this 
I’ve used various bulk supplements. The only trouble I’ve had is picky eaters to actually eat them. Since there’s none of the added stuff like alfalfa powder or dried molasses that are in horse supplements, some horses won’t eat the pure stuff. (I did find dried molasses on Amazon though)
I was thinking of going with the 1% over the pure biotin because I don’t have a good way to measure out 20 mg, but I could measure out 2 g. But the pure biotin is definitely cheaper and might be easier to get the horses to actually eat since it doesn’t require as much powder to be fed, if there’s a good way to measure it without a mg scale! Maybe the mini measuring spoons? Every manufacturer seems to give a different mg per 1/64 tsp though, and I’m not aure how accurate that would be with how powders pack.
Oh good! It seems like it might be worth a try to see if I can convince them to eat it then I was worried there might be a difference in absorption or availability in pure powder form, but I don’t think that’s the case from what I’ve read. And the powder is supposed to have 2 year shelf life from date of manufacture, so it should be ok to buy quite a few doses without it going bad.
Ah that’s a good point… I have a scale that will measure grams but not milligrams. That would be .02 grams of the pure biotin and I don’t think my scale will weigh parts of a gram. I will have to check 
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