Update: the ancestral supplements beef heart did not agree with me .
I got some kind of infection or at least gut problems from it.
I just ordered dried bull testicles slices from this site, it's actually for dogs to chew on ,but i don't see why it wouldn't be for human consumption too . It's a lot cheaper .
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I thought that too and was surprised how "cheap" it is sold for but eating meat sold for dogs could be problematic in the sense that its cheap meat scraps from animals whos quality of life/food may be bad/unknown. They also don't have any accountability towards you if you eat it against the manufacturers/brands warning that it is not ment for human consumption.
Make sure to check the source/quality when doing this. This could realy be problematic or more of an issue than the supplement.