Studies have found 12 to 58% of ergogenic supplements contaminated, 30% containing incorrect amino acid sequences, and 65% exceeding safe endotoxin thresholds
in the Journal of Pharmacology and Experimental Therapeutics (the original cognitive-effects paper showing scopolamine-induced spatial learning deficit reversal in rats) has been under formal Expression of Concern since September 2021
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These could include mild issues like injection site reactions as well as nausea and upset stomach
1 2 "Vegan diet, subnormal vitamin B-12 status and cardiovascular health"
In contrast, subcutaneous injections are painless, because its mostly fat tissue youre penetrating