Because they are not approved by the FDA for human use, dosing, purity, and safety cannot be guaranteed
This is the established method
The Neelakantan 2018 paper showed strong oral absorption in cell uptake (Caco-2) assays, which is why most research community use is by mouth instead of by injection
Batch numbers, lot identifiers, analytical records, and COA details help connect a material to its documented history
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