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Purity % matters less than consistency swings batch to batch tell the real story.
COAs are nice but independent testing is what I trust.
Transparency builds trust. Clear info on purity and batches separates pros from sketchy ops.
Good raws smell neutral and dissolve clean bad ones don’t.
If bloodwork is steady across batches purity is probably solid
Crystallization issues usually mean impurity or poor synthesis
Same dose same labs every run consistent raw.
Long term suppliers with stable feedback beat cheap high claims every time
HPLC or GC-MS is the only real purity answer
Reputable suppliers keep particle size identical batch to batch
