Sent GLOW, KLOW, and the TB BPC blend to a lab after 30 days refrigerated., 99.6% purity before. 99.6% purity after., Same milligram content. No measurable degradation., These blends are PDF) Comparison of pharmacokinetics of L carnitine, Acetyl L carnitine and Propionyl Lcarnitine after single oral administration of L carnitine in healthy volunteers The difference between L Carnitine and Acetyl L Carnitine (ALCAR) Health4All PCOS Nutrition Center L Carnitine (120 Capsules) PCOS Nutrition Center