astaxanthin glutathione supplement VitaCosmoX Liposomal Setria® 1100mg, 120 Capsules Horbäach Astaxanthin Supplements | 10mg
Description
They cost slightly more but preserve more of your peptide over the life of the vial

What is IV Therapy for
We suggest the following IV dosing plan: Rate of Administration Guidelines The speed of IV administration is important to avoid bad effects

Glycerol, Ethanol

My feeling is that if you use any smaller gauge of needle you risk damaging the surrounding tissue at the injection site