I needed to order some NAD+ and my usual places were out. MIX had a decent deal on tested buffered NAD+ so I ordered a couple kits. They arrived in a matter of days and were in 10mL amber vials. Their testing showed 550mg so I added 1.1mL bac as I like to use 0.2mL for a 100mg dose. Pinned some this morning. Took 0.1mL as a test. It gave the expected feels and had virtually no sting.