OK, I don't understand this - do I need more niacin/nicotinamide?
Niacin < 20
Note
Due to the large variability in the metabolism of nicotinic
acid, the dosing preparation used (immediate-release vs. extended
release), and the mg doses used, the serum concentrations may
range from less than 20 ng/mL to about 30,000 ng/mL. After oral
administration of an immediate-release tablet, peak plasma
concentrations occur in 4 to 5 hours. The plasma half-life of
nicotinic acid is about one hour. In one study, fasting plasma
concentrations were reported to be less than 20 ng/mL. In another
study, it was reported that the administration of a single 1000
mg extended-release tablet resulted in mean nicotinic acid
concentrations of less than 50 ng/mL.
Nicotinamide 20
Note
Nicotinamide is a metabolite of nicotinic acid. Due to the large
variability in the metabolism of nicotinic acid, plasma
concentrations of this metabolite are variable. In one study,
fasting plasma concentrations were reported to be approximately
40 ng/mL. In another study it was reported that the
administration of a single 1000 mg of extended-release tablet of
nicotinic acid resulted in a mean peak nicotinamide concentration
of 400 ng/mL between 5 and 10 hours post dose, decreasing to
about 100 ng/mL by 16 hours post dose.
I'm headed to pic up a prescription at Walgreens - I'm going to look for copper and niacin, I guess - but I don't want the niacin flush. I found some OLD OLD OLD vitamin A from Vitalady I bought in preparation for and after plastic surgery in 2009 - it says it expired in 2011, but I've got three bottles so I'm going to start with that.