NADH, NAD+

NADH has nice strong fluorescence
NAD+ doesn't
BUT NAD+ capsules came with 'microcrystalline cellulose' as an extra ingredient, and showed strong lingering RTP (video on this date)
One capsule in ~4ml water, settled (some top scum some bottom crud). Filtered clear middle liquid through .22um, about 2ml each. NADH 20mg/pill so ~10mg in 2ml vial, NAD+ 1000mg in pill so saturated, I est 100mg/ml? But who knows.