There are multiple ways to raise NAD+ levels, including what are called precursors. A precursor, for NAD+, is usually taken orally, but sometimes taken sublingually, and some of precursor will be converted by the body into intracellular NAD+. As referenced above, precursors to NAD+, NMN and NR, have been shown to raise NAD+ levels in animals with NR being researched more extensively.
There is another way to get more NAD+ into the body by using the molecule NAD+. Again, there are no known studies on raising NAD+ in humans by using NAD+. However, clinics treating a wide range of conditions sometimes use intravenous NAD+, sublingual, and subcutaneous NAD+, subQ NAD+, to administer NAD+ directly into the patient.
All of the intravenous and injectable vitamins sold by AgingHuman are NOT
for human consumption, but for research purposes only
. AgingHuman will not provide advice with any NAD+ stacks that include injectable vitamins and nutrients. All injectable forms of vitamins and nutrients are for research purposes only.
In an effort to raise NAD+ nasal sprays, sublingual, and subQ administration of NAD+ are now available. Please consider there are no patents on NAD+ so it seems unlikely there will be any studies on how much of the bodies levels of NAD+ will rise per administration method and dose. This is one of the other murky water areas of longevity science.