SECTION 03 / AMOUNTS USED IN STUDIES
What NAD+ amounts did studies test?
Researchers chose an amount and watched for weeks. Their choices aren’t instructions for you.
What should you know before the amounts?
Researchers first set pill amounts to see whether blood NAD+ rose. They watched people for several weeks. The figures below report those tests. They don’t tell you what to take. Most studies used hundreds or low thousands of milligrams each day. Whole NAD+ doesn’t enter cells well by mouth. An IV drip leaves the blood fast too. The form can matter as much as the amount. Ask your doctor what fits your health.
What NAD+ dosage did human studies use?
Most human studies used NMN or NR. NMN studies used 250-900 mg/day. Other work went up to 1200 mg/day. The 250 mg/day amount appeared most often. The 600 mg/day group had the best mix of blood, walking, and daily-life results [3]. The 10-week insulin study used 250 mg/day [1].
NR studies often used 250-1000 mg/day. One Parkinson’s safety study reached 3000 mg/day. Another gave 100, 300, or 1000 mg/day [4]. A skin study gave 500 mg of nicotinamide twice daily. Nicotinamide is a form of niacin.
Researchers checked blood NAD+, walking, and insulin response [1][3][4]. People took the pills under study care. The figures aren’t a personal dose plan. This page can’t choose a product or amount for you.
Which forms have been studied in people?
Four broad route classes appear in the literature, with very different evidence behind them. Oral capsules and powders of NMN, NR, and nicotinamide carry the bulk of the controlled human evidence [4]. Intravenous NAD+ infusion is used in wellness settings but rests on limited controlled data, mostly pilot and retrospective [12]; the IV NAD research page covers it in full. Subcutaneous and intramuscular NAD+ injection is compounded and has minimal peer-reviewed pharmacokinetic data. Sublingual, intranasal, topical, and transdermal formats are marketed but thinly studied. The contrast in evidence weight across routes is itself one of the clearest findings: the more invasive the route, generally the thinner the controlled data.
That same route-by-route split doubles as a regulatory one, and it is where NAD+ gets genuinely hard to track. Oral NMN and NR products are sold without prescriptions, although NMN’s supplement status remains disputed. IV NAD+ is still sold as a wellness service, but an infusion may involve a prescriber’s assessment and a compounded drug. For a compounded NAD+ medication, the prescription follows an individual clinical decision; compounding does not amount to FDA drug approval. That prescription-based lane is not specific to NAD+; it is how supervised access works for peptides generally. Telehealth prescribing of NAD+ has started at Promise Peptides (mypromise.com), where each case goes to a clinician licensed in the U.S. for an individual decision. That service is confined to U.S. patients, and the options offered depend on the patient’s state and the treatment being considered; a consultation may end without a prescription. The distinction still matters: which regulatory lane a given NAD+ product occupies, supplement shelf, clinic menu, or prescription, says more about who is accountable for what is actually in it than anything printed on the label does.
What are liposomal NAD+ and skin patches?
Sellers offer liposomal NAD+, drops, sprays, creams, and patches. Liposomal means NAD+ is packed inside tiny fat shells. Sellers claim that the shells help the body take it in. Few fair human studies have checked that claim. Most human work used NMN or NR pills [4][3]. A smaller body of work used an IV drip [12]. No cited trial found higher blood NAD+ from these other forms. None found a clear health gain. Ask for the human study behind a label claim.
Which trial amounts appear on this page?
This page can’t give medical advice or a dose. Human trials used 250-1200 mg/day of NMN. They used 250-3000 mg/day of NR. One NMN study found the best overall test results at 600 mg/day [3]. Those figures describe research groups. They aren’t a plan for you.
Did trials compare morning and night?
The trials didn’t find a best time of day. People took NMN or NR each day for 8-10 weeks. Researchers checked blood NAD+ across days and weeks [3][4]. Morning use wasn’t compared with night use. The studies can’t give you a proven time.
Did NAD patches work in human studies?
Fair human studies have barely tested patches. The same gap applies to sprays, creams, and drops under the tongue. Most human work used NMN or NR pills [4][3]. IV drips have less support [12]. No cited trial found that a patch raised NAD+. None found better health from a patch.