NAD+ vs NAD+ / B Complex
Written by Aaron CuhaReviewed Sep 2026
The short answer
An NAD+ drip against the same drip with B vitamins added. By weight the B12 is a rounding error, roughly one B12 molecule for every thousand NAD+ molecules at typical clinic doses. The one trial of a vitamin drip against a dummy drip found no real difference from plain salt water drip, lactated Ringer's, on any result.
- NAD+ people
- 0
- NAD+ nulls
- 0
- NAD+ / B Complex people
- 34
- NAD+ / B Complex nulls
- 2
Dose
No human dose established
Amounts that were given in studies sit in Human evidence on this page. None of them is a personal dose.
1 completed trial, 0 people given it
Dose
No human dose established
Amounts that were given in studies sit in Human evidence on this page. None of them is a personal dose.
5 completed trials, 34 people given it
First-hand reports are counted on each profile and never added together. This page sets two published records side by side. It does not pick a winner.
Column A
NAD+Nicotinamide Adenine Dinucleotide
A helper molecule every cell needs to make energy. It is sold as drips and shots for anti-aging and recovery. Levels fall with age, but there is little proof that topping it up helps.
Column B
NAD+ / B ComplexInjectable NAD+ blended with vitamin B12 and sometimes B6
Injectable NAD+ mixed with B12, and sometimes B6, sold as a clinic drip or as a vial for shots under the skin. No study has tested the mix. By weight, the B12 barely registers. In a typical 500 mg NAD+ drip with a 1,000 microgram B12 add-on, B12 is about 0.2 percent of the active ingredients. That is roughly one B12 molecule for every thousand NAD+ molecules. The one trial of a vitamin drip against a plain fluid drip (lactated Ringer's) found no clear difference on anything it measured.
Side by side, on the facts we can check
| What we compare | NAD+ | NAD+ / B Complex |
|---|---|---|
| Category | Longevity | Longevity |
| FDA status | Not an approved drug; sold by compounding pharmacies and as supplements | Not approved as a blend. B12 shots are approved for B12 deficiency. NAD+ is not an approved drug. It reaches patients through pharmacy mixing and drip (IV) clinics. |
| Half-life | Short | Not one number. The two parts leave the body on completely different timescales, one within hours and the other held in the liver for months. |
| Molecular weight | 663.4 Da | Mixture; NAD+ 663.4 Da, vitamin B12 1,355.4 Da |
| How it works | It carries electrons, a key step in turning food into energy. Sirtuins and PARPs, enzymes linked to ageing and DNA repair, use it up as they work. The idea is that raising NAD+ helps mitochondria, the cell's power plants, and helps cells repair themselves. | NAD+ is a helper molecule cells use to make energy. It also feeds enzymes called sirtuins, PARPs and CD38. Levels in tissue fall with age, and that is the whole basis of the marketing. B12 helps two enzymes do their jobs, which is why fixing a shortage lowers homocysteine and methylmalonic acid. B6, in its active form, helps the body process protein building blocks. The three are mixed on the idea that energy pathways in cells add up. Nobody has tested that idea. And nobody has even suggested a way B12 would help NAD+ get where it is going, or the other way round. |
| Studies in people | 1 | 5 |
| Evidence | Limited: 1 completed trial, none stating how many people | Limited: 5 completed trials, 34 people given it |
| Legal status, US | Not FDA-approved; compounded drip (IV) and supplement forms are sold | No approved blend; injectable B12 alone is approved for deficiency |
Frequently asked questions
What is the difference between NAD+ and NAD+ / B Complex?
NAD+: A helper molecule every cell needs to make energy. It is sold as drips and shots for anti-aging and recovery. Levels fall with age, but there is little proof that topping it up helps. NAD+ / B Complex: Injectable NAD+ mixed with B12, and sometimes B6, sold as a clinic drip or as a vial for shots under the skin. No study has tested the mix. By weight, the B12 barely registers. In a typical 500 mg NAD+ drip with a 1,000 microgram B12 add-on, B12 is about 0.2 percent of the active ingredients. That is roughly one B12 molecule for every thousand NAD+ molecules. The one trial of a vitamin drip against a plain fluid drip (lactated Ringer's) found no clear difference on anything it measured.
Which has stronger research evidence, NAD+ or NAD+ / B Complex?
Each compound gets a band worked out from facts we counted, with the math shown. NAD+ is Limited (1 completed trial, none stating how many people). NAD+ / B Complex is Limited (5 completed trials, 34 people given it). That counts how much has been done in people. It does not rate whether either one works, and neither one is called the winner.
Are NAD+ and NAD+ / B Complex FDA-approved?
NAD+: Not an approved drug; sold by compounding pharmacies and as supplements. NAD+ / B Complex: Not approved as a blend. B12 shots are approved for B12 deficiency. NAD+ is not an approved drug. It reaches patients through pharmacy mixing and drip (IV) clinics..
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Reviewed Sep 2026. This page puts two published records side by side. It is for learning, and it is not medical advice. When this site shows a dose, it is the dose a trial or a clinic actually used, or what people say they did, with the source attached. None of it tells you what to take.