Peptides & longevity

NAD+ injection vs spray

A shot skips the gut. A nasal spray avoids needles. Neither has strong evidence for energy, recovery, or aging benefits.

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NAD+ injection
Subcutaneous or IM
Coenzyme
vs
N
NAD+ spray
Intranasal
Coenzyme

NAD+ is a coenzyme, a helper molecule your cells need to make energy. Your body needs NAD+, but that doesn't prove NAD+ shots or sprays improve energy, recovery, or aging. If you and your clinician decide to try it, the route mostly comes down to comfort and side effects.

Side by side.

 
NAD+ injection
NAD+ spray
Route
Under the skin or into a muscle
Absorbed through the lining of the nose
Absorption
Goes in under the skin or into a muscle; skips the gut
Nasal absorption varies and isn't well studied
Convenience
You need to learn to give a shot
Pump and inhale; no needles
Proven benefit
Not established
Not established
Typical dose
100–500 mg per session
50–100 mg per session
Side effects
Flushing, headache, nausea, and reactions where you inject; report any reaction
Nose irritation; report any reaction

Who picks which.

NAD+ injection
  • You don't mind needles
  • You're already used to giving yourself shots for a GLP-1 or peptides
Explore compounded NAD+ injection
NAD+ spray
  • You don't like needles
  • You'd rather use a spray than a shot
Our verdict

Neither route has been shown to improve energy, recovery, or aging. If you and your clinician decide to try NAD+, the choice mostly comes down to comfort with needles and how you handle side effects. Persistent tiredness deserves a check for its cause first.

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Prescription treatments need an online visit. A U.S.-licensed provider reviews it and decides if a treatment is medically right for you. Compounded medicines are made by licensed U.S. pharmacies and are not FDA-approved. Individual results vary.

Common questions.

How often should I dose?
Your clinician sets the dose and schedule for the exact product. Don't change it on your own.
Is oral NAD+ a real alternative?
NAD+ by mouth is poorly absorbed. Precursors are building blocks your body turns into NAD+. Oral precursors (NR, NMN) can raise NAD+ levels, but that hasn't been shown to improve energy or aging.

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