Not sure whether NAD+ injections or nasal spray is the smarter fit for your goals? The two delivery methods work very differently. Injections bypass the digestive system entirely and deliver NAD+ straight into circulation, which is often viewed as the more direct, systemic option but it comes with needles, higher costs, and more clinical oversight. Nasal spray skips the needle altogether, absorbing through nasal tissue for a quicker, more portable daily routine, though results can vary depending on formulation and technique.
Neither option has been proven conclusively superior for energy, focus, or healthy aging, the science is still developing. This guide walks through absorption rates, potential side effects, pricing, and who tends to prefer each method, giving you the full picture before you talk to a healthcare provider about starting NAD+ therapy.
