I'm experimenting with the nasal mist form of NAD+. I just started, and am only doing one spray at the moment, to see how I tolerate it. The mist goes into the upper nasal passages and sinus cavities, where it gets absorbed quickly. I plan on starting a thread to share my observations and experiences, as I will be increasing from the 12.5mg dose I now take daily, to the usual 25mg starting dose.
Some inject it, some use an oral spray or sublingual lozenges, some use the nasal mist. I've been reading about it on Reddit and other forums as well. Most find that doing self injections or using the nasal mist, are the best way to inexpensively increase NAD+ in the body. Feedback from the majority injecting 25mg to 50 mg daily, or using the nasal mist from 25mg to 50mg daily, has been mostly positive. It takes consistent use to build up NAD+ to therapeutic levels, then one can get by on regular maintenance doses.