Why NAD+ needs buffering in the first place
Dissolved NAD+ is acidic, and that's why it has a reputation as one of the more uncomfortable things people inject. Vendor pages and user reports put the sting down to that acidity, not to a mixing mistake.
The fix isn't unique to NAD+. Buffering an acidic injection with something alkaline (like sodium bicarbonate, which is baking soda) to bring it closer to neutral is common in medicine. Dentists and doctors do the same thing with numbing shots, adding sodium bicarbonate to make the injection hurt less. Buffered NAD+ applies the same idea: a buffering agent such as sodium bicarbonate is mixed in to raise the pH, which is what takes the edge off.
How to tell if a vial is actually buffered
Look for the word "buffered" on the label or in the listing itself, then check that the ingredient notes back it up. Of the 36 vendors we track for NAD+, 7 list a buffered version, and every one of them says so right in the listing name ("NAD+ 500mg Buffered," for example). If "buffered" isn't in the listing name or the product details, assume it isn't. If you're mixing it yourself, the bacteriostatic water (the sterile water most people mix with) doesn't buffer it, so a plain vial stays plain unless you add a buffer yourself.
| What you're checking | Buffered | Unbuffered |
|---|---|---|
| On the label | Says "buffered" outright | No buffering mentioned |
| Reported injection feel | Milder sting, in user reports | Noticeable burn is the common report |
| NAD+ content per vial | Same as labeled | Same as labeled |
Whichever version you're looking at, checking the certificate of analysis against what's advertised is the same vetting step either way. How to read a COA covers what that document should actually show you.
What it changes for your dose and your order
Buffering doesn't add or remove NAD+, so the milligram amount on a buffered vial means exactly what it says, the same as an unbuffered one, and nothing about the NAD+ dosing patterns people describe changes because the vial happens to be buffered.
Buffered and plain NAD+ come from different vendors at different prices, so if comfort is the whole reason you're considering it, compare both per milligram on the NAD+ page before you decide.
It's sold for research, and the big human trials haven't been run yet. You knew that, it's why you're reading this and not the label.
Questions people ask
Is buffered NAD+ better than non-buffered NAD+?
Not in terms of effect. The NAD+ content is the same either way, so buffering is about comfort at the injection site rather than a stronger or different result.
What is used to buffer NAD+?
Sodium bicarbonate is the buffering agent used most often, added either when the vendor makes the powder or when you mix it with water, to raise the solution's pH.
Does buffering change the NAD+ dose?
No. Buffering adjusts pH, not the amount of NAD+ in the vial, so a buffered vial still holds the amount of NAD+ printed on its label.
Can you buffer NAD+ yourself at home?
Some people add their own sodium bicarbonate when mixing, but the ratio is easy to get wrong, and a pre-buffered vial takes the guesswork out.
Does buffered NAD+ still sting?
Users report noticeably less stinging or burning than with unbuffered NAD+, though injection speed and technique still matter, and a completely pain-free injection isn't guaranteed.