NAD+ won't pass through any filter - what's going on?

[Tone-Tale]

Every peptide gets filtered around here, but for some reason nad+ just refuses to pass through. Tried a few different filters and even diluted it further with more bac water than usual. Anyone have suggestions for what might actually work here?

 

[Slim_Squad]

Had the exact same issue with a batch of NAD+ a while back, turned out that specific one had something in it that wasn't playing nice with standard filters. Worth checking if yours came from a source that's had complaints before, this isn't the first time I've seen this exact thing reported.