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It's probably all degraded to NAM no matter what the dose. But that doesn't matter as NAM raises NAD+ very nicely. Any perceived advantage of NR over NAM (or NAM+R, especially) is purely marketing. A second problem is daily use. This will suppress mito mass and result in lower ATP output. NR or NAM+R should thus be used intermittently, and/or with PQQ.
We found a clear advantage of several ratios of NAM+R over NR, with a 1:4.5 ratio of NAM to R respectively, producing a 26.5% advantage in NAD production in an animal model. An equimolar comparision is unquestionably in favor of NAM+R.
