I have routinely taken an amino acid complex for years, just to augment my protein intake; however, as far as I know, that did not improve my tendency for afib, most likely because I have always had an optimal, quality protein intake and no deficits were noted on the various metabolic profile tests so we concluded that wasn't the source of my initiators.
If one is looking to boost nitrogen with supplements, the best option for efficacy via the resultant nitric oxide benefit would be with L-arginine and/or L-citrulline. Do research on the benefits overall by increasing nitric oxide production.
Start with the book by Louis J. Ignarro, PhD who, along with research colleagues, received a Nobel Laureate in Medicine for their research on using NO for heart health.... titled
NO More Heart Disease which details the benefits of NO to the cardiovascular system. (NO, meaning Nitric Oxide)
Also refer to the findings of Nathan Bryan, PhD who talks about the "miracle molecule" in his book,
The Nitric Oxide Solution. [
www.google.com]
This search of past posts on the topic is worth noting for more details:
[
www.afibbers.org]
Jackie