I just did a search on the write up searching for terms "N.O." and "Nitric Oxide" with no results. I don't think that was ever claimed.
In addition to these effects, by inhibiting other subtypes of phosphodiesterase a vasodilatory effect can occur, allowing for increased amino acid and glucose transport to skeletal muscle, as demonstrated in various animal & human studies & review papers (2,14-17).
Pumped To The Gills While Cutting?
In addition, this vasodilatory effect can potentially lead to greater "pumps" and the feeling of fuller muscles, while also potentially increasing lipolysis (2,18).
Keeps Going Like That Bunny
Unlike various nitric oxide (NO) products which can lose their effectiveness over time, these compounds will not do so.
Synergystic with Nitric Oxide Products?
In fact, as demonstrated in animal models, these compounds may prevent N.O. products from losing their effectiveness in the first place (19-23).