Nutricost Nitric Oxide Booster (2250mg) 90 Capsules - Gluten Free, Non-GMO, 750mg Per Casule, 30 Servings

Works surprisingly well in terms of a specific male concern (frequency and level of stiffness). But for those with Autism Spectrum Disorder or MTHFR, I recommend to research it thoroughly first, From what I understand (consult your doctor though), a common BH4 deficiency can cause Nitric Oxide to turn into Peroxynitrite - a highly reactive and toxic molecule that can damage cells and contribute to inflammation and neurological dysfunction. Hydroxycobalamin and methylfolate (high quality forms of B vitamins) and sulforaphane (from raw broccoli and broccoli sprouts) in sufficient amounts might help to balance this out. A good reminder that just because a supplement requires no prescription does not mean it will automatically be suitable for everyone.