NOS Assist (Nit-Ox Boost) is designed for those with symptoms of low nitric oxide production including erectile dysfunction, cold hands, feet, and high blood pressure. Symptoms may occur in those with or without the NOS enzyme variant or in those with genetic variants that lower BH4. This product contains nutrients and herbs such as beet root and hawthorne that support NO production and the NOS enzyme, which converts L-arginine into nitric oxide. Importantly, this product does not contain L-arginine, as during states of poor health (when NOS uncoupling is present) it may convert into the harmful peroxynitrite instead of converting to NO. This product may be warranted for those with low nitric oxide (saliva test strips), low BH4 and/or high peroxynitrite. This product pairs well with NADPH Assist and B-Specific, as B2 is the precursor of two coenzymes known as flavin mononucleotide (FMN) and flavin adenine dinucleotide (FAD) which in addition to NADPH, heme and oxygen are cofactors for NOS enzyme.