yok4dYok3D ® is the ultimate non-stimulant Nitic Oxide stimulator developed by USP Labs. The main ingredient in Yok3D ® is Inositol-stabilized Citrul Silicate (Citrul Silicate as Nitro-Rx ®), a proprietary complex of bonded arginineI went out on a limb and decided to give Yok3d by USPlabs a go this week during German Volume Training. Yok3d is a capsule form, Nitric Oxide manipulating pre-work