The Patch - Vitamin Injections London's Vitamin D3 Patches, which provide a slow release of 1250ug vitamin D, 250mg magnesium and 120mg Vitamin K2 directly into the bloodstream - all of which aid energy. Three weeks in, I'm a convert. More than anything, the ritual of putting the little brown patch on my arm every morning has made me more mindful about how I look after myself. Placebo effect or not, I've noticed a mental shift, so I'll be wearing these until the sun returns.