double wood acetyl l carnitine L-CARNITINE 500 mg Double Wood - Acetyl L-Carnitine

It definitely feels like a vasodilator

Zimmerman says her mom was swayed by the sign on the clinics storefront, which promoted high-dose vitamin B12 injections to improve energy and memory

doi: 10.1038/nn.2250

Zouari M, Ahmed CB, Zorrig W, Elloumi N, Rabhi M, Delmail D, Abdallah FB (2016) Exogenous proline mediates alleviation of cadmium stress by promoting photosynthetic activity, water status and antioxidative enzymes activities of young date palm (Phoenix dactylifera L.)

But because its derived from vitamin A (which is vital but in large doses can be dangerous), its also very potent and has the potential to be systemically toxic on the system, and thats why it needs careful monitoring and a thoughtful recovery plan once treatment ends