[Nicotine]

[[nicotine]]

Also Niacinamide (B3) aka Nicotinamide.
Niacinamide provides energy to the mitochondrial system, playing a very important role in metabolism. Essential for the functioning of the electron transport chain in the mitochondria of the cells (to make energy).
Precursor to NAD+ … What is NAD+?
Niacinamide serves as a reliable precursor to NAD+ (nicotinamide adenine dinucleotide) which is a signalling molecule found in all living cells that plays a vitally important role in the conversion of food to energy, repairing damaged DNA, improving cell function and optimising cell survival and lifespan
https://www.saturee.com.au/blogs/blog-posts/niacinamide-a-key-energy-promoting-life-supportive-substance

Niacinamide is the precursor to NAD+, which is a proton acceptor that is constantly recycled from NAD+ to NADH. It is fundamental to energy generation in the cell.