Proton Pump Inhititors such as Prevacid, Prilosec, Nexium etc. are PPI's prescribed for the treatment of high blood pressure, acid indegestion, etc.

PPI's inhibit the cells' ability to transfer protons (hydrogen ions) through the cell membrane thus decreasing their ability to acidify. This has the effect of reducing stomach acid, and also has the effect of making the body more alkaline (more slippery) and thus allowing the blood to flow easier through the blood vessels.

There are, however, side effects such as preventing the proper breakdown of food that can thus affect the microbiome, and preventing the assimilation of minerals such as calcium and magnesium, that can outweigh the perceived benefits, as explained in the below videos.

A more natural way to alkaline the body would be to consume less acidic foods i.e. animal products, meat and dairy etc., and consume more alkaline foods i.e. fruit, nuts and vegetables. Also reducing high glycemic, glucose producing foods such as pasta, factory bread, pastries, etc. will help to reduce blood sugar levels thus resulting in reduced inflammation of the blood vessels. Thus allowing improved blood flow.