How to Use Chocolate, 1672

Nicolas de Blegny, Le bon usage du thé, du caffé, et du chocolat (1687)

It revives the drooping spirits, and chears those that are ready to faint; expelling sorrow, trouble, care, and all perturbations of the minde; it is an Ambrosia: And finally, in a word, it cannot be too much praised… [It] keepeth the body fat and plump; and also preserveth the countenance fresh and fair… and certain it is, that a man may live longer with it, then with any kinde of Wine whatsoever… It is a great Cordial… strengthening the natural heat in all parts, and thereby prolonging life; for it is by an easie transmutation converted into blood. It preserveth in vigour the principal faculties, enabling men to prosecute their Studies and tedious exercises, expelling winde, opening obstructions… and is most excellent against Hypochondriack melancholy.

William Hughes, The American Physitian

Revives drooping spirits? Check. Prolongs life? Check. Turns into blood? Apparently.