Ben Justman🍷 · 5w Blood sugar crashes from alcohol cause headaches. The Glycemic Index is a measure of how fast a drink spikes your blood sugar, with pure sugar rating at 100. Beer: 66-110 Dry Red Wine: 0-5 Tequila S... nout @nout 1776236345 Some beer causes headaches, some beer doesn't. Verifiably. 1❤️1