Intermittent fasting has made one question explode in popularity: If I take a mushroom tincture during my fasting window… did I just ruin my fast? The honest answer is: it depends on what kind of fast you’re doing , and what you’re trying to get out of it. In this guide, I’ll break it down in plain English, including the one detail most people forget: mushroom tinctures contain alcohol (by design), and alcohol has calories. I’ll also explain the simplest “do this, not that”