There already are plenty of alternative "alcohols" many of which apparently have cleaner/less toxic metabolic paths (in humans). People experiment with them and

There already are plenty of alternative "alcohols" many of which apparently have cleaner/less toxic metabolic paths (in humans). People experiment with them and you can read about them on various forums. From what I've read most of them dont taste that good, or are expensive, hard to come by etc and theres no clear upgrade.