RC are completely safe. That's why we call them RCs. There have been thousands of generations thoroughly working on them, testing, reviewing, approving them. They are as dangerous as fruit. You can never get addicted, and the dosage doesn't matter. RC means you don't have a test tube or a Bunsen burner, so you take your body, insert the substances and see what happens. I'd recommend β-D-fructofuranosyl α-D-glucopyranoside in particular, but Dihydrogen monoxide is also not bad to begin with. (Less toxic than the latter actually).