I don't know if you count throwing up as a side effect, but it took awhile for my stomach to adjust. Here's what I'm taking in terms of vitamins/minerals/herbs: fish oil, green tea, kelp, chromium picolinate, CLA, magnesium, zinc. lecithen, vitamin c, calcium, tribulus/avena sativa, papaya enzyme, alpha lipoic acid, yohimbe, B6, cinammon, milk thistle. No ill effects to report.