It combines raw turmeric powder with several different extracts. Very potent and easy to digest.

The recommended dose (two pills, 2-3 times per day) should have noticeable effects for you within a week or so.

Too much B is indeed bad for you. You don't want Mountain Dew-colored piss all day every day. Absent that, you're probably fine. Whatever is included with your mutlti-vitamin is almost certainly enough.

Bromelain is usually in a compressed solid tablet form. Loose powders and teas are usually not the best way to take supplements -- look for solid tablets/pills, gelcaps, and vegicaps.