Definitely check out the comparative guide, it makes it pretty obvious that a vast majority of supplements on the market, here in New Zealand, in the USA and everywhere else, are highly inadequate. I own a copy of the guide, and Centrum, for example got a score of around 4.0 out of 100. Many of the most well-known brands have the poorest ratings, as their budgets are going towards marketing rather than R & D.
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