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Title: Doesn't work as well as Corvalen
Review: D-ribose really helps with my energy levels! I started taking D-Ribose with the Corvalen brand which is great, but very expensive. So, I've tried two other brands now (Vitamin Shoppe and Now) and my energy level fell a little on both of the other brands. So, even though this is a good price, I notice more of a positive difference with my Corvalen.
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