Just make sure when you buy a bottle that 1) the expiration date is current enough to use when you receive it and 2) that the safety seal matches the picture. This should be said of any supplement you purchase online,though. You will likely never get a cold or a flu when you are taking this. It's a huge discovery in the medical world. Read up on it - the story of how it was discovered is amazing!
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Excelente producto a un mejor precio.
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