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Instead, researchers combine multiple materials to analyze complex biological responses
A person may prefer to only purchase supplements that have expiration dates
Many people feel the effects within hours, with increased energy and mental clarity often noticeable the same day
Due to the limited data, it should be avoided by anyone who is pregnant, breastfeeding, or undergoing active cancer treatment
Pregnant women who eat little or no animal protein are at particular risk, and B12 supplementation during pregnancy is increasingly recognized as important in clinical guidelines
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