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10.1186/s40168-017-0261-y 122 NambaT.NolteC
Regular testing for nutrient levels can help identify any deficiencies early on
Some studies suggest that vitamin D helps reduce the risk of certain cancers, improves heart health, and boosts mood and cognitive function
The sealed, sterile environment is stable
Some more conservative guides note several months to a few years depending on formulation and conditions
