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Some experts advocate for higher levels in specific populations, but evidence for additional benefits above 50 ng/mL is limited
A 1% serum in an opaque airless bottle with a clean formula will usually outperform a poorly stabilized 3% serum that has oxidized on a shelf
It's tough
Even those who have no apparent gastrointestinal symptoms may have a leaky gut, and addressing gut function might be the best place to start to bring healing to the body
If left untreated, vitamin B12 deficiency can lead to anemia, nerve damage and more, warns Taylor
The majority of findings rely on in vitro experiments and animal models, which limits the ability to generalize results beyond controlled research environments
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