causal
Analysis v1
Strong Support
People with low vitamin B12 often feel super tired, and in one study, two out of three did. After getting weekly B12 shots for six weeks, most of them said their tiredness got way better.
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Evidence from Studies
Supporting (1)
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Community contributions welcome
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The study found that 66.7% of people with low B12 felt very tired, and after getting weekly B12 shots for six weeks, their health got much better — so it’s very likely their tiredness went down a lot too.
Contradicting (0)
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Community contributions welcome
No contradicting evidence found
Gold Standard Evidence Needed
According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.