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Some algae have erroneously been believed to be sources of B12, but they actually contain only vitamin B12-like molecules that have long been mistaken (vitamin B12 analogs)
Supplementing with vitamin B12 lowers homocysteine levels and may improve mood, particularly in response to stress
A balanced diet should provide most individuals with adequate vitamin B12 levels, and supplementation in the form of oral supplements or patches may be sufficient for those with specific dietary limitations or absorption issues
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