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8 votes
Accepted

Any studies linking vitamin B12, melatonin, and sleep

Those who can't get to sleep at night may need vitamin B12. Studies show that B12 causes an earlier release of melatonin at night which resets the sleep-wake cycle. (Melatonin has been called "the ...
chiliNUT's user avatar
  • 196
6 votes
Accepted

Can too much B12 be harmful?

As you said, B12 is highly soluble in water and unused quantity is easily excreted from the body as urine. Therefore, it is nearly impossible to get an overdose of B12, even if you exceed the ...
Niitaku's user avatar
  • 2,491
4 votes

Are calcium supplements harmful compared to calcium in whole foods?

There is a PDF here Meeting Calcium Recommendations on a Vegan Diet There are many plant-based sources of calcium including certain leafy green vegetables, broccoli, some types of tofu, almonds, ...
Panther's user avatar
  • 421
2 votes

Can too much B12 be harmful?

Some sources express concern about taking too much B12 in supplements. Others disagree and claim that it's perfectly safe. Google "b12 overdose" and read some articles for yourself, there's too much ...
Alex Hall's user avatar
  • 2,434

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