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However, there have been cases of people breaking out into acne and rosacea and having heart palpitations after taking very high doses of vitamin B12, usually by injection
These effects occur in a minority of users and rarely require stopping
B12 given intravenously provide a concentrated dose of B12 directly to the bloodstream or muscle via injection
Interaction with fasting and ketosis Both fasting and ketogenic diets increase NAD+ levels through various mechanisms
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