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Mood changes, including low mood or irritability
GHK-Cu may produce similar effects as dormant follicles activate
If you're experiencing symptoms of deficiency, follow a plant-based diet, are over 50, or take medications that interfere with B12, annual testing is a good idea
Schijns W, Homan J, van der Meer L et al (2018) efficacy of oral compared with intramuscular vitamin B-12 supplementation after Roux-en-Y gastric bypass: a randomized controlled trial
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