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Caffeine "Heart palpitations are a potential concern with supplements containing green tea, guarana, yerba mate, or kola nut all ingredients that naturally contain caffeine," says Tod Cooperman, MD, the president of ConsumerLab, an independent testing company in White Plains, New York, focused on health and nutrition products
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Despite annual monitoring for normocytic anemia, her critically low vitamin B12 levels ( 1000 IU/mL) [16]
Injections offer superior bioavailability compared to oral supplements, as they bypass the digestive system and deliver B12 directly into the bloodstream to fuel your body
Vitamin B12 has been shown to improve the depth and quality of sleep within studies
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