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Vitamin D and probiotics may work synergistically to improve athletic recovery, metabolic dysfunction, and disease outcomes

An overdose of vitamin B12 through diet is hardly possible and also not known, since the required transport protein IF (intrinsic factor) and absorption via the intestinal mucosa are two major barriers

Normally its almost painless but I really feel it today

Competitive chemiluminescent enzyme immunoassay for vitamin B12 analysis in human milk

Exhaustion, fatigue and feeling tired no matter how much sleep you get Anxiety Constant low mood Muscle weakness Brain fog and forgetfulness Irritability, uncontrollable mood swings, and feeling like youre low and flat Feeling cold or lightheaded Pins and needles or tingling in your fingers and toes Dull, brittle hair, and weak nails that crack easily Red sore tongue and mouth ulcers Shortness of breath, heart palpitations, and rapid heartbeat Nausea, poor appetite So why am I deficient in B12