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It may also cause lightheadedness and dizziness

124,125 Another clinical trial found dark chocolate consumption blunted the rise in D-dimer levels caused by an experimental psychological stressor in healthy men

Due to the nature of gastric bypass surgerythe intestinal tract is modified or diverted, less space is left in the stomach for calorie absorption, but also for the absorption of nutrients like vitamin B12

3 The UK National Institute for Health and Care Excellence (NICE) states that a cut-off of 200 ng/l identifies 97% of people with B12 deficiency, and a level below 100 ng/l is usually accompanied by metabolic or clinical evidence of B12 deficiency

doi: 10.1128/MCB.23.22.7973-7981.2003