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a decrease in sperm motility (due to mitochondria damage resulting in a reduction in ATP [energy], and damage to the tail a decrease in sperm viability (how long they remain alive) an increase in mid-piece morphology defects (comprised of mostly mitochondria) deleterious effects on sperm capacitation and acrosome reaction (aka sperms ability to fertilize the egg) increased sperm DNA damage and apoptosis (cell death) And could contribute to possible birth defects It should be noted that almost all human ejaculate contains reactive oxygen species (ROS), primarily produced from the above-mentioned lifestyle and environmental factors ( consumption of sugars and oxidized vegetable oils, smoking, alcohol, exposure to environmental toxins, high or chronic emotional stress, circadian rhythm dysregulation (poor sleep), lack of exercise, infections, and a lack of antioxidant intake ), as well as from abnormally shaped sperm present (meaning, if there is a high % of abnormally shaped sperm, or poor morphology, more reactive oxygen species (ROS) will be present, and these days, most sperm samples contain a large % of abnormally shaped sperm)

A case study involving a 1-year-old girl treated for Vitamin B12 deficiency reported the onset of involuntary myoclonic movements after starting intramuscular Vitamin B12 therapy
2 (download ZIP Source data Extended Data Fig
Int J Reprod Biomed (Yazd)
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