For females this would usually be finished in about 1 hour 15minutes. For males this would be finished in about 1 hour. Olympic distance triathlon (1500m / 40m bike / 10km run) For females this would take about 2 hours 25mins. For males this would take about 2 hours. Half Ironman (1.9km swim / 90km bike / 21km run) Females usually take about 5 hours 30mins.
Zinc. Night blindness may also be the result of a zinc deficiency which reduces the activity of an enzyme that helps the body produce vitamin A (retinol dehydrogenase). Research has shown that taking a zinc supplement is helpful. Healthcare providers often recommend 15 - 30 mg of zinc daily for vision.
Vitamin B5 (pantothenic acid): Deficiencies of this vitamin are rare, but may lead to symptoms of fatigue and depression. Vitamin B6 (pyridoxine): This vitamin helps your body process amino acids, which are the building blocks of all proteins and some hormones. It is needed to make serotonin, melatonin and dopamine. Vitamin B6 deficiencies, although very rare, cause impaired immunity, skin lesions, and mental confusion.