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.
Vitamins for the Eyes. Vitamins are classified as either fat-soluble or water-soluble. Fat-soluble vitamins are stored in the body and include A, D, E, and K, while the water-soluble vitamins, C and B, are flushed from your body and need to be replaced daily.Taking eye vitamins can help us to maintain the health of our eyes. Vitamin E: Like vitamin C, vitamin E is found in the lens of the eye. 2  It is also a major player in the bodyâs antioxidant defense system. 3  Because it is found in the eyeâs lens, it is believed to help prevent cataracts. 4  Vitamin E is also found in the retina, and is said to help prevent macular degeneration.