Our expert says:
Night blindness may be an early sign of vitamin A deficiency. Doctors often recommend 10,000 to 25,000 IU of vitamin A per day to correct a deficiency. Beta-carotene is less effective at correcting vitamin A deficiency than is vitamin A itself, because it is not absorbed as well and is only slowly converted by the body into vitamin A.
Dietary zinc deficiency is common. Your zinc supplement is sufficient for this. Zinc helps night blindness in people who are zinc-deficient;1 therefore, many physicians suggest 15 to 30 mg of zinc per day to support healthy vision.
Should this not be effective you should speak to your doctor.
Unless you have a decreased liver function taking these should be okay
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