Can Vitamin D be toxic if you take to much?

Can one take too much beta carotien or vitamin A?

• a friend is taking 2500 UI twice a day of vitamin A, and and 2500 UI of beta carotene twice a day. it is helping with her eye site she is aprox. 70 years old. on top of that she is also taking and extra vitamin supplement of of 12,500 UI of beta carotene and 7,500 UI vitamin twice of vitamin A.. it is helping her eyesight. but can all of this in excess hurt her. the question is "what is too much" thanx lynne

• Answer:

  Normal requirements of these supplements are 1000 UI and day for men and 800 UI daily for women. (depending on what doctor you talk to) This is just what the body should have each day. However, some doctors will recommend up to 25,000 UI a day for some ailments that effect the eyes and in some cases up to 100,000 UI a day. It just depends on the problem one is having with the eyes. However, this dosage is only recommend to take one time a day for 10 to 30 days. Too much vitamin A can cause liver abnormalities, and reduced bone mineral density (complications of osteoporosis ). Too much can cause nausea, vomiting, blurry vision, headache, dizziness, and muscular uncordinations......