Natural Remedies for Immunity
Vitamin
A
Natural Sources for Vitamin A
Vitamin A is found naturally in animal sources, such as liver, fish liver oil, eggs, and fortified whole-milk products. Half a pound of calf's liver contains almost 75,000 lUs of preformed vitamin A. The following is a list of vegetarian sources of Vitamin A.
| Food Source |
Amount
(Quantity) |
Vitamin A
Content IU |
| Apricots |
3 |
2,769 |
| Avocado |
1 |
1,230 |
| Broccoli (cooked) |
1 spear |
2,537 |
| Cantaloupe |
1/4 |
4,304 |
| Carrot (raw) |
1 |
20,253 |
| Carrot (cooked, sliced) |
1/2 cup |
19,150 |
| Kale (cooked) |
1/2 cup |
4,810 |
| Nectarine |
1 |
1,007 |
| Papaya |
1 |
6,197 |
| Spinach (cooked) |
1/2 cup |
7,363 |
| Squash, winter, butternut (cooked) |
1/2 cup |
7,124 |
| Sweet potato (baked) |
1 |
24,867 |
| Tomato (raw) |
1 |
1,528 |
| Turnip greens (cooked) |
1/2 cup |
3,943 |
| Watermelon |
1/16 slice |
1,758 |
Dosage Recommendations
If you are prone to infections, take 10,000 IU of vitamin A daily.
During an infection, brief high doses of vitamin A-50,000 to 100,000 IU for a couple of days-can strengthen epithelial cells and resistance in both adults and children.
If you're planning to have a baby or are pregnant, don't take supplements with more than 5,000 IU of vitamin A.
Safety and Toxicity
Vitamin A toxicity generally doesn't occur unless someone consumes and stores more than l,000,000 IU in a two- to three-week period.
Sometimes, overdoses can occur when people take 50,000 to 100,000 IU daily for several months. Dosages over 10,000 IU can cause toxicity in young children. Those with any form of liver disease should not take more than 10,000 IU daily from all sources.
Symptoms of Vitamin A
Toxicity include: