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Photo by st8geek (Flickr) |
Vitamin A
It is an unsaturated organic compound that includes retinol, retinal, retinoic acid, and beta-carotene.
Functions:
- Maintenance of healthy skin
- For growth and development
- Maintenance of the immune system
- For good vision.
Vitamin A is needed by the retina of the eye in the form of retinal, which combines with protein opsin to form rhodopsin, the light absorbing molecule that is necessary for low-light and color vision.
Sources:
• carrot • papaya
• cod liver oil • mango
• turkey liver • pea
• fish liver • milk
• chicken liver • tomato
• dandelion greens • broccoli
• sweet potato • seaweed
• butter • kale
• spinach • pumpkin
• cheddar cheese • melon
• egg • apricot
Since Vitamin A is fat soluble, disposing of any excess taken in through diet takes much longer than with water soluble vitamins. This allows for more toxic levels of Vitamin A to accumulate. However, in general, acute toxicity occurs at high doses like 25,000 IU/kg of body weight which can be too far to happen.
Vitamin E
It is a fat soluble Vitamin compounds that include tocopherols and tocotrienols.
Functions:
- Prevents propagation of free radicals
- Prevents cells from oxidative damage
- Inhibits platelet aggregation
- Slows progression of dementia
• corn oil • soybean oil
• margarine • almond
• hazelnut • palm oil
• wheatgerm oil • sunflower oil
• safflower oil • dressings
• spinach • turnip
• papaya • dandelion greens
• avocado • asparagus
• kiwifruit • broccoli
• pumpkin • sweet potato
• mango • tomato
Vitamin E acts as an anticoagulant, which may increase the risk of bleeding problem. Agencies set a tolerable intake level at 1,500 IU/day.
Vitamin C
Also called Ascorbic Acid, a water soluble essential nutrient for humans and certain other animal species. It is the most widely taken nutritional supplement.
Functions:
- Antioxidant
- Helps in wound healing
- Treatment of scurvy
- Helps normalise blood pressure
Sources:
• papaya • rosehip
• chilli pepper • red currant
• guava • brussel sprouts
• black currant • goji
• parsley • lychee
• papaya • kiwifruit
• broccoli • kale
• melon • tangerine
• garlic • mandarin orange
• grapefruit • passionfruit
• mango • potato
• blackberry • tomato
Vitamin C is water soluble. With dietary excess not absorbed and excess in the blood is rapidly excreted in the urine. It exhibits remarkably low toxicity. A dose of 80mg to 250mg per day is okay.
Eat a lot of fruits and vegetables such as mango, papaya, tomato and broccoli to save yourself from buying vitamin supplements.
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