The Cause of Internet and TV Addiction?
Note: Always consult with your physician prior to taking any vitamin supplements, or starting a workout or diet program
"A deficiency of vitamin A is not only disease causing, but it can kill [the author probably mentioned this because vitamin A helps to fight off infections such as measles]."
"On the other hand, overdoses of vitamin A are also lethal. The livers of certain animals, especially those adapted to polar environments, often contain amounts of vitamin A that would be toxic to humans."
· Vitamin A supplements, as well as
· Any cosmetic or skin care item containing retinols,
if you are pregnant or trying to conceive - vitamin A can be toxic to the fetus and can cause birth defects."
"Avoid taking mega doses of vitamin A - more than 50,000 IU per day - unless directed to do so by your doctor. Because vitamin A is stored in fatty tissue, it can build up in your body and cause adverse reactions. The recommended dose is 7,500 to 10,000 IU per day."
"If you taking prescription medicine, consult with your doctor or pharmacist before taking supplements."
"Vitamin A is fat soluble and is most commonly found in two forms: preformed vitamin A (or retinol) and beta-carotene."
"The dosage underneath is the Recommended Dietary Allowance (RDA), but be aware that this dosage is the minimum that you require per day, to ward off serious deficiency of this particular nutrient. In the therapeutic use of this nutrient, the dosage is usually increased considerably, but the toxicity level must be kept in mind.
Male 5,000 IU [minimum] per day (1,000 µg equivalent), female 4,000 IU [minimum] per day (800 µg retinol equivalent), although 10,000 IU per day is normally used in supplementation."
"Dosages exceeding 15,000 IU per day must be taken under medical supervision. Toxicity can appear in some individuals at relatively low dosages and the symptoms may include nausea, dizziness, menstrual problems, skin changes and dryness, itchiness, irritability, vomiting, headaches and long term use can cause hair loss, bone and muscle pain, headache, liver damage, and an increase in blood lipid concentrations."
"Pregnant women must be careful as a high intake of this vitamin can cause birth defects."
"[In general] Pro-vitamin A - beta-carotene [carotene is also known as pro-vitamin A] does not cause toxicity. Be careful if you in the unlikely event run across polar bear on a menu - 500 gram (about ˝ a pound) of polar bear liver will deliver about 9,000,000 IU to your diet - a very lethal dose. Headaches, blurred vision, loss of hair, drowsiness and diarrhea, enlargement of the spleen and liver can all be indications when your intake is too high."
"There seems to be no toxicity when ingesting large amounts of beta-carotene - you might however have a slightly orange colored skin, as the carotene gets stored in your skin."
"A deficiency of vitamin A is not only disease causing, but it can kill."
"Deficiency of Vitamin A can cause night-blindness, pale, dry skin."
"A deficiency of vitamin A
· may lead to eye problems with dryness of the conjunctiva and cornea,
· dry skin and hair,
· night blindness as well as
· poor growth.
· Dry itchy eyes that tire easily are normally a warning of too little vitamin A. If the deficiency becomes severe, the cornea can ulcerate and permanent blindness can follow."
· "Abscesses forming in the ear,
· Frequent cold and respiratory infections as well as
· Skin disorders, such as acne, boils and a bumpy skin, as well as
· Weight loss
might be indicative of the vitamin being in short supply.
· Fatigue and
· Reproductive difficulties
may also be indicative of the vitamin in short supply.
· Your hair and scalp can also become dry with a deficiency, especially if protein is also lacking."
"Retinol, Vitamin A or beta-carotene: It has been discovered that beta-carotene protects dark green, yellow and orange vegetables and fruits from solar radiation damage and it is thought that it plays a similar role in human body."
"Retinol, the most useful form of vitamin A, (along with retinal and retinoic acid) is a fat-soluble,
· antioxidant vitamin
· important in vision and bone growth. It is
· sometimes used in the treatment of severe acne.
As can be seen from the structure, this is a compound synthesized from isoprene."
"Vitamin A is needed to
· Maintain healthy skin,
· Prevent night blindness and
· Protect against cancer and other diseases;
· It may also help keep your blood sugar balanced."
· "It also assists your sense of taste
· as well as helping the digestive and urinary tract and many believe that it helps slow aging.
· It is required for development and maintenance of
· is important in the formation of bone and teeth,
· storage of fat and
· the synthesis of protein and glycogen."
"The richest food sources of vitamin A are
· fish liver oil,
· dark green and orange vegetables, and
· milk products."
"Vitamin A is found in:
· sweet potatoes,
· peaches and
are particularly rich sources of beta-carotene."
"The other forms of Vitamin A, generally found in multi-vitamins, are in a solid state at room temperature and are less absorbable by the body."
"Many items on the market, such as skim milk and baby formula, use Vitamin A in the form of A Palmitate, which is water-soluble. These children [children with autism] need the lipid-soluble [fat soluble] form of Vitamin A found in liver, kidney, milk fat and cod liver oil."
"The first (pro vitamin A) is also known as carotene and can be found in yellow, orange and green vegetables and fruits and is converted to Vitamin A by the body.
In plants, Vitamin A is found mainly in the form of beta-carotene. Beta-carotene is converted to Vitamin A in a process, which ensures that Vitamin A levels do not become excessive. Therefore beta-carotene is generally considered non-toxic."
"The second type of Vitamin A is known as retinol. This is known as a pre-formed A and can be found in foods of animal origin."
"Retinol is destroyed by
"Take vitamin A with
· B group vitamins,
· vitamins C, D and E,
· essential fatty acids
· phosphorus and
for the best results."
· "Take vitamin A supplements with fatty foods, which will help with absorption. Vitamin A needs fat in order to be absorbed properly.
· Take vitamins A and E together. Vitamin E is necessary for vitamin A to be properly metabolized.
· Take zinc with vitamin A if you are using a zinc supplement. It also helps vitamin A metabolize."
"More of this vitamin is required when you
· consume alcohol,
· on a low-fat diet, or a
· diet high in polyunsaturated fatty acids,
· if you smoke or live in a polluted area.
It may also be indicated if you
· suffer from diabetes or
· have an under-active thyroid gland.
Be careful of vitamin A in pregnancy."
· "Smoking may increase your need. Vitamin A is an antioxidant and can help protect against the…damage caused by smoking.
· Avoid using mineral oil laxatives [some antacids also contain mineral oil]. They destroy vitamin A in the body.
· Use antacids only when you really need to. They inhibit vitamin A absorption.
· Check whether your prescription drugs inhibit vitamin A absorption. Some drugs do, such as colchicine, used for gout, and several cholesterol medications.
· Decrease your alcohol consumption if you are a heavy drinker. Besides its other adverse effects, alcohol will interfere with vitamin A absorption."
"Absorption of vitamin A may be impaired if you have a disorder that impairs fat absorption, such as pancreatitis, celiac disease or cystic fibrosis. Check with your doctor, because you may have a deficiency."
· "Consider using beta-carotene. Beta-carotene is what gives foods such as sweet potatoes and pumpkins their yellow-orange color. It is a precursor to vitamin A, and is not toxic even in very large doses.
· Take a beta-carotene complex rather than single carotenoids.
· Take other minerals separately, since they can block absorption of carotenoids.
· Use a micellized version of vitamin A if you are sick and in need of extra antioxidant protection. Micellized means that the vitamin has gone through a special process that has made it water soluble, so that it is now more quickly absorbed."