Mike Adams, the Health Ranger
See article keywords and concepts |
 Foods high in vitamin a include liver, chili peppers, dandelion, carrots, apricots, collard greens, kale, sweet potatoes, spinach, and cantaloupe.
It's best to consume vitamin a from natural food sources rather than supplementing it, as vitamin a can be harmful if taken in excessive amounts in supplement form (vitamin A is a fat-soluble vitamin). You may also wish to consider taking beta carotene, which is a precursor to vitamin a and has none of the overdose concerns of vitamin a.
Avoid toxic skin care products
Proper nutrition is vital for the maintenance of youthful, smooth, healthy skin. |
Ann N. Martin
See book keywords and concepts |
 Vitamin A in the form of retinol is the most active or usable form of vitamin a and is a fat soluble vitamin that stores up in your body. This form of vitamin a is derived from animal sources such as in fish liver oils, butter, cheese, egg yolks, liver, and whole milk.
Vitamin A, both beta-carotene and retinol, maintains healthy coat and skin, promotes bone growth, protects against infection, and aids in the treatment of eye disorders. vitamin a deficiencies result in night blindness, susceptibility to infections, dryness and itching, and poor growrh and development. |
Mike Adams, the Health Ranger
See article keywords and concepts |
| It's best to consume vitamin a from natural food sources rather than supplementing it, as vitamin a can be harmful if taken in excessive amounts in supplement form (vitamin A is a fat-soluble vitamin). You may also wish to consider taking beta carotene, which is a precursor to vitamin a and has none of the overdose concerns of vitamin a.
Avoid toxic skin care products
Proper nutrition is vital for the maintenance of youthful, smooth, healthy skin. |
Mehmet C. Oz., M.D. and Michael F. Roizen, M.D.
See book keywords and concepts |
 The others: excessive alcohol, cigarettes, and vitamin a. Having more than 2,500 milligrams of vitamin a in supplements a day could hurt bone formation. You need some vitamin a, but there is such a thing as having too much. (Disregard this advice if you're pregnant or you will be pregnant; your fetus needs even more vitamin a than she gets from you in order to develop her brain.) You can't OD on food sources (carrots, red peppers, sweet potatoes), but make sure your vitamins and supplements don't put you over the limit.
YOU Tip: See the Whole Picture. |
Ann N. Martin
See book keywords and concepts |
| Vitamin A in the form of beta-carotene is primarily in leafy green and yellow vegetables, carrots, dandelion greens (which contain five times the amount of vitamin a as carrots), sweet potatoes, broccoli, kale, and fruit. Excess amounts of beta-carotene can be toxic to humans and animals, however, since it is not fat soluble, it does not store in your body. vitamin a in the form of retinol is the most active or usable form of vitamin a and is a fat soluble vitamin that stores up in your body. |
Dr. Michael Heinrich, Joanne Barnes, Simon Gibbons and Elizabeth M. Williamson
See book keywords and concepts |
 The tetraterpenes are precursors of vitamin a, (retinol). a deficiency of which results in a reduction in sight efficiency through changes to the cornea and conjunctiva. vitamin a, occurs naturally in fish liver oils, carrots, green and yellow vegetables and dairy products. It is biosynthesized by the oxidative cleavage of p-carotene to retinal, which is then reduced to retinol (vitamin A,) (Fig. 6.48).
Vitamin A preparations are also used to treat nappy rash, skin irritations and minor burns; vitamin a acid (retinoic acid) and vitamin a palmitate are used as treatments for acne. |
Ann N. Martin
See book keywords and concepts |
| Excess amounts of beta-carotene can be toxic to humans and animals, however, since it is not fat soluble, it does not store in your body. vitamin a in the form of retinol is the most active or usable form of vitamin a and is a fat soluble vitamin that stores up in your body. This form of vitamin a is derived from animal sources such as in fish liver oils, butter, cheese, egg yolks, liver, and whole milk.
Vitamin A, both beta-carotene and retinol, maintains healthy coat and skin, promotes bone growth, protects against infection, and aids in the treatment of eye disorders. |
Andreas Moritz
See book keywords and concepts |
 The small intestine can only absorb vitamin a and carotene sufficiently if fat absorption is normal. If vitamin a absorption is insufficient, the epithelial cells become damaged. These cells form an essential part of all the organs, blood vessels, lymph vessels, and so on in the body. vitamin a is also necessary to maintain healthy eyes and protect against or reduce microbial infection. Vitamin D is essential for calcification of bones and teeth.5 It is of great importance to realize that supplementing these vitamins does not resolve the problem of deficiency. |
Antoinette Saville and Antony J. Haynes
See book keywords and concepts |
 Zinc and/or vitamin a Deficiency
Zinc is vital for all growth and healing in the body, and vitamin a is needed for all epithelial growth and repair. These two nutrients are commonly low in the UK diet. Given that vitamin a is fat-soluble, and that most of us eat fewer fatty foods (e.g. liver, full-fat milk) than our forebears did, we may have lower levels of this vitamin than in previous generations. To make things worse, zinc is required to release vitamin a from your liver - so if you're not getting enough of both, you could be compromising your intestinal health. |
Ann N. Martin
See book keywords and concepts |
| This form of vitamin a is derived from animal sources such as in fish liver oils, butter, cheese, egg yolks, liver, and whole milk.
Vitamin A, both beta-carotene and retinol, maintains healthy coat and skin, promotes bone growth, protects against infection, and aids in the treatment of eye disorders. vitamin a deficiencies result in night blindness, susceptibility to infections, dryness and itching, and poor growrh and development.
Vitamin B-l (Thiamine)The B vitamins are water-soluble but, as with all vitamins and minerals, do not go overboard. |
Andreas Moritz
See book keywords and concepts |
| The small intestine can only absorb vitamin a and carotene sufficiently if fat absorption is normal. If vitamin a absorption is insufficient, the epithelial cells become damaged. These cells form an essential part of all the organs, blood vessels, lymph vessels, and so on in the body. vitamin a is also necessary to maintain healthy eyes and protect against or reduce microbial infection. Vitamin D is essential for calcification of bones and teeth.5 It is of great importance to realize that supplementing these vitamins does not resolve the problem of deficiency. |
Mike Adams, the Health Ranger
See article keywords and concepts |
 And that vitamin was finally identified by taking cod liver oil and boiling it, because once you boil cod liver oil, the vitamin a in it gets destroyed. Originally they thought it was vitamin a that was responsible for bone health, but when they boiled it and destroyed the vitamin a, the anti-ricketic activity, that is the bone health activity, was still present in the cod liver oil. And so it was named vitamin D, because there had already been identified a vitamin a, a B and a C, so the next in line was vitamin D.
Adams: So this was many decades ago then?
Dr. |
Antoinette Saville and Antony J. Haynes
See book keywords and concepts |
| Zinc and/or vitamin a Deficiency
Zinc is vital for all growth and healing in the body, and vitamin a is needed for all epithelial growth and repair. These two nutrients are commonly low in the UK diet. Given that vitamin a is fat-soluble, and that most of us eat fewer fatty foods (e.g. liver, full-fat milk) than our forebears did, we may have lower levels of this vitamin than in previous generations. To make things worse, zinc is required to release vitamin a from your liver - so if you're not getting enough of both, you could be compromising your intestinal health. |
Dr. Michael Heinrich, Joanne Barnes, Simon Gibbons and Elizabeth M. Williamson
See book keywords and concepts |
| Vitamin A, occurs naturally in fish liver oils, carrots, green and yellow vegetables and dairy products. It is biosynthesized by the oxidative cleavage of p-carotene to retinal, which is then reduced to retinol (vitamin A,) (Fig. 6.48).
Vitamin A preparations are also used to treat nappy rash, skin irritations and minor burns; vitamin a acid (retinoic acid) and vitamin a palmitate are used as treatments for acne.
THE GLYCOSIDES
The glycosides are discussed in a separate section here as they in fact enhance the structural diversity of other natural product classes. |
Mike Adams, the Health Ranger
See article keywords and concepts |
 Isn't that dangerous to be eating too much of vitamin a?
There is such a thing as vitamin a toxicity. That's because vitamin a is a fat soluble vitamin, and there have been studies showing the levels of toxicity associated with consuming this. But I think it's very difficult to reach a toxic level of consumption with vitamin a, unless you're taking it as an isolated vitamin. |
| If you go out to the store and buy a vitamin a in capsules or gel caps and start chowing down on that, then sure, you could potentially get an overdose of vitamin a, and before long you're going to start showing toxicity symptoms. But getting vitamin a in a natural form with a natural complementary base of nutrients, like you get in spirulina, is very different. I don't believe there's a very high risk at all of vitamin a toxicity, even if you're chowing down on very large doses of spirulina on a regular basis. |
Mehmet C. Oz., M.D. and Michael F. Roizen, M.D.
See book keywords and concepts |
| Having more than 2,500 milligrams of vitamin a in supplements a day could hurt bone formation. You need some vitamin a, but there is such a thing as having too much. (Disregard this advice if you're pregnant or you will be pregnant; your fetus needs even more vitamin a than she gets from you in order to develop her brain.) You can't OD on food sources (carrots, red peppers, sweet potatoes), but make sure your vitamins and supplements don't put you over the limit.
YOU Tip: See the Whole Picture. |
Mike Adams, the Health Ranger
See article keywords and concepts |
 Then we have a few other factors like vitamin a in there, not beta-carotene -- diabetics do not convert beta-carotene into vitamin a very well. As you know, diabetic blindness, cataracts, and retinopathies happen all the time. These are major problems, and vitamin a is another factor that helps prevent them.
We have grape seed extract in there. The reason is that grape seed extract is one of the best collagen cross-linkers known. You get weakened blood vessels when you get glycation of the proteins because you have high blood sugar all the time. |
Mike Adams, the Health Ranger
See article keywords and concepts |
| That's because vitamin a is a fat soluble vitamin, and there have been studies showing the levels of toxicity associated with consuming this. But I think it's very difficult to reach a toxic level of consumption with vitamin a, unless you're taking it as an isolated vitamin. If you go out to the store and buy a vitamin a in capsules or gel caps and start chowing down on that, then sure, you could potentially get an overdose of vitamin a, and before long you're going to start showing toxicity symptoms. |
James Braly M.D. and Ron Hoggan M.A.
See book keywords and concepts |
 Vitamin A Supplementation
Vitamin A deficiency is commonly associated with recurring infections, especially in children. vitamin a deficiency is also the leading cause of blindness in children worldwide. The ability to safely take vaccinations also appears to be closely linked to vitamin a status. Deficiency of zinc and this vitamin may also play a key role in food allergies.
Although vitamin a deficiency is often a problem in gluten sensitivity, it is not safe to oversupplement. Excess vitamin a has been observed to cause headaches and dry skin. |
Mike Adams, the Health Ranger
See article keywords and concepts |
| Then we have a few other factors like vitamin a in there, not beta-carotene -- diabetics do not convert beta-carotene into vitamin a very well. As you know, diabetic blindness, cataracts, and retinopathies happen all the time. These are major problems, and vitamin a is another factor that helps prevent them.
We have grape seed extract in there. The reason is that grape seed extract is one of the best collagen cross-linkers known. You get weakened blood vessels when you get glycation of the proteins because you have high blood sugar all the time. |
Gary Null and Amy McDonald
See book keywords and concepts |
 Elevated bilirubin levels seen in alcoholics may indicate low vitamin a levels. Caution in levels of vitamin a therapy in these cases is advised, and consideration should instead be given to beta-carotene supplementation.
Aggression_
Improved Mood and Behavior During Treatment Wth a Mineral-Vitamin Supplement: An Open-Label Case Series of Children. Kaplan BJ; Fisher JE; et al. Journal of Child and Adolescent Psychopharmacology, 2004 Spring, 14(1):115-122.
A nutrient supplement was found to be effective in children with aggression, depression and mood swings. |
Mike Adams, the Health Ranger
See article keywords and concepts |
 The reporting on this particular study, for example, confuses absolute risk with relative risk. vitamin a, according to the reports on this study, increased mortality risk by 16 percent. But that is a relative risk number, meaning that if 1 person out of 100 normally died, then 1.16 people out of 100 would die when taking these synthetic vitamin a supplements. In other words, it might not even be one additional person out of 100, or even out of 1000. |
John Croft
See book keywords and concepts |
 Some fish oils contain toxic levels of vitamin a in particular and have to be diluted for human consumption. Some of the surface-dwelling sharks have liver oils that contain high levels of vitamin a. However, deep sea shark liver oil does not contain large amounts of either vitamin a or D and is quite safe to consume. In this respect, it is important to note that other components of the diet, such as carrots and green leaf vegetables, are also a source of vitamin a, and sunshine or fortified milk can provide vitamin D. |
Mehmet C. Oz., M.D. and Michael F. Roizen, M.D.
See book keywords and concepts |
| You need some vitamin a, but there is such a thing as having too much. (Disregard this advice if you're pregnant or you will be pregnant; your fetus needs even more vitamin a than she gets from you in order to develop her brain.) You can't OD on food sources (carrots, red peppers, sweet potatoes), but make sure your vitamins and supplements don't put you over the limit.
YOU Tip: See the Whole Picture. Around the time of menopause, your doc will suggest that you have a DEXA scan-the preferred standard for screening for osteoporosis and determining bone density. We believe in it too. |
Mike Adams, the Health Ranger
See article keywords and concepts |
| You may also wish to consider taking beta carotene, which is a precursor to vitamin a and has none of the overdose concerns of vitamin a.
Avoid toxic skin care products
Proper nutrition is vital for the maintenance of youthful, smooth, healthy skin. Though lotions, washes, and creams can sometimes help treat certain skin ailments, most skin problems stem from an internal nutritional deficiency easily remedied by altering the diet to include specific nutrients. Before you spend a fortune on expensive skin care products, try addressing the problem from the inside out. |
John Croft
See book keywords and concepts |
| Some of the surface-dwelling sharks have liver oils that contain high levels of vitamin a. However, deep sea shark liver oil does not contain large amounts of either vitamin a or D and is quite safe to consume. In this respect, it is important to note that other components of the diet, such as carrots and green leaf vegetables, are also a source of vitamin a, and sunshine or fortified milk can provide vitamin D.
The recommended daily allowance for vitamin a is 1000 retinol equivalents per day and for vitamin D is 400 International Units (IU). |
Mike Adams, the Health Ranger
See article keywords and concepts |
 Phytonutrients may: serve as antioxidants enhance immune response enhance cell-to-cell communication alter estrogen metabolism convert to vitamin a (beta-carotene is metabolized to vitamin a) cause cancer cells to die (apoptosis) repair DNA damage caused by smoking and other toxic exposures detoxify carcinogens through the activation of the cytocrome P450 and Phase II enzyme systems
4. What is the evidence that fruit and vegetable consumption protects human health? |
Email this page to a friend
