Product name: Source Naturals, Active A, 25,000 IU, 120 Tablets
Quantity: 120 Count, 0.05 kg, 4.3 x 4.3 x 7.6 cm
Categories: Source Naturals, Supplements, Vitamins, Vitamin A, Antioxidants, Beta Carotene
Dietary Supplement, With Beta Carotene, Vitamin A is an essential nutrient which is required for both normal and night vision, and maintaining healthy skin and mucous membranes. It is also needed by the thymus gland and the bones. Beta-carotene, or pro-vitamin A, is a potent antioxidant. It is converted to vitamin A in the body when needed to optimize vitamin A levels.
Previous research has already established that when beta-carotene is metabolized, it is broken in half by an enzyme, which produces two vitamin a molecules. This may be adequate reason for supplement use, even if it does not prevent diseases other than deficiency states. He was talking about antioxidants, molecules that accept electrons from free radicals thereby diffusing the threat. Vitamin and mineral supplements are commonly used to prevent chronic diseases. Somewhere, all of these supplements hang their hats on the antioxidant peg, said stout, but do not think that just because the nutrient is an antioxidant, it must be good. In particular, pregnant women should generally consult their doctors before taking any multivitamins: For example, either an excess or deficiency of vitamin a can cause birth defects. Oral combination treatments of vitamins c and e, partly with other photoprotective compounds, did increase the photoprotective effects dramatically compared with monotherapies. Antioxidant vitamins and cardiovascular disease: Dr jekyll or mr hyde?
Source Naturals, Active A, 25,000 IU, 120 Tablets: Beta Carotene, Antioxidants, Vitamin A, Vitamins, Supplements
In it, 18,000 people who were at an increased risk of lung cancer because of asbestos exposure or smoking received a combination of vitamin a and beta carotene, or a placebo. They conducted over 100 comparisons of zinc vs no zinc and antioxidants vs no antioxidants. Plasma antioxidant vitamins and carotenoids and age-related cataract. The alpha-tocopherol, beta carotene cancer prevention study group. Using the same phs-ii study researchers concluded that taking a daily multivitamin did not have any effect in reducing heart attacks and other major cardiovascular events, mi, stroke, and cvd mortality. The hypothesis that antioxidant micronutrients may protect against the disease is a reasonable one. The multivitamin supplement contained beta-carotene (15 Mg), vitamin c (250 Mg), vitamin e (400 Iu), zinc (80 Mg) and copper (2 Mg). ‘the findings of our review show that if anything, people in trial groups given the antioxidants beta-carotene, vitamin a, and vitamin e showed increased rates of mortality. Antioxidant supplements used alone reduced the risk by about 17 percent.
We stratified results by supplement and synthesized the results of included studies by examining estimates of effects. However, the role of vitamin supplementation in prevention or reversal of many chronic diseases is less well established. Experts recommend that this synergetic interplay of several antioxidants should be taken into consideration in future research on cutaneous photoprotection. A randomized, placebo-controlled, clinical trial of high-dose supplementation with vitamins c and e and beta carotene for age-related cataract and vision loss: Areds report no. As an integrative oncologist, i recommend a diet full of dietary antioxidants that are naturally produced, not isolated high-dose antioxidant supplements. Vitamin e did not influence mortality among men who had vitamin c intake below the median. Vitamins a, c, and e are antioxidants found in plentiful form in many fruits – especially berries – and veggies, and they have been touted for their alleged ability to protect against cancer. But the issue is a little more complicated when it comes to taking antioxidant supplements. People with amd, or early signs of the disease, may experience some benefit from taking supplements as used in the areds trial.
Taking antioxidant supplements in large doses is not recommended for many reasons. Indeed, antioxidants found as supplements on store shelves are also found naturally in the body and in many types of foods. A total of 525 people have been randomised into other trials, which have evaluated a range of supplements both broad spectrum (Ocuguard, 14 ocupower, 15 and visaline, 16) and single component (Zinc 17, 18 and lutein 15). Seven previous studies had already shown that vitamins increased the risk of cancer and heart disease and shortened lives. To systematically evaluate evidences from randomized controlled trials on the effectiveness of antioxidant supplements in preventing the development and slowing the progression of age related cataract. Several decades of dietary research findings suggested that consuming greater amounts of antioxidant-rich foods might help to protect against diseases. Plus, people in the study who took the b3 supplements were more likely than those taking a placebo to develop infections, liver problems, and internal bleeding.
In such situations, special vitamin or mineral forms with much higher potencies are available, either as individual components or as specialized formulations. Future studies of multivitamin supplements should recruit from a general population with representation of multiple minority groups and both sexes, use a multivitamin that is reasonably similar to the popular brands in the current market, continue for at least a decade, and include enough participants to provide adequate power to detect benefits and harms within important subgroups, including men and women. Another trial reported excess of haemorrhagic strokes in the vitamin e group (39 Versus 23 events, hazard ratio 1,74, 95% ci 1,04 to 2,91, low-certainty evidence). Stability of the vitamin c molecule depends on aggregate condition and formulation. They might be also combined with calcium, iron, or vitamins a, b1, b2, b3, c or d. ‘these vitamins are essential for health and many people in the uk do not have an adequate intake. Two years later the same journal published another study on vitamin supplements. However, there is debate as to whether consuming large amounts of antioxidants in supplement form actually benefits health. Dr lister says problems arise when the antioxidant/free radical see-saw gets out of balance. Eye supplements can help fill in nutritional gaps in a less-than-perfect diet.
Source Naturals Vitamin A Beta Carotene
Randomized placebo-controlled trials, which can provide the strongest evidence, offer little support that taking vitamin c, vitamin e, beta-carotene, or other single antioxidants provides substantial protection against heart disease, cancer, or other chronic conditions. In these studies, volunteers were randomly assigned to take either an antioxidant or a placebo (An identical-looking product that did not contain the antioxidant). G, acute and chronic effects of supplementation), the last measurement (Chronic effect) was used in the meta-analysis. The evidence for using vitamin supplementation to prevent chronic disease is reviewed here. However, there was no significant detrimental effect caused by vitamin c. Of 286 people randomised into trials of zinc sulphate supplementation compared to placebo, 5/146 zinc-treated people withdrew due to gastrointestinal symptoms compared to 2/140 controls. In a meta-analysis in more than 11,000 people, taking vitamin c supplements was shown to decrease the duration of colds by 8% while also decreasing it’s severity. We considered the following: Vitamin c, vitamin e, carotenoids, selenium, and zinc. If you are pregnant or breastfeeding, take beta-carotene supplements only if your doctor tells you to. The areds study indicated that the beneficial effect of zinc supplementation was of a similar order to that of vitamin supplementation. Vitamin c, e, beta-carotene, lutein, zeaxanthin, and zinc are examples of antioxidant vitamins commonly found in vitamin supplements.
Multivitamins are typically available in a variety of formulas based on age and sex, or (As in prenatal vitamins) based on more specific nutritional needs; a multivitamin for men might include less iron, while a multivitamin for seniors might include extra vitamin d. Women in the whi control group, for example, had twice the average calcium intake of that anticipated when the trial was designed, and the vitamin d dose was lower than many now think is necessary to achieve optimal blood levels. The other two trials of zinc supplementation are as yet unpublished, although limited results from holz et al 19 were published in abstract form and are included here. There is also some evidence that when smokers and people who are exposed to asbestos take beta-carotene supplements, their risk of lung cancer goes up. Also, in the same high-risk group that included participants with intermediate amd, or advanced amd in one eye but not the other, the daily multivitamin reduced the risk of vision loss caused by advanced amd by about 19 percent. Last, our primary method for summarizing the effect size attributable to antioxidant vitamin supplementation across studies was the smd. The main clinical diversity was with respect to the type of supplement. Our aim was to conduct a review to better investigate whether vitamin supplements given orally modify breast cancer risk.
The most reputable companies typically will formulate their supplements without unnecessary fillers. D, chief of preventive medicine at brigham and women’s hospital in boston and a member of the institute’s committee on vitamin d. Pamela mason, of the industry-backed health supplements information service, said: antioxidant vitamins, like any other vitamins, were never intended for the prevention of chronic disease and mortality. The authors were careful to point out that these trials only evaluated antioxidant supplementation, not dietary intake of anti-oxidants from fruits and vegetables. It’s policy is to suggest supplements for micronutrients, phytonutrients, and botanicals as an individualized regimen based on tumor type, biochemistry, and treatment stage. The truth: While many people have reported better eyesight from taking turmeric supplements or from having a diet high in turmeric, the effects of the nutrient on eye health has not been studied in humans, said stout. If you do need them, take multivitamin supplements at the recommended dietary intake, instead of taking single vitamin supplements and in high doses. And when people take large doses of antioxidants in the form of supplemental vitamins, the balance between free radical production and destruction might tip too much in one direction, causing an unnatural state where the immune system is less able to kill harmful invaders. Conclusions: Supplementation with antioxidant vitamins has a small, protective effect on arterial stiffness.
A yellow pigment found in the eye, called lutein, is one supplement now being studied by the areds2 trial, a followup to the first areds trial on antioxidant supplements., It seems justified to discourage the general population from taking supplements until we have better knowledge of the restricted groups of people who might benefit. Department of agriculture web page on antioxidants and phytonutrients. Modification of the effect of vitamin e supplementation on the mortality of male smokers by age and dietary vitamin c. It is thought that bilberry is an antioxidant that can help improve night vision, and prevent macular degeneration. Specific dietary patterns, such as the mediterranean diet or nutrients with anti-inflammatory and/or antioxidant properties, may have beneficial effects on vascular function. Epidemiological prospective studies show that higher intakes of antioxidant-rich fruits, vegetables, and legumes are associated with a lower risk of chronic oxidative stress-related diseases like cardiovascular diseases, cancer, and deaths from all causes. Examples of antioxidants include vitamins c and e, selenium, and carotenoids, such as beta-carotene, lycopene, lutein, and zeaxanthin. They measured the fev1 of 535 participants and measured their beta carotene blood levels.