SEARCH RESULTS for "Beta-Carotene"

Vitamin A Supplements (Including Cod Liver Oil) Reviewed by ConsumerLab.com

Vitamin A Supplements Review, Including Beta-Carotene and Cod Liver Oil

Learn what to look for when choosing the best vitamin A supplement, including beta-carotene and cod liver oil. Review test results and quality and cost comparisons for popular brands. Plus, dosage, safety, side effects, drug interactions and more. Understand what you are taking before you buy.

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Encyclopedia Articles Found: (Articles do not mention brands)
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1.Carotenoids
2.Beta-Carotene
3.Leukoplakia
4.Sunburn
5.Antioxidant
6.Tropical Oils
7.Bile Acid Sequestrant Drugs
8.Cervical Dysplasia
9.Retinitis Pigmentosa
10.Diabetes, General
... More Results


ConsumerLab.com Answers to Questions Found:
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1.Why is beta-carotene still an ingredient in some supplements? Isn't it dangerous?
2.Do any supplements help prevent sunburn or skin damage from sun exposure?
3.Can supplements with antioxidants like beta-carotene and vitamins A and E cause you to die sooner?
4.Why does my multivitamin make me nauseous? Is there anything that can help?  (in Comments)
5.I am very concerned about getting too much vitamin A. Is there danger in getting too much vitamin A if I take fish oil, which I've heard contains a lot of vitamin A, in addition to my multivitamin?
6.What is fermented cod liver oil, such as Blue Ice? Is it better than regular cod liver oil?
7.Is it true that there is no point in taking fish oil supplements for heart health?  (in Comments)
8.Which "whole food" multivitamins are only from foods and don't include synthetic vitamins? What can you tell from the labels of these products: Complete Foods Nutrition-OctoMega MultiVitamin; Sunwarrior Raw Vitamins; Garden of LIfe-MyKind Organics; Nature's Brands-PhytoVitamins; Doctors' Research MultiVitamin?
9.Have you evaluated a multivitamin by Vita Logic called Daily Extra?
10.I read that sterol supplements to lower cholesterol like CholestOff can block the absorption of vitamins. Is that true?
11.Do vitamin C supplements help prevent cataracts?
12.Which vitamins and minerals should be taken together or separately?
13.Do any supplements help prevent or treat osteoporosis?
14.Is it true that some vitamins or supplements can cause cancer?
15.Are there vitamins or supplements that can reduce my risk of breast cancer? Do any increase cancer risk?
16.Do any supplements reduce side of effects of chemotherapy?
17.Is it better to get vitamins from foods or supplements, and are natural vitamins better than synthetic vitamins?
18.What are the health benefits of tart cherry juice?
19.What are the health benefits of avocado oil? Is it healthier than olive oil? Which avocado oils are best?


Clinical Updates Found:
2019 Caution With Antioxidants (01/27/2019)
Caution With Antioxidants
A new study suggests it might be risky to take antioxidant supplements during cancer treatment. We have added this important information to our answer to the following question: Can supplements with antioxidants like beta-carotene and vitamins A and E cause you to die sooner?
 Don't Take Minerals With Certain Supplements (01/15/2019)
Don't Take Minerals With Certain Supplements
Taking minerals like calcium and magnesium can dramatically reduce the absorption of carotenoids like lycopene, beta carotene, and astaxanthin. Get the details in the Concerns and Cautions section of the Lycopene Supplements Review.
2013 Latest Supplement Recommendations (11/17/2013)
Latest Supplement Recommendations
New draft recommendations on vitamin and mineral supplement use were published this week by the U.S. Preventive Services Task Force. The recommendations apply only to healthy adults without nutritional deficiencies. They focus only on the use of supplements for the prevention of cardiovascular disease and cancer at doses not exceeding tolerable upper intake levels. The recommendations are based on existing science and are generally consistent with information already presented in ConsumerLab.com’s Product Reviews.  We have summarized the recommendations below, with links to more information in ConsumerLab.com’s reports:

- Beta-Carotene and Vitamin E:  Supplementation with either does not provide a benefit. Vitamin E does not pose a risk of harm, but beta-carotene increases the risk of lung cancer in people at risk for lung cancer.

- Other Single Vitamins, Minerals, Pairs, and Multivitamins: There is inadequate evidence regarding a benefit or a risk of harm.

The task force stressed that at excessive doses (above tolerable upper intake levels) there is evidence of harm with supplementation, such as with vitamin A and vitamin D
 Antioxidants: Too Much of a Good Thing? (08/25/2013)
Antioxidants: Too Much of a Good Thing?
A new, long-term study of Americans found the risk of dying over the course of the study (about 14 years) was lowest when antioxidant levels in the blood were above the lowest levels (the bottom 20% of the population). However, for people in the top 20% of blood levels for vitamins A and E, the risk of death increased compared to people with moderate levels. For selenium and beta-carotene, there was no significant difference in the death rate between moderate and high levels, although for vitamin C some additional benefit was seen at high, but not the highest, levels.
 
The results suggest that antioxidant supplements may be useful for those who are nutritionally deficient, but, as noted by the researchers, "beyond a certain threshold, higher levels do not lead to additional benefit, and may potentially be toxic." More details (including specific serum levels) are found in the linked updates to the following reviews, which include our test results and quality ratings of products:
 
 
  
  
2012 Lower Melanoma Risk with Vitamin A (03/18/2012)
Lower Melanoma Risk with Vitamin A
A study of people ages 50 to 76 found the risk of developing melanoma (over an average of 6 years) was 40% lower among those who took a vitamin A supplement than among those who did not. The protective effect appeared strongest and most statistically significant among women, and only occurred with vitamin A from retinol and, not beta-carotene. For details, including the dose (which matters), see the updated information in the Vitamin A Supplement ReviewMore >>


Recent Recalls and Warnings Found:
1.Warning to D-Limonene, Vitamin C Seller (02/10/2018)

Archived Recalls and Warnings Found:
Membership required for all articles. Sign in or Join now.
1.CVS Sued for Eye Health Supplement Claims (01/16/2015)
2.Seller of Multivitamin Warned for Drug Claims (10/10/2014)
3.Manufacturer of Heart, Multivitamin, Cranberry, and Longevity Supplements Warned For Adulteration and Drug Claims (02/13/2013)


News Releases Found:
2018 Best Vitamin A Supplements, Including Cod Liver Oils, Identified by ConsumerLab (10/26/2018)
2015 ConsumerLab.com Identifies Best Vitamin A Supplements, But Cautions That Most People Don't Need Them (01/20/2015)
2013 Use of CoQ10, Digestive Enzymes, Probiotics and B Vitamins on the Rise According to ConsumerLab.com Survey (01/31/2013)
2011 Not all vitamin A supplements pass ConsumerLab.com tests -- New report reviews beta-carotene and cod liver oil supplements (09/21/2011)
 ConsumerLab.com puts multivitamins to the test (06/16/2011)
2008 Tests reveal quality problems with vitamin A supplements -- New ConsumerLab.com report focuses on vitamin A, including beta-carotene and cod liver oil (10/28/2008)
 ConsumerLab.com finds melatonin supplements range in strength but ingredient quality is high (10/02/2008)
 ConsumerLab.com's tests of menopause supplements reveal wide range in strength and quality; mislabeling and contamination discovered -- Soy and red clover isoflavones, black cohosh, and progesterone products tested (09/17/2008)
 ConsumerLab.com finds improvements in labeling of nutrition bars but potential pitfalls exist -- New report compares 20 bars, including those for protein, fiber, energy and whole food (08/12/2008)


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