SEARCH RESULTS for "Vitamin A"

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.

Other Related Product Reviews Found:
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Encyclopedia Articles Found: (Articles do not mention brands)
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1.Natural & Alternative Treatments
2.Nutrition Supplements: Vitamins, Minerals, and Non-Nutrient Supplements
3.Herbal Medicine
4.Vitamin A
5.Vitamin D
6.Vitamin C
7.B Vitamins
8.Isotretinoin
9.Pre-eclampsia and Pregnancy-induced Hypertension
10.Cancer Prevention (Reducing the Risk)
... More Results


ConsumerLab.com Answers to Questions Found:
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1.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?
2.Why is beta-carotene still an ingredient in some supplements? Isn't it dangerous?
3.What is fermented cod liver oil, such as Blue Ice? Is it better than regular cod liver oil?
4.What is the difference between fish oil and cod liver oil? Is one better than the other?
5.Can supplements with antioxidants like beta-carotene and vitamins A and E cause you to die sooner?
6.Can vitamins or other supplements cause a change in the ability to taste, or even a loss of taste?
7.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?
8.How likely are Americans to be deficient in vitamins or minerals?
9.Can taking too much fish oil be dangerous?
10.I was surprised when my doctor told me to stop taking supplements because my kidney function was low. But after stopping the supplements, my kidney function returned to normal. Can taking a lot of supplements really damage the kidneys?  (in Comments)
11.Is it true that some vitamins or supplements can cause cancer?
12.Is it better to get vitamins from foods or supplements, and are natural vitamins better than synthetic vitamins?
13.Have you evaluated a multivitamin by Vita Logic called Daily Extra?
14.I've heard it's best to take fat-soluble supplements, like CoQ10, curcumin, and vitamin D, with fats or oils to increase absorption. Would taking them with a fish oil capsule be enough?
15.Do any supplements help prevent or improve cataracts?
16.I enjoy oat milk in my coffee, but how healthy is it for me?
17.Which vitamins and minerals should be taken together or separately?
18.Are there any supplements I should avoid when taking acetaminophen (Tylenol)?
19.Can prenatal vitamins have too much folic acid? Mine has 800 mcg, but isn't that more than what's recommended? Is this dangerous to me or my baby?
20.Do any supplements help prevent or treat osteoporosis?
21.Do vitamin patches, such as for B12 or multivitamins, really work? How about those from PatchMD?
22.Does taking a laxative interfere with the absorption of vitamins or minerals?
23.Are there vitamins or supplements that can reduce my risk of breast cancer? Do any increase cancer risk?
24.Is there a risk of liver toxicity with certain supplements?
25.What are phytoceramides? Do phytoceramide supplements really work to improve aging skin?
26.What is Brain Bright and can it really improve memory or cognition?
27.What is graviola? Can it really help fight cancer?


Clinical Updates Found:
2019 Vitamin A and Skin Cancer (08/06/2019)
Vitamin A and Skin Cancer
A study showed that people with higher intakes of vitamin A have a lower risk of developing squamous cell cancer of the skin. Does mean that taking a vitamin A supplement will help? Find out in the What It Does section of the Vitamin A Supplements Review, where we also discuss the risk of melanoma. (Also see our Top Picks for vitamin A supplements.)
2017 Vitamin A & Autism (12/17/2017)
Vitamin A & Autism
Giving vitamin A to young children with autism spectrum disorders and low blood levels of vitamin A (as retinol) seemed to improve some symptoms of ASD, according to a pilot study. For details, see the "What It Does" section of the Vitamin A 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.FTC Warns 50 More Companies for Coronavirus Claims (05/23/2020)
2.FTC Warns 45 More Companies for Coronavirus Claims (05/09/2020)

Archived Recalls and Warnings Found:
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1.Multivitamin Recalled Due to Allergen Risk (02/28/2017)
2.Maker of Vitamin K, Vitamin A & More Warned for Manufacturing Violations, Drug Claims (12/29/2015)
3.Maker of Children's Vitamins, Weight Loss Supplements and More Warned for Manufacturing Violations (11/11/2014)
4.Seller of Multivitamin Warned for Drug Claims (10/10/2014)
5.Maker of Joint and Weight Products Warned for Hidden Drugs, Manufacturing Violations (09/23/2014)
6.Maker of Mood, Smoking Cessation Supplements and More Warned for Violations, Drug Claims (05/14/2014)
7.Seller of Aloe, Thyroid and Other Supplements Warned for Manufacturing Violations and Drug Claims (04/16/2014)
8.Smoking Cessation and Anti-Inflammatory Supplements Contain Unapproved Ingredient (01/04/2014)
9.Immune Supplement Recalled Due To Undeclared Milk (08/27/2013)
10.Maker of Algae Products Warned For Drug Claims, Manufacturing Violations (08/01/2013)
11.Fat Loss and Muscle Enhancement Supplements Found To Contain DMAA (08/01/2013)
12.Beware of Dietary Supplements With Claims To Treat Diabetes, FDA Warns (07/25/2013)
13.Seller of Vision Supplement Warned For Drug Claims (07/05/2013)
14.Seller of Red Rice Yeast With CoQ10, Respiratory Supplement And More Warned For Manufacturing Violations and Drug Claims (06/07/2013)
15.Seller of Sexual Enhancement, Cholesterol, Resveratrol Supplements and More Warned For Drug Claims (05/23/2013)
16.Vision Supplement Company Warned For Drug Claims (04/25/2013)
17.Cardio, Energy and Sexual Enhancement Supplement Distributor Warned For Manufacturing Violations and Drug Claims (04/18/2013)
18.Maker of Liquid Supplements Warned For Manufacturing Violations and Drug Claims (03/15/2013)
19.Vitamin and Supplement Maker Warned For Labeling Errors, Manufacturing Violations (02/06/2013)
20.Consumers May Be Eligible For Cold, Allergy and Weight Loss Supplement Refunds (01/11/2013)
21.Manufacturer of Prostate, Inflammation and Cholesterol Supplements Warned For Drug Claims (11/02/2012)
22.Standard Process Recalls Three Supplements Due to Possible Salmonella Contamination (07/03/2012)
23.Dangerously High Levels of Vitamins A and D in Product Prompt FDA Warning (03/28/2011)
24.Two Vitamin C Supplements Recalled in Canada for Vitamin A Risk (10/29/2008)
25.Airborne Settles Lawsuit Over False Advertising of its "Miracle Cold Buster" (03/04/2008)
26.Some Supplements Can Damage Eyes At High Doses and with Topical Use (10/27/2004)
27.Recall Update for Certain Metabolife Bars - Excessive Vitamin A (01/31/2002)


News Releases Found:
2018 Best Vitamin A Supplements, Including Cod Liver Oils, Identified by ConsumerLab (10/26/2018)
2017 Gummies Are Most Likely to Fail Testing in Review of Multivitamins -- Best and Worst Multivitamins Identified by ConsumerLab Testing (11/01/2017)
2016 ConsumerLab.com Discovers Problems with Most Multivitamins for Dogs and Cats (07/29/2016)
 ConsumerLab.com Helps Consumers Make Sense of the FDA's Updated Daily Values (DV) for Vitamins and Minerals (07/27/2016)
 Problems Found with 32% of Multivitamin/Multimineral Supplements -- ConsumerLab.com Identifies Good Choices for Men, Women, and Children (01/12/2016)
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)
2009 ConsumerLab.com Warns of Problems with Multivitamins and Vitamin Water -- Defects Found in Over 30% of Supplements Selected for Testing; Several Popular Children's Multis Exceed Tolerable Limits (03/31/2009)
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 Find Fifty Fish Oil Supplements Pass Quality Testing -- New Report Helps Consumers Choose Among Pills, Liquids, Foods and Beverages with Omega-3 Fatty Acids (EPA and DHA) (08/05/2008)
 Tests of ten red yeast rice supplements by ConsumerLab.com reveal significant statin levels, but some pills contaminated -- Popular cholesterol-lowering supplements compared in new report (07/01/2008)
 Some iron supplements short on iron or contaminated according to ConsumerLab.com (05/05/2008)
2007 Consumers warned of problems with multivitamins — ConsumerLab.com uncovers defects in over half of products tested (01/19/2007)
2005 ConsumerLab.com reports on nutrition bars — Highlights major differences, inaccuracies, and urges consumers to "know your bar" (02/08/2005)
2004 Consumers warned of pitfalls with some multivitamins and vitamin waters — Testing by ConsumerLab.com uncovers problems with many brands (05/21/2004)
2001 Problems found with multivitamins and multiminerals by ConsumerLab.com (02/14/2001)


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