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Vitamin C Supplements Tested by

Vitamin C Supplements Review

Trying to find the best vitamin C supplement? Want to learn more about the health benefits of vitamin C and whether it can help for colds? Read more information on different forms (ascorbic acid, sodium ascorbate, calcium ascorbate, liposomal vitamin C), dosage, safety, potential side effects and more.

Other Related Product Reviews Found:
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1.Vision Supplements Review (with Lutein and Zeaxanthin)  *
2.Iron Supplements Review  *
3.Multivitamin and Multimineral Supplements Review  *
4.Vitamin E Supplements Review  *
5.Collagen Supplements Review  *
6.Joint Health Supplements Review (Glucosamine, Chondroitin, MSM and Boswellia)  *
7.Selenium Supplements Review  *
8.Greens and Whole Food Powders and Capsules  *
9.Mangosteen Juice and Supplements Review Article  *
10.Baobab Dried Fruit Pulp Review Article  *
11.Recommended Daily Intakes and Upper Limits for Vitamins and Minerals |
12.Sexual Enhancer Supplements Review (with Yohimbe, Horny Goat Weed, Arginine)  *
13.Coconut Waters Review  *
14.Astaxanthin Supplements Review  *
15.Lycopene Supplements Review  *
16.Quercetin Supplements Review  *
17.Zinc Supplements and Lozenges Review
18.Joint Health Supplements for Pets Review (Glucosamine, Chondroitin, MSM & Boswellia)  *
19.L-Arginine Supplements Review  *
20.Vitamin A Supplements Review, Including Beta-Carotene and Cod Liver Oil  *
21.Weight Loss Supplements Review (7-Keto DHEA, Forskolin and Stimulant Blend Supplements)
22.Green Tea Review: Supplements, Brewable, Matcha, and Bottled  *
23.Noni Juice Review Article  *
24.Inactive Ingredients / Excipients in Supplements  *
25.Pomegranate Juice and Supplements Review Article  *
26.Bilberry Supplements Review  *
27.Calcium Supplements Review  *
28.Aloe Liquids, Gels, and Supplements Review  *
29.Alpha Lipoic Acid Supplements Review  *
30.Ashwagandha Supplements Review  *
31.Black Currant Oil, Borage Oil, Evening Primrose Oil, Flaxseed Oil, and Hemp Oil Supplements Review: Sources of ALA and GLA (Omega-3 and -6 Fatty Acids)  *
32.Bone Broth Review  *
33.Choline Supplements Review (Including Phosphatidylcholine, CDP-Choline, and Alpha-GPC)  *
34.Coconut Oil and Medium Chain Triglycerides (MCT Oil) Review  *
35.Echinacea Supplements Review  *
36.Meal Replacement & Weight Management Powders and Shakes Review  *
37.Oat Cereals Review  *
38.Dark Chocolate, Cocoa Powder, Nibs, Extracts & Supplements Review -- Sources of Flavanols  *
39.Fish Oil and Omega-3 and -7 Supplements Review (Including Krill, Algae, Calamari, and Sea Buckthorn)  *
40.Probiotics Review (Including Kombucha and Pet Supplements)  *
41.Protein Powders, Shakes, and Drinks Review  *

Encyclopedia Articles Found: (Articles do not mention brands)
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1.Vitamin C
2.Herbal Medicine
3.Vitamin E
5.Sports and Fitness Support: Enhancing Recovery
7.Vitamin B6
9.Vitamin K
10.Rose Hips
... More Results Answers to Questions Found:
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1.Is liposomal vitamin C (sold as Lypo-Spheric) better than other forms of vitamin C?
2.Is Ester-C the best form of vitamin C?
3.Do vitamin C supplements help prevent cataracts?
4.Is it possible to take too much vitamin C?
5.Some vitamin C products claim to use fully reduced vitamin C. Is this important?
6.Can vitamin C reduce the pain of shingles?
7.Do any supplements help prevent sunburn or skin damage from sun exposure?
8.Does taking vitamin C (1,000 mg) deplete copper in the body?
9.Some websites claim that synthetic vitamin C in supplements may be a combination the active "L" form and the inactive "D" form of ascorbic acid. Is that true? Should I be concerned?
10.Can vitamin C from a supplement cause blood in the urine and painful urination?
11.Do any supplements help prevent or improve cataracts?
12.Are there negative interactions between the following supplements I take twice each day, as well as 60 mg of beta-sitosterol with dinner: Vitamin C (500 mg), CoQ10 (100 mg), grape seed extract (100 mg), fish oil (500 mg), vitamin D3/calcium/magnesium/zinc (200 IU/333 mg/113 mg/5mg)?
13.Can vitamin supplements strengthen brittle nails?
14.Do any supplements help for varicose veins or chronic venous insufficiency?  (in Comments)
15.Do any supplements help with gum disease or periodontitis?
16.Are there vitamins or supplements that can reduce my risk of breast cancer?
17.Which supplements should be taken with food?
18.Can supplements with antioxidants like beta-carotene and vitamins A and E cause you to die sooner?
19.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?
20.Can taking too much vitamin B-12 be dangerous? The label on my B-complex states it contains 50,000% of the Daily Value!  (in Comments)
21.Do any supplements help for flu?  (in Comments)
22.If I buy NAC as a loose powder in a large bag, as opposed to in tablet form, will it spoil? I've heard it can spoil or degrade into a harmful by-product.  (in Comments)
23.After developing kidney stones, I was told to avoid tea -- but recently I've heard that green tea might actually be helpful for kidney stones. Is that true?
24.Can cocoa and chocolate cause kidney stones?
25.Do arnica pills really work to prevent bruising?  (in Comments)
26.I take a number of supplements and I think they are making my acid reflux worse. Which supplements could be causing my stomach irritation, and what can I do about it?
27.Is it better to get vitamins from foods or supplements, and are natural vitamins better than synthetic vitamins?
28.Which supplements are helpful to have when traveling? Any tips on how to best store supplements on trips?
29.Do any supplements help prevent or treat a cold?
30.Do diamine oxidase (DAO) supplements for histamine intolerance really work?
31.Do any supplements help prevent or reduce eye floaters?
32.Do vitamins, minerals and nutritional supplements lose effectiveness with exposure to high temperatures and is it safe to order supplements by mail in the summer?
33.Is there cause for concern with "gummy vitamins?" There are many different gummies out there. Are some better than others?
34.Do any supplements help for restless legs syndrome?
35.Do glutathione supplements work to prevent aging or for other conditions?
36.Can beta-sitosterol cause erectile dysfunction or low libido? Are there any other side effects?
37.Do any supplements help for irritable bowel syndrome (IBS)?
38.I thought the B vitamins were all water soluble and did not build up in the body, so you would not build up toxic levels. Am I wrong?
39.Are liquid vitamins better than pills?
40.Are the "% DV" numbers on vitamin supplement labels really based on what I need?
41.Are there any supplements I should avoid when taking acetaminophen (Tylenol)?
42.Are there any supplements I should avoid when taking aspirin or ibuprofen?  (in Comments)
43.Can castor oil eye drops improve or dissolve cataracts?
44.Do any supplements help for tinnitus? Is it true that some supplements can cause tinnitus?  (in Comments)
45.Sometimes my powdered supplements get clumpy. Should I be concerned?
46.What is the best form of iron supplement?
47.Which supplements can cause diarrhea?
48.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?
49.Which supplements can help to lower blood pressure?
50.I take ubiquinol to replenish CoQ10 depleted by my statin. I also take curcumin (from turmeric). Since they both manage free radicals, do I need to take the curcumin?
51.I'm thinking of changing my multivitamin, but the one I'm considering doesn't contain molybdenum. Most others have it. How important is molybdenum?
52.I take estrogen replacement (Vagifem), to help relieve the symptoms of menopause. Are there supplements I should avoid, or be taking, due to this drug?
53.I've been taking a Daily Advantage multi but am now concerned by the very high % DV for vitamin C (833% DV), niacin (325% DV), and B vitamins (over 1,000% DV for several). The company tells me this formula is based on clinical experience and the scientific literature. What do you think?
54.What is Lipo-flavonoid and does it work for tinnitus or other ear problems?
55.Can CoQ10 or ubiquinol be ruined by heat? I recently purchased several bottles of Qunol Plus from and they arrived hot. The soft gels are not melted, but I am concerned.
56.How likely are Americans to be deficient in vitamins or minerals?
57.Do Sugar Bear Hair Vitamins make hair shine, nails stronger, and help both to grow? They taste good but are super expensive.
58.What is Protandim and does it really work?
59.Which supplements are important after bariatric surgery (i.e., weight loss or stomach-reducing surgery)? Are there any I should avoid?
60.Which vitamins and minerals should be taken together or separately?
61.Do any supplements reduce side of effects of chemotherapy?
62.Do vitamin patches, such as for B12 or multivitamins, really work? How about those from PatchMD?
63.How do the Beyond Burger, the Impossible Burger, and a beef burger compare in terms of vitamins and minerals, and which is best?
64.I do moderate exercise for about an hour a few times a week. Which supplements might help me?
65.What is EpiCor? Does it really "boost" the immune system and prevent colds?
66.What is inositol hexaphosphate (IP6)? Can it really prevent or treat cancer?
67.Which supplements can help with arthritis?
68.How much should I expect to pay for supplements? Are higher-priced supplements any better than low-priced brands?

Clinical Updates Found:
2019 Vitamin C and Kidney Damage (12/03/2019)
 Vitamin C Blunts Exercise Benefits (03/26/2019)
 Kidney Stones Due to Supplement? (02/19/2019)
 Vitamin C for Blood Sugar Control (02/12/2019)
2018 Vitamin C and Kidney Damage (12/09/2018)
 Vitamin C and Prostate Cancer (09/22/2018)
 Vitamin C for Colds? (08/03/2018)
2017 Exercise Benefit Lost With High-Dose Vitamins (04/08/2017)
2016 Is Ester-C Better? (08/03/2016)
 Vitamin C and Breast Cancer (07/23/2016)
2015 Vitamin C: The Exercise Replacement? (09/09/2015)
2014 When Vitamin C May Curb a Cold (08/06/2014)
 Vitamins C & E Blunt Exercise Effect (02/07/2014)
 Multivitamin Lowers Cataract Risk (01/19/2014)
2013 Antioxidants: Too Much of a Good Thing? (08/25/2013)
 Vitamin C: Does It Fight Colds? (06/09/2013)
2012 Vitamin C and Blood Pressure (04/30/2012)

Recalls and Warnings Found:
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1.Silver Bullet Supplement for Men Recalled (11/16/2019)
2.Libido Supplement for Men and Women Recalled (11/12/2019)
3.Green Lumber Enhancement Supplements Recalled (10/26/2019)
4.Seller of Tea, Colloidal Silver, Homeopathic Products Warned for Manufacturing Violations (10/08/2019)
5.Liquid Vitamin C for Men Recalled (09/21/2019)
6.Seller of Liposomal Curcumin, Vitamin C & Melatonin Warned for Manufacturing Violations (08/20/2019)
7.Seller of 5-HTP, Potassium & More Warned for Manufacturing Violations (12/01/2018)
8.FDA Warns Seller of Goldenseal and Parasite Supplements (08/28/2018)
9.Maker of Vitamin B12 and Multimineral Supplements Warned by FDA (07/18/2018)
10.Seller of Astaxanthin, Cinnamon, Pine Bark and More Warned for Manufacturing Violations (05/12/2018)
11.FDA Warns Seller of Echinacea, Iron, Aloe Supplements & More for Manufacturing Violations (04/17/2018)
12.Warning to D-Limonene, Vitamin C Seller (02/10/2018)
13.Flawless Beauty Shut Down, Company's Kits and Products Recalled (01/19/2018)
14.FDA Warns Seller of Acai, Garcinia & More for Drug Claims (08/01/2017)
15.FDA Warns Seller of "Quick Slim with pure Hoodia Gardonii" and "Diabalance Herbal Blood Sugar Balance" (07/18/2017)
16.Seller of Alpha Lipoic Acid, Cinnamon Supplements and More Warned For Manufacturing Violations (06/27/2017)
17.FDA Warns Seller of Menopause, Sexual Enhancement, Prostate Supplements and More For Manufacturing Violations (06/23/2017)
18.Seller of Prostate, Immune Supplements & More Warned for Manufacturing Violations (06/10/2017)
19.Seller of Herbal Supplements Warned for Manufacturing Violations, Drug Claims (06/06/2017)
20.Seller of Vitamin C, Calcium, Mushroom Supplements and More Warned for Manufacturing Violations (05/30/2017)
21.Seller of Amino Acid Supplements & More Warned for Manufacturing Violations (05/02/2017)
22.Beware of Products Which Promise to Treat or Cure Cancer, FDA Warns (04/25/2017)
23.Seller of B Vitamins, Vitamin C, Potassium & More Warned for Manufacturing Violations (04/04/2017)
24.Life Extension Warned for Drug Claims (02/14/2017)
25.Seller of B Vitamins, Omega-3s and More Warned for Manufacturing Violations, Drug Claims (09/27/2016)
26.Liquid Multis, Vitamin D & More Recalled Due to Potential Bacterial Contamination (08/09/2016)
27.Maker of Bone Health, Prostate, Cholesterol Supplements and More Warned for Drug Claims (03/29/2016)
28.Maker of Calcium and Vitamin C Supplements Warned for Manufacturing Violations (03/08/2016)
29.Seller of "NaturalDoctor" Vitamin C, Echinacea and More Warned for Manufacturing Violations (11/07/2015)
30.Seller of Vision Supplements Warned for Manufacturing Violations, Drug Claims (03/10/2015)
31.POM Wonderful Claims Were Deceptive, Court Rules (02/06/2015)
32.CVS Sued for Eye Health Supplement Claims (01/16/2015)
33.Maker of Ginseng, Zinc, Calcium and More Warned for Manufacturing Violations (12/05/2014)
34.Seller of Diabetes, Prostate Supplements and More Warned for Manufacturing Violations, Drug Claims (11/21/2014)
35.Seller of "Ebola" Supplement Warned for Drug Claims (11/21/2014)
36.Seller of Cholesterol, Arthritis Supplements and More Warned for Drug Claims (11/06/2014)
37.Seller of Prostate, Heart Supplements and More Warned for Drug Claims (11/06/2014)
38.Seller of Vitamin C, Iron and Detox Supplements Warned for Violations, Drug Claims (10/30/2014)
39.Supplements Recalled Years Ago Remain on the Market, Still Contain Hidden Drugs (10/22/2014)
40.Seller of Multivitamin Warned for Drug Claims (10/10/2014)
41.Seller of "Nerve", "Cleanse" and Probiotic Supplements Warned for Drug Claims (09/05/2014)
42.Maker of Cough and Sleep "Remedies" Warned for Drug Claims (07/11/2014)
43.Maker of Mood, Smoking Cessation Supplements and More Warned for Violations, Drug Claims (05/14/2014)
44.Seller of Aloe, Thyroid and Other Supplements Warned for Manufacturing Violations and Drug Claims (04/16/2014)
45.Seller of Aloe and Vitamin C Supplements Warned for Manufacturing Violations (03/05/2014)
46.Emergen-C Settles False Advertising Lawsuit (01/28/2014)
47.Muscle Growth Supplement Linked with Liver Failure (12/24/2013)
48.Seller of Herbal Supplements and "Tonics" Warned For Manufacturing Violations and Drug Claims (09/05/2013)
49.Maker of Sexual Enhancement Supplement Warned for Manufacturing Violations (08/28/2013)
50.Immune Supplement Recalled Due To Undeclared Milk (08/27/2013)
51.Ginkgo, Milk Thistle, Cleanse and Nopal Supplement Maker Warned For Manufacturing Violations, Drug Claims (08/16/2013)
52.Vitamin B, Vitamin C and Multimineral Supplements Recalled Due To Anabolic Steroid Risk (08/02/2013)
53.Fat Loss and Muscle Enhancement Supplements Found To Contain DMAA (08/01/2013)
54.Beware of Dietary Supplements With Claims To Treat Diabetes, FDA Warns (07/25/2013)
55.Seller of Vision Supplement Warned For Drug Claims (07/05/2013)
56.Joint Health Supplement Recalled for Undeclared Allergens (05/09/2013)
57.Seller of Immune, Cholesterol, Liver and Blood Sugar Products Warned For Drug Claims (04/26/2013)
58.Vision Supplement Company Warned For Drug Claims (04/25/2013)
59.Cardio, Energy and Sexual Enhancement Supplement Distributor Warned For Manufacturing Violations and Drug Claims (04/18/2013)
60.Glutathione Supplement Maker Warned For Manufacturing Violations and Drug Claims (04/11/2013)
61.Probiotic Recalled Due To Undeclared Soy (03/21/2013)
62.Maker of Liquid Supplements Warned For Manufacturing Violations and Drug Claims (03/15/2013)
63.FDA and FTC Warn: Supplements Cannot Prevent, Treat Or Cure Cold And Flu (02/21/2013)
64.Cold, Flu and Stress Supplement Company Warned For Adulteration, Drug Claims And More (02/20/2013)
65.Energy Drink Recalled Due To Bacterial Contamination (02/15/2013)
66.Manufacturer of Heart, Multivitamin, Cranberry, and Longevity Supplements Warned For Adulteration and Drug Claims (02/13/2013)
67.Food for Health Warned for Manufacturing Violations and Drug Claims on Supplements (01/24/2013)
68.Consumers May Be Eligible For Cold, Allergy and Weight Loss Supplement Refunds (01/11/2013)
69.Seller of Blood Sugar, Depression and Sleep Supplements Warned For Making Drug Claims (12/26/2012)
70.Maker of Vitamin C, Aloe and Sexual Enhancement Supplements Warned for Drug Claims and Misbranding (11/14/2012)
71.Maker of Joint Health, Blood Sugar, Prostate, Ginkgo Supplements and More Warned For Drug Claims, Misbranding and Adulteration (11/02/2012)
72.Maker of Eye Health Supplements Warned for Drug Claims (09/26/2012)
73.Maker of Concussion Recovery Supplement Warned For Making Drug Claims (09/10/2012)
74.Supplement Company Warned For Medical Claims and Misbranding Of Omega-3, CoQ10, Noni Juice And More (08/30/2012)
75.Standard Process Recalls Three Supplements Due to Possible Salmonella Contamination (07/03/2012)
76.Herbal Sprays for Colds and Cold Sores Recalled (02/11/2012)
77.FDA Inspection Finds Manufacturing Problems with Several Supplements Including Women's Multivitamin (07/15/2011)
78.Recall of "Raw" Vitamin C Supplement Containing Soy (03/04/2011)
79.Two Vitamin C Supplements Recalled in Canada for Vitamin A Risk (10/29/2008)
80.Recall of Pepsin-containing Digestive Supplements (01/18/2002)

News Releases Found:
2019 Best Vision Supplements Identified by ConsumerLab (10/22/2019)
 CBD and Collagen Rise in Popularity, as Probiotics and Coconut Oil Dip in Latest ConsumerLab Survey of Supplement Users (02/24/2019)
2018 Magnesium, Curcumin, and Apple Cider Vinegar Rise in Popularity, While Probiotics Dip and Calcium Continues to Decline in Latest Survey of Supplement Users (02/24/2018)
2017 Reveals Best Zinc Lozenges and Supplements for Shortening Colds and Correcting Deficiency (10/19/2017) Reveals Best and Worst Turmeric and Curcumin Supplements & Spices -- 31% Fail Tests of Quality (04/04/2017) Reveals Best and Worst Vitamin C Supplements -- 20% Fail Tests of Quality (03/15/2017)
 Vitamin D Supplements Maintain Top Spot in Popularity, as Probiotics Surpass Multivitamins to #4 Behind Fish Oil and CoQ10 in Latest Survey (02/24/2017) Reveals Best and Worst B Vitamin Supplements and Why Current Labels Often Mislead (02/23/2017)
2016 Discovers Problems with Most Multivitamins for Dogs and Cats (07/29/2016) Helps Consumers Make Sense of the FDA's Updated Daily Values (DV) for Vitamins and Minerals (07/27/2016)
 Vitamin D Supplements Jump to Top Spot in Popularity, Surpassing Fish Oil, as Probiotics Rise to #5 Spot Behind CoQ10 and Multivitamins in Survey (02/24/2016)
 Problems Found with 32% of Multivitamin/Multimineral Supplements -- Identifies Good Choices for Men, Women, and Children (01/12/2016)
2015 Use of Magnesium and Probiotics Rise, Multivitamins and Weight Loss Supplements Fall, According to Survey (02/28/2015)
2014 Which Weight Loss Supplements Are Best? Reviews the Evidence and Tests the Quality of Popular Products (07/07/2014)
 Calcium, Vitamin C, and Fish Oil Supplements Drop in Use, Probiotics Rise According to Survey (02/13/2014)
 You May Be Getting More Vitamin C Than You Think from Some Supplements, Cautions -- 27% of Vitamin C Supplements Don't Meet Label Claims in Recent Tests -- (01/29/2014)
2013 Use of CoQ10, Digestive Enzymes, Probiotics and B Vitamins on the Rise According to Survey (01/31/2013)
2012 Reveals How Much Caffeine is in Energy Drinks -- Also Finds Some Drinks and Dietary Supplements Don't Contain Claimed Amounts of B Vitamins (09/27/2012)
 Review of vitamin C supplements by finds many of high quality but a wide range in prices (03/12/2012)
 Fish oil and multivitamins most popular supplements in survey -- Internet most popular place to shop (02/05/2012)
2011 Vitamin D use increased 52% in past two years according to survey of supplement users -- Fish oil continued to surpass multivitamins as most popular supplement and Internet was most common place to buy supplements (01/31/2011)
2008 finds most vitamin C supplements pass quality tests but one short on ingredient and some exceed tolerable levels (03/07/2008)
 Consumers warned of lead in some turmeric supplements — Highest lead level ever reported by; Lack of active compound also a problem (02/06/2008) finds most potassium supplements meet quality standards, but one with only 18% of ingredient — Results for 12 potassium supplements in new review (01/08/2008)
2007 finds improvement in quality of omega-3 and -6 supplements — Results for 22 products made from evening primrose, flaxseed, borage and black currant oils (12/10/2007)
2006 Care advised with natural cold remedies: finds few products with proper quality and directions — offers advice from tests of echinacea, garlic, ginseng, vitamin C, and zinc supplements (10/10/2006) tests cancer-prevention supplements; several contaminated with lead or low in ingredient
— Report available for green tea, selenium, and lycopene supplements
2005 finds most B-vitamins of high quality but three lacking in ingredients — Test Results for 41 Products Reported Along with Information on Use (03/30/2005) reports on vitamin C supplements — Test Results for 29 Products Reported Along with Information on Use (03/14/2005) 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 uncovers problems with many brands (05/21/2004)
2003 Acidophilus" and other probiotic supplements gain in popularity but live bacteria missing in many — releases review online today (01/21/2003)
2002 Top quality melatonin products identified by — Hormone supplement used to treat sleep disturbances due to jet travel and other causes (12/30/2002)
 Pharmavite dietary supplements receive approval — Vitamin E, SAM-e, St. John's Wort, Ginkgo and others merit approved quality products ranking (07/10/2002)
2001 review of vitamin E supplements finds some insufficiencies and need for clearer labeling; test results released online today (03/13/2001)
 Problems found with multivitamins and multiminerals by (02/14/2001)
 Some supplements for arthritis may exceed newly released safe intake levels for manganese (01/29/2001)
2000 tests popular supplement for heart failure; CoQ10 test results released online today (11/21/2000) finds new calcium products of higher quality than many traditional supplements; Test results released online today (09/06/2000) finds that not all creatine supplements meet label claims; Popular sports supplement test results released online (08/07/2000)
 Pesticide contamination found in many Ginseng supplements tested by (07/11/2000) test of vitamin C products identifies quality control issues and misuse of USP claim. (05/17/2000) announces first test-based buyer's guide to dietary supplements; Manufacturers encouraged to have products tested for potential inclusion. (04/24/2000)
 Only half of SAM-e supplements found to contain proper ingredients and labeling in testing; Product Review of popular anti-depressant published online today. (03/28/2000)


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