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January

Caution With Ashwagandha

1/02/2021
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Ashwagandha may decrease the effectiveness of immunosuppressant drugs and, according to a recent case report, may trigger transplant rejection. Get the details in the Concerns and Cautions section of the Ashwagandha Supplements Review. The section includes information about other potential side effects of ashwagandha.

Coffee and Heart Disease

1/05/2021
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Research published this week suggests a link between a moderate coffee consumption and reduced risk of cardiovascular disease and death. Get the details in our article about Coffee and Heart Health.

Vitamin D and COVID-19

1/09/2021
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Many preliminary studies have linked adequate vitamin D levels with reduced risk of COVID-19 or less severe disease. However, a recent study did not find a benefit among people who had been supplementing with amounts generally above the recommended daily intake requirement for vitamin D. See the details in the COVID-19 section of our Vitamin D Supplements Review. Also, see our Top Picks for vitamin D.

Magnesium, Niacin and Blood Pressure

1/09/2021
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Two studies this week showed the risk of high blood pressure to be lowest among people with adequate, but not excessive, dietary intakes of magnesium and niacin.

Also, see which foods are good sources of magnesium and, separately, good sources of niacin.

Vitamin D & Risk of COVID Death

1/12/2021
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A recent study in the U.S. found that people hospitalized with COVID had much lower rates of death with certain blood levels of vitamin D. Get the details in the COVID-19 section of our Vitamin D Supplements Review. Also, see our Top Picks for vitamin D.

High-Dose Vitamin C for COVID-19?

1/12/2021
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Does high-dose vitamin C help in people with severe COVID-19? See what a new study showed in the COVID-19 section of our Vitamin C Supplements Review.

Nicotinamide Riboside to Slow Aging and Reverse NAD+ Decline?

1/12/2021
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Nicotinamide riboside, a form of niacin, has been promoted to slow aging, partially based on the belief that it raises NAD+ levels that fall with age. A new study raises doubts about this. Get the details in the Niacin section of our B Vitamin Supplement Review. Also, learn about a concern with taking too much nicotinamide riboside.

Vitamin D for Colds and Flu?

1/14/2021
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Does monthly high-dose vitamin D help prevent colds and flu or lessen symptoms in older people? Find out what a recent study showed in the What It Does section of our Vitamin D Supplement Review. Also, see our Top Pick for vitamin D.

Vitamin K & Risk of COVID Death

1/14/2021
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A marker of low vitamin K levels has been linked to a higher risk of death in people with COVID-19, according to a new study. Get the details in the COVID-19 section of our Vitamin K Supplements Review.

Coffee and Prostate Cancer Risk

1/15/2021
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Is drinking coffee associated with prostate cancer risk? Find out what a recent study suggests in our updated answer to the question: Does drinking coffee increase or decrease the risk of cancer? Can it slow cancer progression?

Avocado Oil Quality Problems Confirmed

1/19/2021
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Recent tests confirmed the finding that many avocado oils in the U.S. market contain other, cheaper oils, as reported last year. See the details, by brand, and expert tips for consumers in our answer to the question: What are the health benefits of avocado oil? Is it healthier than olive oil? Which avocado oils are best?

Vitamin D and Prediabetes

1/19/2021
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Can vitamin D supplementation improve insulin resistance in people with prediabetes? See what a recent study found in the Prediabetes section of our Vitamin D Supplements Review. Also, see our Top Picks for vitamin D.

Aspirin and Colorectal Cancer Risk

1/23/2021
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Regular use of aspirin may reduce or increase the risk of colorectal cancer depending on when it is initiated, according to observational studies and clinical trials. Get the details in our updated answer to the question: Which supplements help reduce the risk of colorectal cancer?

Strawberries for Memory?

1/23/2021
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Can daily consumption of two cups of strawberries improve memory and cognition in older men and women? See what a new study found in our answer to the question: Do any supplements really help with brain function, like memory and cognition?

Curcumin for Reducing Muscle Soreness?

1/26/2021
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Can taking curcumin (from turmeric) reduce muscle soreness related to exercise – and does it enhance muscle strengthening from exercise? See what a new study found in the Muscle Soreness and Recovery section of the Turmeric and Curcumin Supplements & Spices Review. Also see our Top Picks for turmeric/curcumin.

Ubiquinol (CoQ10) for Cognitive Function?

1/30/2021
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Does taking ubiquinol, the active form of CoQ10, improve cognition in people with mild cognitive impairment? See what a new study found in the What It Does section of our CoQ10 and Ubiquinol Supplements Review. Also see our Top Picks for CoQ10 and ubiquinol.

B12 for Diabetic Neuropathy?

1/30/2021
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Can high-dose vitamin B12 improve nerve function and reduce pain in people with neuropathy due to type 2 diabetes? See what a new study found in the B12 section of the B Vitamin Supplements Review. Also see our Top Picks for vitamin B12.

February

Vitamin C for Bleeding Gums?

2/02/2021
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Does vitamin C supplementation reduce the tendency for gums to bleed? Find out what research shows in the What It Does section of our Vitamin C Supplements Review. Also see our Top Picks for vitamin C.

Thiamin Deficiency from Bowel Disease

2/02/2021
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People with inflammatory bowel disease (such as Crohn’s or colitis) can develop thiamin (vitamin B-1) deficiency, which can lead to life-threatening brain injury, as noted in a recent review of 31 cases. Learn more about this and other causes of thiamin deficiency in the Thiamin section of our B Vitamin Supplements Review.

Garlic-Induced Burns

2/02/2021
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Be aware that garlic applied to the skin may cause severe burns, and dozens of cases have been reported. Find out which form of garlic and type of skin application is particularly dangerous in the Concerns and Cautions section of our Garlic Supplements Review.

Saffron for Mood?

2/06/2021
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Does saffron extract improve mood in people feeling down and anxious or stressed? See what a new study found in our article about Supplements for Depression and Anxiety.

Energy Drinks and Blood Pressure

2/09/2021
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Which people are more likely to have cardiovascular side effects from energy drinks? Find out what a new study showed in the Energy Drinks & Shots section of our B Vitamins Supplements Review.

Which Form of Fish Oil Is Best Absorbed

2/12/2021
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The amount of omega-3 fatty acids (EPA and DHA) that you absorb when taking fish oil depends on the form of oil and/or when you take it. A new study suggests that a certain form is better absorbed than others. Get the facts in the Forms of Fish Oil section of our Fish Oil Supplements Review. Also see our Top Picks for fish oil.

Vitamin D for Fibromyalgia?

2/12/2021
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Does vitamin D supplementation help women with fibromyalgia? See what a new study found in the What It Does section of the Vitamin D Supplements Review. Also see our Top Picks for vitamin D.

Plant-Based Milk Caution

2/12/2021
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There may be negative effects for bones when switching to certain types of plant-based milks, according to a recent study. See the details in the Concerns and Cautions section of our Plant-Based Milks Review. Be sure to see our Top Picks among plant-based milks.

Coffee And Cholesterol

2/20/2021
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Large daily intake of coffee was linked to higher cholesterol levels in a recent study. At the same time, moderate intake of coffee may reduce cardiovascular disease risk.

Folic Acid for Cognitive Function?

2/27/2021
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Does folic acid supplementation help with cognitive function in older people? Find out what a new study showed in the Memory and Cognition section of our B Vitamin Supplements Review. Also, see our Top Picks for folic acid.

March

Diabetes Risk With Selenium

3/02/2021
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High intake of selenium from the diet or supplements has been associated with increased risk of type 2 diabetes. Get the details in the Concerns and Cautions section of our Selenium Supplements Review.

Probiotics for Ulcers?

3/02/2021
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Can probiotics help treat a common cause of stomach ulcers – H. pylori infection? Find out what new guidelines say in the What It Does section of our Probiotic Supplements Review.

For information about other supplements for peptic ulcers (and those to avoid) see our answer to the question: Do supplements help treat peptic ulcer disease? Should any be avoided?

Vitamin D for COPD and Asthma?

3/02/2021
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Does high-dose vitamin D help treat COPD or asthma? See what a new study found in the What It Does section of our Vitamin D Supplements Review. Also, see our Top Picks for vitamin D.

CBD Product Causes Positive Drug Test

3/03/2021
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A moderately high dose of a full-spectrum CBD product caused positive drug tests in 50% of people in a recent study. See the details in the Concerns and Cautions section of our CBD & Hemp Extract Supplements, Lotions, and Balms Review.

Melatonin After Stroke?

3/05/2021
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Melatonin supplementation may reduce the risk of developing delirium after a stroke, according to a new study. Get the details in the What It Does section of our Melatonin Supplements Review. Also see our Top Picks among melatonin supplements.

Ashwagandha for Exercise Endurance?

3/05/2021
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Can ashwagandha improve endurance and decrease fatigue during exercise? See what a new study found in the What It Does section of the Ashwagandha Supplements Review. Also see our Top Pick among ashwagandha supplements.

More Fish, Less Death for Some

3/09/2021
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A recent analysis found that regular consumption of fish was associated with an 18% lower risk of death over a 9-year period. Get the details in the What It Does section of our Canned Fish Review. Also see our Top Picks among canned and packaged tuna, salmon and sardines.

Coconut Oil for Lowering Blood Pressure?

3/09/2021
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Can coconut oil lower blood pressure in people with mild hypertension? See what a new study found in the What It Does section of our Coconut Oil and MCT Oil Review. Also see our Top Picks among coconut and MCT oils.

Almonds for Wrinkles?

3/09/2021
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Can eating almonds reduce facial wrinkles in postmenopausal women? See what a new study found.

Fibromyalgia Supplement?

3/13/2021
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Pycnogenol (French pine bark extract) was recently reported to reduce muscle pain and fatigue in people with fibromyalgia, but how strong is the evidence?

Does Coffee Consumption Lower Cardiovascular Risk, or Is It the Other Way Around?

3/16/2021
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New study results may undermine the association between moderate coffee consumption and reduced risk of cardiovascular disease. Find out in our updated answer to the question: Is drinking coffee good or bad for heart health?

Melatonin and Cancer

3/18/2021
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Can high-dose melatonin increase survival time or improve symptoms in people with advanced lung cancer? See what a new study found in the What It Does section of our Melatonin Supplements Review.

Also see results of a study in which melatonin was given during breast cancer treatment.

See our Top Picks among melatonin supplements.

How Much Sun to Boost Vitamin D?

3/22/2021
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Find out how much sun exposure was needed in a recent study to significantly increase vitamin D levels in older people in the Getting Vitamin D from Sunlight section of our Vitamin D Supplements Review. Also see our Top Picks among vitamin D supplements.

Folic Acid and Colorectal Cancer

3/22/2021
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Do higher intakes of folic acid and other sources of folate increase or decrease the risk of colorectal cancer? It may depend on time, according to a new study discussed in the Folate section of our B Vitamin Supplements Review. Also see our Top Picks among B vitamin supplements.

MCT Oil for Mild Cognitive Impairment?

3/22/2021
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Can medium chain triglycerides (MCTs – from coconut oil) boost brain energy and improve thinking in people with mild cognitive impairment? Find out what a recent study found in the What It Does section of our Coconut and MCT Oils Review. Also see our Top Picks among coconut and MCT oils.

Birth Control and Vitamin D

3/22/2021
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Can taking birth control pills affect vitamin D levels? Find out what a recent study found in the Concerns and Cautions section of our Vitamin D Supplements Review.

Curcumin & Prostate Cancer

3/26/2021
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Does curcumin benefit men undergoing chemotherapy for prostate cancer? See what a new study found in the What It Does section of our Turmeric and Curcumin Supplements & Spices Review. Also see our Top Picks among turmeric and curcumin products.

Vitamin D & Healing Bones

3/29/2021
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Broke a bone? A recent case shows how important sufficient vitamin D can be to properly heal a fracture. See the Bones and Fractures section of the Vitamin D Supplements Review. Also see our Top Picks among vitamin D supplements.

April

Fish Oil for Memory?

4/03/2021
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Can taking high-dose fish oil improve memory and cognitive function in older people with coronary artery disease? Find out what a recent study showed in the Age-related Cognitive Decline section of our Fish Oil Supplements Review. Also see our Top Picks among fish oil supplements.

Diabetes & Sardines

4/03/2021
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Can eating sardines reduce the risk of type 2 diabetes? See what a new study found in the What It Does section of our Tuna, Salmon & Sardines Review. Also see our Top Picks for sardines, canned salmon and tuna.

Learn about the effects of fish oil supplements on blood sugar and insulin sensitivity in our Fish Oil Supplements Review.

Vitamin D for ED?

4/05/2021
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Taking vitamin D may increase the benefits of a common medication for men, according to a recent study. Get the details in the What It Does section of our Vitamin D Supplements Review. Also see our Top Picks among vitamin D supplements.

Vitamin D & Muscle

4/08/2021
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Can taking high-dose vitamin D improve strength gains from exercise? See what a new study found in the What It Does section of our Vitamin D Supplements Review. Also see our Top Picks among vitamin D supplements.

Cranberry and UTIs

4/09/2021
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Two popular cranberry supplements promoted for urinary tract health were compared in a clinical study that showed one to be 4 times as effective as the other at preventing the adhesion of UTI-causing bacteria in urine. Get the details in our article about Cranberry and UTIs.