Showing Results for Vitamin Research
Product Reviews (3)
CL Answers (83)
A blood test showed my vitamin D level is low. How do I know how much vitamin D to take?
Find out how to increase vitamin D blood levels, including a good target range.
Can taking B vitamin supplements help protect against mosquito bites?
Find out if taking B vitamin supplements can reduce the attraction of mosquitoes to people.
Supplements for multiple sclerosis (MS): Do any supplements reduce symptoms or relapse?
Find out if vitamins or supplements such as ginkgo, fish oil, biotin, vitamins A, C, E, D, and B12, or selenium reduce symptoms or relapse in people with multiple sclerosis (MS).
Do any supplements or foods benefit people with Crohn's disease? Are there any supplements that should be avoided?
Find out the most common vitamin and mineral deficiencies in people with Crohn's disease, including iron, B6, B12, vitamin D, zinc and others, plus evidence for N-acetyl-glucosamine (NAG), fish oil, and curcumin.
I've heard that taking vitamin D can reduce your natural production of melatonin and interfere with sleep. Is this true?
Can Vitamin D interfere with your body's melatonin production, and can taking vitamin D interfere with sleep?
Do any supplements improve balance or reduce the risk of falls?
Find out which vitamins & supplements may improve your balance to help reduce the risk of falling, including vitamin D and protein.
Do supplements help with Parkinson’s disease treatment or prevention?
Learn what has been shown with vitamins D and E, niacin, CoQ10, melatonin, creatine, SAMe, NAC, valerian, CoQ10, and CBD, as well as with coffee and the Mediterranean and MIND diets for treating and/or preventing Parkinson's disease.
I'm having trouble sleeping. Could this be caused by my supplements: a multivitamin, fish oil, magnesium, calcium, vitamins D and K, and protein. I'm also on a low-dose blood pressure medication.
Find out if vitamins & supplements can cause insomnia - multivitamins, fish oil, calcium, magnesium, protein & vitamin D. ConsumerLab.com's answer explains.
Do vitamin patches, such as for B12 or multivitamins, really work? How about those from PatchMD?
Do vitamin B12 Patches like PatchMD really work? Can you absorb vitamin B12 through patches?
Does Procera AVH really improve memory and mood?
Procera AVH information, including evidence from clinical studies on memory, cognition, mood, safety, and a lawsuit.
Which "whole food" multivitamins don't include synthetic vitamins? How about Complete Foods, Sunwarrior, Garden of Life, Nature's Brands, and Doctors' Research?
Find out which "whole food" multivitamins are only from foods and which include synthetic vitamins, including Complete Foods Nutrition-OctoMega MultiVitamin; Sunwarrior; Garden of Life-MyKind Organics; Nature's Brands-PhytoVitamins; Doctors' Research MultiVitamin.
What is the best source of vitamin D3 -- from lanolin in sheep's wool or from fish oil?
Learn more about vitamin D3 sources, such as lanolin (from wool) and fish oil, as well as their prices and their effects.
Does Qualia Mind boost memory and mental function and is it worth cost?
Learn about the ingredients in Qualia Mind, whether or not we think the formula works and is safe, and if we think it's worth the cost.
What are the benefits of grape seed extract?
Learn about the health benefits of grape seed extract, and find out it improves venous insufficiency, leg swelling, swelling after surgery, or can help to lower blood pressure.
Are vitamin D oral sprays more effective than vitamin D pills or drops?
Learn more about vitamin D oral sprays, pills, and drops, including a price comparison.
Does taking curcumin and boswellia together increase their individual anti-inflammatory effects?
Find out if taking boswellia and curcumin together can increase their individual anti-inflammatory effects. ConsumerLab.com's answer explains.
I've heard that soaking dried beans for 24 hours reduces the phytate level, allowing for greater access to nutrients. Is this true?
Does soaking dried beans in water help reduce phytate levels to help gain greater access to nutrients?
Does taking zinc help with sleep?
Taking zinc to help you sleep? Find out if taking zinc really can help with sleep and insomnia. ConsumerLab.com's answer explains.
Can taking curcumin reduce the risk of certain cancers or help treat existing cancers?
Find out if curcumin can help prevent cancers such as colon cancer and myeloma from developing and if it has any benefit for people with existing cancer.
I read an article stating that some of the ingredients in Centrum multivitamins may be dangerous or toxic. Is that true?
Learn more about the safety of ingredients in Centrum, including binders, fillers, and coloring agents.
Can supplements with antioxidants like beta-carotene and vitamins A and E cause you to die sooner?
Learn more about antioxidants like beta-carotene, vitamin A, vitamin E, and their effect on mortality, or premature death.
What is the benefit of magnesium orotate compared to other forms of magnesium?
Find out if magnesium orotate is the best form of magnesium for supplements, including safety concerns.
Does AZO Bladder Control really work for overactive bladder?
AZO Bladder Control information, including results from clinical studies on bladder control, dosage, and safety.
Can supplements improve symptoms of dry eye?
Can supplements such as fish oil, flaxseed oil or curcumin (from turmeric) help treat dry eyes? Find out, including formulas and doses that have shown benefit.
Do brain games and apps really work and improve memory?
Find out if brain training games & apps, like Lumosity & BrainHQ, really work to train the mind and improve memory. ConsumerLab.com's answer explains.
I'm trying to pick a good multivitamin for my children and husband, and for myself. Any suggestions based on your research?
Find out how to pick the best multivitamin for you and your family, based on diet, price, and effectiveness.
Can taking CoQ10 affect my thyroid levels or interact with my thyroid medication?
Learn more about CoQ10 and thyroid medications along with natural thyroid function. ConsumerLab.com's answer explains.
What are the health benefits of amla and is it safe?
Learn about amla (Indian gooseberry), including its potential health benefits and possible safety concerns.
What is Brain Bright and can it really improve memory or cognition?
Learn more about BrainBright, including clinical studies on memory and cognition, safety, and cost.
Is it possible to get too much vitamin D?
Too much vitamin D can lead to adverse effects, including hypercalcemia (excess calcium in the blood).
Does Z-Stack multivitamin work to boost the immune system, and is it safe?
Find out about Z-Stack, including if it can help boost the immune system and if it is safe to use at the suggested dose.
Can taking too much vitamin B-6 be dangerous? The label on my multivitamin states it contains 2000% of the Daily Value!
Find out if multivitamins contain excessive amounts of B-6, how much B-6 is too much, and symptoms of toxicity and overdose.
Which supplements help reduce the risk of colorectal cancer?
Find out which supplements may reduce the risk of colorectal cancer, including folate, fiber, selenium, and vitamin D.
What is vitamin B12 and how much do I need?
Vitamin B12 dosage varies depending on your age, gender, and various other factors. Our CL Answer explains why B12 is important, the recommended dosages, deficiency, health benefits, and the best form.
Do any supplements help prevent or treat osteoporosis?
If you have osteoporosis, you may be interested in supplements for bone health. Find out which supplements can increase bone strength and density.
What is BPC-157, what is it used for and is it safe?
Find out about BPC-157, including what it's promoted for and if it is safe.
Can coconut water prevent or dissolve kidney stones?
Find out if coconut water can help prevent kidney stones, or dissolve them, by increasing urinary citrate, or if there are better ways. ConsumerLab.com's answer explains.
Is it true that glucosamine and chondroitin can reduce the risk of death, like aspirin?
Find out if glucosamine and chondroitin, like aspirin, have been shown to reduce the risk of death. ConsumerLab.com's answer explains.
Does CBD help fight colds or the flu?
Find out if CBD (cannabidiol) can help to fight colds or the flu. ConsumerLab.com's answer explains.
Does consuming casein protein, like in Greek yogurt, increase the risk of prostate cancer?
Find out if consuming casein protein, found in Greek yogurt and other dairy products, increases the risk of prostate cancer.
Does resveratrol really activate SIRT1 - the "longevity" gene?
Find out if Resveratrol activates the SIRT1 gene, the "longevity" gene, including evidence, tips for taking, dosage and more.
I'd like to know which supplements may help with my different medical conditions. What's the best way to look this up on ConsumerLab.com?
Learn more about how to use ConsumerLab.com to get the best information regarding supplements and brand testing. Our answer explains.
How much resveratrol is in wine? Is it enough to have a benefit?
Find out how much resveratrol wine contains and if it is enough to have a benefit.
Do any supplements help with the coronavirus (COVID-19)? Do supplements like vitamin D, zinc, vitamin C, or herbals work?
Find out if natural remedies & supplements for coronavirus such as zinc, vitamin C, garlic, or elderberry help to prevent or treat COVID-19.
Are there any supplements I should avoid when taking acetaminophen (Tylenol)?
Find out if there are any supplements that should be avoided when taking acetaminophen (Tylenol).
What are the best supplements for depression and anxiety?
Best natural supplements for depression and anxiety, including the evidence for fish oil, vitamin D, probiotics, and herbal supplements for depression such as curcumin (from turmeric) and saffron.
As vitamin D is a fat-soluble vitamin, why is it necessary to take it every day?
Find out how best to take vitamin D supplements, including cautions on overdoses.
Can lysine, vitamin B-12, or other vitamins or minerals help prevent or reduce canker sores?
Lysine, B12, zinc and other vitamins and minerals for canker sores. Find out what supplements can help prevent or reduce canker sores.
Do Vital 3 collagen drops really help for joint pain?
Learn more about Vital 3 collagen drops withundenatured type II collagen, and if they can help joints move better and feel better.
Can magnesium supplements reduce heart palpitations or PVCs?
Having low blood levels of magnesium has been associated with abnormal heart rhythms known as PVCs (premature ventricular complexes). Find out if taking magnesium supplements can help.
Do supplements help treat peptic ulcer disease? Should any be avoided?
Vitamins and supplements that may help with peptic ulcer disease, including probiotics, cranberry, melatonin, lactoferrin, berberine, and licorice.
Does I3C (from broccoli) or DIM (a related chemical) reduce the risk of cancer?
Find out if the compound indole-3-carbinol (I3C), from broccoli, and its metabolite diindolylmethane (DIM) can reduce the risk of cancer. ConsumerLab.com's answer explains.
Do any supplements help treat or reduce the pain of plantar fasciitis (heel pain)?
Plantar fasciitis causing heel pain has, in rare cases, been reported as a symptom of vitamin D deficiency. Other supplements that have been proposed to help include vitamin C, zinc, curcumin (from turmeric), bromelain, collagen and glucosamine. Find out what the evidence shows, and what other treatments may help.
Do any supplements help with fatty liver disease? Are some diets more beneficial than others?
Find out if supplements such as vitamin E, fish oil, milk thistle, curcumin, choline, probiotics, vitamin D, reishi mushroom, or extra virgin olive oil are beneficial for fatty liver disease and learn which diet (Mediterranean, ketogenic, DASH, or fasting diets) seems to have greatest benefit.
What is monolaurin? Can it really prevent colds, cold sores, or other infections?
Lauricidin (monolaurin) information for preventing colds, immune system function, and safety.
What are the health benefits of avocado oil? Is it healthier than olive oil? Which avocado oils are best?
Learn about the health benefits of avocado oil and how it compares to olive oil, evidence for heart health, osteoarthritis and other uses. ConsumerLab.com's answer explains.
Why does my multivitamin make me nauseous? Is there anything that can help?
Find out if ingredients in multivitamins can cause nausea and gastrointestinal discomfort.
I was told I have a MTHFR gene mutation. What do I need to know about taking B vitamins?
MTHFR gene mutation can impact B vitamin bioavailability. Learn more about this and which deficiencies are more likely to occur.
I take lisinopril (Zestril), an ACE inhibitor drug to lower blood pressure. Are there supplements I should avoid, or be taking, due to this drug?
When taking ACE inhibitors, find out which supplements should be avoided. Interaction info on Lisinopril or another ACE inhibitors.
Do lion's mane supplements improve memory or cognitive function in older adults?
Lion's mane has been studied for its effects on cognitive function and memory, but its effects are still unclear.
Are there any supplements I should avoid when taking an antibiotic? Are there any that may be helpful?
Find out which supplements can negatively interact with antibiotics, including vitamin K, magnesium, and calcium, and which may be helpful when taking antibiotics.
How significant are the risks to drinking tea from China from heavy metals?
Find out which types of tea from China pose the greatest risk of toxic heavy metal contamination, including green tea.
Do any supplements help for flu?
Which supplements may help prevent or reduce symptoms of colds or the flu, including vitamin D, ginseng, NAC, and elderberry.
Can supplements help me lose weight?
Learn more about weight loss supplements, including our lab test results and product comparisons.
Can L-theanine help as a sleep aid? Will ConsumerLab.com be testing these supplements?
Learn more about L-theanine and its impact on sleep. Plus, see our test results of popular L-theanine supplements.
Is MitoQ a better form of CoQ10?
MitoQ information, including how it is absorbed in the body and how it compares to CoQ10.
Does drinking coffee increase or decrease the risk of cancer? Can it slow cancer progression?
Learn more about coffee, its safety, if it's good for you, and if it impacts your risk of cancer.
Do any supplements reduce side of effects of chemotherapy?
Find out if there are any supplements that can help with the side effects of chemotherapy, such as nausea, vomiting, diarrhea, nerve damage and others. ConsumerLab.com's answer explains.
Which supplements help with Raynaud's phenomenon?
Raynaud's phenomenon may be helped by some supplements. Learn more about fish oil, Gingko biloba, and ginseng.
Which supplements help for osteoarthritis of the hip?
Supplements for hip pain and osteoarthritis, such as SAMe, ginger and collagen, may help or reduce pain.
Do any supplements help relieve stress?
Are there actually supplements for stress relief and panic attacks? Learn more about holy basil, fish oil, L-theanine, and ginseng.
Is there evidence that d-limonene can help fight cancer?
Find out if d-limonene can help fight cancer or help for GERD (gastroesophageal reflux disorder), including evidence from clinical studies.
Which supplements or foods can help lower cholesterol and keep my heart healthy? Are there any to avoid?
Information about heart health supplements & vitamins that help with cholesterol, including sterol esters, CoQ10, and vitamin D, and which may be bad for the heart, like calcium.
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?
Is it possible for prenatal vitamins to have too much folic acid? Find out the correct dosage so that it is not dangerous to babies.
I'm at risk for both macular degeneration and Alzheimer's disease. I've read that more EPA than DHA is good for macular degeneration, but the reverse is true for Alzheimer's. What do you recommend?
Find out if taking fish oil supplements or eating fish can help for macular degeneration and Alzheimer's disease. ConsumerLab.com's answer explains.
Do any supplements help for restless legs syndrome?
Find out whether supplements or vitamins like iron, magnesium, vitamin E and others can help for restless leg syndrome (RLS). ConsumerLab.com's answer explains.
Is there a danger in taking lecithin or phosphatidylcholine? I heard that they may increase the risk of heart attacks.
Lecithin, phosphatidylcholine and choline - Learn more about the potential link between them and cardiovascular disease.
Do any supplements help prevent or treat a cold?
Are there supplements that can help prevent or treat cold symptoms? Learn more about zinc, probiotics, vitamin C and more.
Can vitamin K2 really help decrease calcium in the arteries?
Learn more about vitamin K2 and the impact on calcium in the heart and arteries, and find out if vitamin K can help with coronary heart disease.
When choosing a protein powder, which protein source is best -- whey, casein, soy, pea, rice, hemp or egg?
Protein powder information including the various sources of protein, including whey, casein, soy, pea, rice, hemp and egg.
Can drinking coffee weaken bones or make arthritis worse?
Learn about the effects of coffee intake on bone mineral density, risk of osteoporosis, and risk of fracture. Also, find out if drinking coffee might increase the risk of arthritis or worsen symptoms.
I'm over 50 and looking to take a vitamin B-12 supplement. Many contain a form of vitamin B-12 called cyanocobalamin, yet I read on the Internet that this form is toxic. Should I be concerned?
Looking to see if the cyanocobalamin form of vitamin B-12 is safe? Read research and safety information on ConsumerLab's report.
My doctor told me to stop taking supplements because my kidney function was low. After stopping, my kidney function returned to normal. Can taking a lot of supplements really damage the kidneys?
Find out which supplements may damage your kidneys. ConsumerLab explores possible kidney side effects of supplements including chromium, creatine, and vitamin C.
Recalls & Warnings (39)
Health Research Labs Agrees to Settle FTC Charges of False Claims, Deceptive Marketing of BioTherapex and NeuroPlus
Cardio, Energy and Sexual Enhancement Supplement Distributor Warned For Manufacturing Violations and Drug Claims
Court Orders Marketers of Supreme Greens and Coral Calcium to Pay Nearly $70 Million for Consumer Refunds
Chiropractor Who Claimed Vitamin D and Zinc Work Better Than COVID Vaccines Charged by FTC
Maker of Cholesterol and Workout Supplements Warned For Manufacturing Violations, Drug Claims and Unapproved Ingredient
Supplement Maker to Pay over $3.5 Million to Settle Deceptive Advertising Charges for Immune Dietary Supplement
Supplement Company to Pay over $3.5 Million to Settle Deceptive Advertising Charges for ImmuneDietary Supplement
Clinical Updates (52)
Up To a Point, Alzheimer's Risk Falls with Vitamin D
Optimum Level of Vitamin D
Type 2 Diabetes and Vitamin D
Vitamin D Supplements: Same Dose, Different Results?
Vitamin C for Bleeding Gums?
Vitamin D & Diabetes
Football & Vitamin D
Vitamin D for Autism
How Vitamin B6 May Backfire
Too much vitamin D may increase the risk of dying
Can Vitamin E and/or Selenium Help Prevent Cataracts?
How To Get Vitamin K From Food
Surprising Role of Potassium in COVID-19
Does Taking Vitamin D Reduce the Risk of Heart Disease?
Concern Over Carnitine Causing Cardiovascular Disease
For more details, see the updated reviews of B Vitamin Supplements & Energy Drinks and Protein Powders, as some of these products contain L-carnitine. The Acetyl-L-Carnitine Supplements review has also been updated because acetyl-L-carnitine is chemically similar to L-carnitine, suggesting a potential concern.
Declining Vaccine Protection
Feeling fatigued? Iron may help
Glucosamine May Increase Eye Pressure
What You Need to Know About Fish Oil
Magnesium and Bone Health
Selenium and Prostate Cancer
Melatonin Increases Bone Density
Probiotics May Not Work As Thought
Resveratrol for Alzheimer's Disease?
Curcumin May Help Prevent Diabetes
Insulin Sensitivity and Magnesium
Omega-3s Drop in Farmed Salmon
Prebiotics for Appetite Control?
Acetyl-L-carnitine + Alpha-Lipoic Acid for Lowering Blood Pressure?
Caution With Melatonin & Diabetes
Curcumin for Blood Sugar Control?
CoQ10 for Migraine
Probiotics a Waste of Money?
Caveat With Prescription Fish Oil Study
NAC and Lung Cancer
Can Collagen Lower Blood Sugar?
Artichoke for Lowering Cholesterol?
Human Milk Oligosaccharides (HMOs) for IBS?
Copper and Alzheimer's Disease
Mushrooms and Blood Sugar
Coffee and Arterial Stiffness
Coffee And Fatty Liver Disease?
Bergamot for lowering cholesterol?
Mixing Boosters for J&J Recipients?
A Sunscreen Combination to Avoid
Magnesium for Parkinson's Disease?
Fish Oil Interaction With Medication
Coffee and Heart Disease
Saw Palmetto May Not Work
What should you do? You may want to consider a different supplement -- beta-sitosterol, a phytosterol. The evidence remains fairly good for beta-sitosterol. To find out more about saw palmetto, beta-sitosterol, and the supplements we have tested, see the Prostate Supplements Review. More >>