A multivitamin is a dietary supplement that contains a combination of essential vitamins and minerals in a single pill, gummy, or liquid. It typically includes vitamins A, B-complex, C, D, E, and K, plus minerals like calcium, magnesium, and zinc. Multivitamins are used to fill nutritional gaps in the diet and prevent deficiencies, though research shows most healthy people with balanced diets may not need them.
💡 What You Need to Know Right Away
- Cognitive benefits in older adults: Daily multivitamin supplementation improved episodic memory equivalent to reducing cognitive aging by approximately 2 years in adults over 65.[Evidence: B][3]
- Antioxidant effects confirmed: Plant-based multivitamin supplementation for 6-8 weeks showed measurable antioxidant effects in healthy subjects.[Evidence: A][2]
- Nutrient status improvement: Multivitamins improved vitamin C and zinc blood levels and self-reported health status in older adults within 12 weeks.[Evidence: B][4]
- Disease prevention is limited: Daily multivitamins did not significantly reduce cancer or cardiovascular disease incidence in large trials of 21,000+ adults.[Evidence: B][7]
If you have ever stood in the supplement aisle wondering whether a daily multivitamin is worth it, you are not alone. Over half of American adults take some form of vitamin supplement, making multivitamins the most popular category in the $50+ billion supplement industry.
It is common to feel overwhelmed by conflicting advice. Some headlines declare multivitamins are "essential," while others call them "a waste of money." The truth lies somewhere in between, and it depends largely on who you are and what your diet looks like.
This guide examines what the research actually shows. You will learn which groups genuinely benefit from multivitamins, what the science says about disease prevention, how to choose quality products, and when a multivitamin may do more harm than good. We cite 13 peer-reviewed studies so you can make an informed decision.
❓ Quick Answers
What is a multivitamin?
A multivitamin is a dietary supplement combining multiple vitamins and minerals in one dose. Most formulas include vitamins A, C, D, E, K, and B-complex, plus minerals like calcium, iron, magnesium, and zinc. They come as tablets, capsules, gummies, or liquids designed to help fill nutritional gaps in your diet.[Evidence: A][6]
How do multivitamins work?
Multivitamins provide micronutrients that support hundreds of biochemical reactions. Water-soluble vitamins (B-complex, C) assist energy metabolism and immune function. Fat-soluble vitamins (A, D, E, K) support vision, bone health, and cell protection. Minerals enable enzyme function and structural integrity.[Evidence: A][6]
What are the benefits of multivitamins?
Research shows multivitamins may improve cognitive function in older adults, with one meta-analysis finding benefits equivalent to reducing cognitive aging by 2 years.[Evidence: B][3] They also improve vitamin and mineral blood levels and may support antioxidant status.[Evidence: A][2]
How much multivitamin should I take?
Most adults take one standard multivitamin daily with food. Studies showing benefits used daily dosing for 12 weeks to 3 years.[Evidence: B][4] Do not exceed 100% Daily Value for most nutrients unless directed by a healthcare provider. Follow product label instructions for your specific formula.
Should I take a multivitamin?
It depends on your situation. Pregnant women benefit from prenatal vitamins with folic acid. Adults over 50 may need more B12 and vitamin D. Vegetarians, vegans, and those with restricted diets may have gaps. However, most healthy adults eating balanced diets do not show disease prevention benefits from multivitamins.[Evidence: B][7]
Do multivitamins really work?
Multivitamins effectively raise blood levels of vitamins and minerals within weeks.[Evidence: B][4] However, large trials found no significant reduction in cancer or cardiovascular disease in healthy older adults.[Evidence: B][7] For specific populations like pregnant women and seniors, targeted benefits are supported by expert consensus.[Evidence: D][10]
Who should take a multivitamin?
Groups most likely to benefit include: pregnant and breastfeeding women (prenatal vitamins with folate, iron, DHA), adults over 50 (B12, vitamin D), strict vegetarians and vegans (B12, iron, zinc), people with absorption disorders, and those on calorie-restricted diets. Expert consensus supports targeted supplementation for these groups.[Evidence: D][10]
Vitality Guide
"Bridging the nutritional gap between what we eat and what our bodies actually need for peak performance and longevity."
🔬 How Do Multivitamins Work?
Think of your body as a complex factory with thousands of assembly lines running simultaneously. Vitamins and minerals act as the specialized tools and lubricants that keep each line functioning smoothly. Without the right tools, production slows or stops entirely.
Multivitamins deliver these essential micronutrients through your digestive system. Water-soluble vitamins (the B-complex family and vitamin C) dissolve quickly and enter your bloodstream within hours. Your body uses what it needs and excretes the excess through urine. This means you need a steady daily supply.[Evidence: A][6]
Fat-soluble vitamins (A, D, E, and K) require dietary fat for absorption. They are stored in liver and fatty tissues, building up reserves over time. This storage capacity is why excessive intake can become problematic. Taking these vitamins with a meal containing fat improves absorption significantly.[Evidence: A][6]
At the cellular level, multivitamins support several key mechanisms:
- Antioxidant protection: Vitamins C and E neutralize harmful free radicals. A meta-analysis confirmed that plant-based multivitamin supplementation for 6-8 weeks showed measurable antioxidant effects in healthy subjects.[Evidence: A][2]
- Energy metabolism: B vitamins serve as coenzymes in converting food to cellular energy. Research shows multivitamin supplementation prevents or reverses decline in vitamin biomarkers and improves cellular energy metabolism in older men.[Evidence: B][13]
- Cognitive function: Multiple nutrients support brain health. Daily multivitamin supplementation showed more favorable 2-year change in episodic memory in older adults, with benefits equivalent to reducing cognitive aging by approximately 2 years.[Evidence: B][3]
- Immune support: Zinc, vitamin C, vitamin D, and other nutrients play roles in immune cell function. However, research found improved nutrient status does not necessarily translate to measurable changes in immune function markers in healthy older adults.[Evidence: B][4]
Imagine vitamins as keys that unlock specific doors in your metabolic pathways. Without the right key, the door stays closed, and the pathway cannot function optimally. Multivitamins provide a "master keyring" that ensures most common doors can be unlocked when needed.
📊 Dosage and How to Use
Multivitamin dosing depends on your goals, age, and health status. Research studies provide insights into effective dosing patterns, though individual needs vary.
| Purpose/Population | Dosage | Duration Studied | Evidence |
|---|---|---|---|
| Antioxidant effects (healthy adults) | 1 daily dose (plant-based MVM) | 6-8 weeks | [A][2] |
| Cognitive function (older adults 65+) | 1 daily dose | 2-3 years | [B][3] |
| Nutrient status improvement (older adults) | 1 daily dose | 12 weeks | [B][4] |
| Memory improvement (older adults) | 1 daily dose | 3 years | [B][5] |
| Cancer/CVD prevention assessment | 1 daily dose | 3.6 years (median) | [B][7] |
| Biomarker/metabolism (older men) | 1 daily dose | Not specified in abstract | [B][13] |
| Pregnancy/lactation (prenatal vitamins) | Per expert consensus: Iron + Vitamin D throughout; Folic acid + Iodine preconception through 2nd/3rd trimester | Preconception through lactation | [D][10] |
Timing Recommendations
With food: Take your multivitamin with a meal containing some fat. This improves absorption of fat-soluble vitamins (A, D, E, K). Iron in multivitamins may cause stomach upset on an empty stomach.
Morning vs. evening: Most people tolerate multivitamins well in the morning with breakfast. If your formula contains B vitamins, avoid taking it close to bedtime as some people report increased alertness.
Consistency matters: Studies showing cognitive benefits used daily dosing for 1-3 years.[Evidence: B][5] Sporadic use may not produce the same results. Choose a time you can maintain consistently.
Do not exceed label directions: Most multivitamins provide approximately 100% Daily Value. Taking multiple doses or combining with other supplements can lead to excessive intake, particularly of fat-soluble vitamins.
⚠️ Risks, Side Effects, and Warnings
While multivitamins are generally safe at recommended doses, they are not risk-free. Understanding potential adverse effects helps you use them safely.
Side Effects by Category
A systematic review of multivitamin safety identified the following concerns by vitamin type:[Evidence: A][6]
- Fat-soluble vitamins (A, E, D): Can cause serious adverse events due to accumulation in body tissues. Vitamin A toxicity may cause headaches, nausea, and liver damage. Vitamin D excess can lead to hypercalcemia.
- Water-soluble vitamins with significant toxicity: Folic acid and niacin have notable adverse effect profiles. High-dose niacin can cause flushing, liver problems, and glucose intolerance. Excessive folic acid may mask B12 deficiency.
- Generally well-tolerated: Biotin, pantothenic acid, riboflavin, thiamine, and B12 have minor adverse effects even at higher doses.
Drug Interactions
Inform your healthcare provider of all medications before starting a multivitamin:
- Blood thinners (warfarin): Vitamin K affects clotting. Consistent vitamin K intake is important. Sudden changes can alter anticoagulation control.
- Antibiotics: Minerals like calcium, magnesium, and zinc can reduce absorption of certain antibiotics (fluoroquinolones, tetracyclines). Separate doses by 2-4 hours.
- Thyroid medications: Calcium and iron interfere with levothyroxine absorption. Take thyroid medication separately, typically 4 hours apart.
- Chemotherapy: Some oncologists advise against antioxidant supplements during treatment due to theoretical concerns about reduced efficacy.
Contraindications
- Hemochromatosis: Avoid multivitamins with iron if you have iron overload conditions.
- Kidney disease: Impaired mineral excretion may require specially formulated supplements. Consult your nephrologist.
- Smokers: High-dose beta-carotene supplements have been associated with increased lung cancer risk in smokers. Choose formulas without high beta-carotene if you smoke.
⚠️ Important Safety Information
- Fat-soluble vitamins (A, D, E) can cause serious adverse events if taken in excess.[6]
- Keep multivitamins with iron away from children. Iron overdose is a leading cause of poisoning deaths in young children.
- Consult your healthcare provider before use if you are pregnant, breastfeeding, taking medications, or have chronic health conditions.
- Stop use and consult a doctor if you experience persistent nausea, vomiting, or signs of allergic reaction.
🥗 Practical Ways to Use Multivitamins
How to Use This in Your Daily Life
Scenario 1: Older Adults Seeking Cognitive Support
- Dose: 1 standard multivitamin daily[3]
- Duration: Studies showed benefits at 1 year with continued improvement through 3 years[5]
- Population: Adults over 60-65 years
- Timing: With breakfast
- What to track: Memory and cognitive sharpness (subjective)
- Expected results: Improved immediate recall performance, with effects equivalent to reducing cognitive aging by approximately 2 years[3]
Scenario 2: Pregnancy and Lactation
- Dose: Prenatal vitamin with iron, vitamin D, folic acid, and iodine[10]
- Duration: Preconception through lactation
- Population: Women planning pregnancy, pregnant, or breastfeeding
- Timing: With meals to reduce nausea
- What to track: Energy levels, prenatal checkup results
- Important note: Research found none of eight prenatal vitamins tested fully corrected all nutritional deficiencies. A nutrient-rich diet remains essential.[9]
Scenario 3: General Wellness (Healthy Adults)
- Dose: 1 standard multivitamin daily
- Duration: Ongoing if diet is suboptimal
- Population: Adults with nutritional gaps, restricted diets, or limited food variety
- Timing: With a fat-containing meal
- What to track: Overall energy and wellbeing (subjective)
- Realistic expectations: Improved nutrient blood levels within 12 weeks[4]. Do not expect disease prevention benefits based on current evidence[7]
Common Mistakes to Avoid
- Expecting disease prevention: Large trials found no significant reduction in cancer or cardiovascular disease in healthy adults.[7] Take multivitamins for nutritional insurance, not disease cure.
- Taking on an empty stomach: Fat-soluble vitamins absorb poorly without fat. Iron may cause nausea. Always take with food.
- Doubling up: If you miss a dose, do not take two the next day. Simply resume your normal schedule.
- Ignoring label directions: More is not better. Excessive intake of fat-soluble vitamins can cause harm.[6]
- Substituting for a healthy diet: No prenatal vitamin fully corrects dietary deficiencies.[9] Prioritize whole foods first.
Storage
Store multivitamins in a cool, dry place away from direct sunlight. Keep the bottle tightly closed. Avoid bathroom cabinets where humidity is high. Gummy vitamins degrade faster than tablets. Check expiration dates, as potency declines over time, especially for vitamin C and B vitamins.
⚖️ Multivitamins vs. Other Options
Should you take a multivitamin, individual supplements, or rely on food alone? Each approach has trade-offs.
| Factor | Multivitamin | Individual Supplements | Food Sources |
|---|---|---|---|
| Convenience | High. One pill covers many nutrients | Low. Multiple pills required | Medium. Requires meal planning |
| Customization | Limited. Fixed formula | High. Choose exactly what you need | High. Complete dietary control |
| Cost | Low. $0.10-0.30/day typically | Medium to High. Adds up quickly | Variable. Depends on food choices |
| Absorption | Variable. Some nutrients compete | Can optimize timing/combinations | Generally superior. Cofactors present naturally |
| Overdose Risk | Low at standard doses[6] | Higher. Easier to over-supplement | Very low. Difficult to overdose from food |
| Evidence for Benefits | Mixed. Cognitive benefits in elderly[3]; no disease prevention[7] | Varies by nutrient and condition | Strong. Nutrient-dense diets linked to health outcomes |
| Best For | Nutritional insurance; specific populations | Targeted deficiencies; medical conditions | Everyone as foundation |
The "Food First" Approach
Most nutrition experts recommend a "food first" approach. Whole foods provide vitamins and minerals alongside fiber, phytonutrients, and natural cofactors that enhance absorption. Research on prenatal vitamins found that none of eight products tested fully corrected dietary deficiencies, suggesting supplements cannot replace a nutrient-rich diet.[Evidence: D][9]
When Multivitamins Make Sense
Consider a multivitamin as "nutritional insurance" if you:
- Are over 50 and may absorb B12 less efficiently
- Follow a vegetarian, vegan, or restricted diet
- Are pregnant or planning pregnancy (prenatal formulas)
- Have limited food variety due to allergies, preferences, or access
- Have absorption disorders affecting nutrient uptake
For healthy adults eating a varied diet, the evidence does not support routine multivitamin use for disease prevention.[Evidence: B][7]
What The Evidence Shows (And Doesn't Show)
What Research Suggests
- Cognitive benefits in older adults: Daily multivitamin supplementation improved episodic memory at 1 year and across 3 years, with meta-analysis suggesting benefits equivalent to reducing cognitive aging by approximately 2 years (based on 3 studies within COSMOS trial, older adults mean age 69.6).[Evidence: B][3][5]
- Antioxidant effects: Plant-based multivitamin supplementation for 6-8 weeks showed measurable antioxidant effects in healthy subjects, though bioavailability varies across formulations.[Evidence: A][2]
- Nutrient status improvement: Multivitamin supplementation improved vitamin C and zinc blood levels and self-reported health status within 12 weeks in healthy older adults.[Evidence: B][4]
- Biomarker improvement: Multivitamin/mineral supplementation prevented or reversed decline in vitamin biomarkers and improved cellular energy metabolism in healthy older men.[Evidence: B][13]
- Pregnancy support (expert consensus): International expert consensus recommends iron and vitamin D throughout pregnancy and lactation, with folic acid and iodine from preconception.[Evidence: D][10]
What's NOT Yet Proven
- Cancer prevention: Daily multivitamins did not significantly reduce total cancer incidence in 21,442 older adults over 3.6-year median follow-up (COSMOS trial).[7]
- Cardiovascular disease prevention: A meta-analysis found no association between multivitamin use and reduced CVD outcomes including CHD, stroke, or cardiovascular mortality.[11]
- Eye disease prevention: Multivitamin supplementation may not prevent development of late age-related macular degeneration; zinc and carotenoids (lutein/zeaxanthin) showed better results for visual acuity.[12]
- Immune function changes: Despite improving nutrient status, one RCT found no alteration in measured immune function markers in healthy older adults.[4]
- Optimal dosing: Studies used varying formulations and durations. Exact dose-response relationships remain unclear.
- Long-term outcomes beyond 5 years: Most trials have median follow-up under 4 years. Effects of longer-term use are understudied.
- Benefits in younger, healthy adults: Most evidence comes from older adult populations. Benefits in younger adults with adequate diets are not established.
Where Caution Is Needed
- Fat-soluble vitamin accumulation: Vitamins A, D, E can cause serious adverse events due to tissue accumulation. Avoid high-dose or multiple supplements containing these.[Evidence: A][6]
- Folic acid and niacin toxicity: These water-soluble vitamins have significant adverse effect profiles at high doses.[6]
- Prenatal vitamin limitations: Research found none of eight prenatal vitamins fully corrected identified nutritional deficiencies in pregnant and postpartum women. Dietary improvement remains essential.[9]
- Drug interactions: Vitamin K affects anticoagulation. Minerals interfere with antibiotic and thyroid medication absorption. Always disclose supplement use to healthcare providers.
- Heterogeneous formulations: Bioavailability varies across products. Third-party testing shows some products fail to meet label claims.
Should YOU Try This?
Best suited for: Adults over 50 (cognitive support, B12, vitamin D), pregnant and breastfeeding women (prenatal formulas), strict vegetarians and vegans (B12, iron, zinc), individuals with nutrient absorption disorders, and those with restricted or limited diets.
Not recommended for: Those with hemochromatosis (avoid iron), kidney disease (consult nephrologist), smokers (avoid high beta-carotene). Healthy younger adults eating balanced, varied diets do not show disease prevention benefits from routine multivitamin use.
Realistic timeline: Nutrient blood levels may improve within 12 weeks.[4] Cognitive benefits were observed at 1 year with continued improvement through 3 years.[5] Do not expect rapid or dramatic effects.
When to consult a professional: Before starting if you take prescription medications, have chronic health conditions, are pregnant or breastfeeding, or have concerns about nutrient deficiencies. A registered dietitian can assess your diet and recommend targeted supplementation if needed.
Frequently Asked Questions
When should I take my multivitamin?
Take your multivitamin with a meal that includes some fat. Fat-soluble vitamins (A, D, E, K) require dietary fat for absorption. Breakfast or lunch works well for most people. Studies on cognitive benefits used daily dosing, suggesting consistency matters more than specific timing. If your formula contains B vitamins, some people prefer morning dosing to avoid potential sleep interference. Iron-containing formulas may cause stomach upset if taken without food. Pick a time you can maintain daily for best results.
Can taking too many vitamins be harmful?
Yes. A systematic review found that fat-soluble vitamins (A, E, D) can cause serious adverse events because they accumulate in body tissues. Vitamin A toxicity causes headaches, nausea, and liver damage. Excessive vitamin D leads to hypercalcemia with symptoms including weakness and kidney problems. Even water-soluble vitamins like folic acid and niacin have significant toxicities at high doses. Stick to products providing approximately 100% Daily Value unless your healthcare provider directs otherwise.
What should I look for when choosing a multivitamin?
Look for a product appropriate for your age, sex, and life stage. Choose formulas that provide around 100% Daily Value for most nutrients, avoiding 'mega-dose' products. Check for third-party certification (USP, NSF, ConsumerLab) to verify quality and label accuracy. For older adults, ensure adequate B12 and vitamin D. Pregnant women should select prenatal formulas with adequate folate, iron, and iodine. Avoid products with excessive amounts of any single nutrient.
Can supplements be taken with medications?
Many can, but interactions exist. Vitamin K affects warfarin anticoagulation. Minerals (calcium, magnesium, zinc, iron) reduce absorption of certain antibiotics and thyroid medications. Some oncologists advise against antioxidants during chemotherapy. Always inform your healthcare provider about all supplements you take. For specific interactions, consult a pharmacist. When in doubt, separate supplement and medication doses by 2-4 hours, and verify safety with your prescriber.
What are the side effects of multivitamins?
At standard doses, most people tolerate multivitamins well. Common complaints include nausea or stomach upset, especially when taken without food or with iron-containing formulas. A systematic review categorized vitamin toxicities: fat-soluble vitamins (A, D, E) can cause serious adverse events; folic acid and niacin have significant toxicity potential; while biotin, pantothenic acid, riboflavin, thiamine, and B12 have only minor adverse effects. Allergic reactions are rare but possible.
Are multivitamins better than individual vitamins?
Neither is universally 'better.' Multivitamins offer convenience and broad coverage at lower cost. Individual supplements allow targeted dosing and avoid nutrients you do not need. If you have a specific deficiency (like B12 in vegetarians or vitamin D in northern climates), a single-nutrient supplement may be more effective. If you want general nutritional insurance without managing multiple bottles, a multivitamin is simpler. The COSMOS trial tested a standard multivitamin formulation and found cognitive benefits in older adults.
Can you overdose on multivitamins?
Yes, particularly with fat-soluble vitamins and iron. Standard once-daily multivitamins at recommended doses are generally safe. Danger arises from taking multiple supplements, high-dose formulas, or accidental ingestion by children. Iron overdose is a leading cause of poisoning deaths in young children. Signs of vitamin toxicity include nausea, vomiting, headache, and fatigue. Fat-soluble vitamin accumulation can cause serious long-term harm. Store supplements safely and never exceed label directions.
Do multivitamins prevent disease?
Current evidence does not support multivitamins for disease prevention in healthy adults. The COSMOS trial (21,442 participants, median 3.6 years) found daily multivitamins did not significantly reduce total cancer incidence. A meta-analysis found no association between multivitamin use and reduced cardiovascular disease, coronary heart disease, stroke, or cardiovascular mortality. Another meta-analysis found multivitamins may not prevent late age-related macular degeneration. Take multivitamins for nutritional support, not disease prevention.
Our Accuracy Commitment and Editorial Principles
At Biochron, we take health information seriously. Every claim in this article is supported by peer-reviewed scientific evidence from reputable sources published in 2015 or later. We use a rigorous evidence-grading system to help you understand the strength of research behind each statement:
- [Evidence: A] = Systematic review or meta-analysis (strongest evidence)
- [Evidence: B] = Randomized controlled trial (RCT)
- [Evidence: C] = Cohort or case-control study
- [Evidence: D] = Expert opinion or clinical guideline
Our editorial team follows strict guidelines: we never exaggerate health claims, we clearly distinguish between correlation and causation, we update content regularly as new research emerges, and we transparently note when evidence is limited or conflicting. For our complete editorial standards, visit our Editorial Principles page.
This article is for informational purposes only and does not constitute medical advice. Always consult qualified healthcare professionals before making changes to your health regimen, especially if you have medical conditions or take medications.
References
- 1 . The Efficacy of Multivitamin, Vitamin A, Vitamin B, Vitamin C, and Vitamin D Supplements in the Prevention and Management of COVID-19 and Long-COVID: An Updated Systematic Review and Meta-Analysis of Randomized Clinical Trials, Nutrients, 2024; 16(9): 1345. PubMed | DOI [Evidence: A]
- 2 . Meta-Analysis of Randomized Clinical Trials Evaluating Effectiveness of a Multivitamin Supplementation against Oxidative Stress in Healthy Subjects, Nutrients, 2022; 14(6): 1170. PubMed | DOI [Evidence: A]
- 3 . Effect of multivitamin-mineral supplementation versus placebo on cognitive function: results from the clinic subcohort of the COcoa Supplement and Multivitamin Outcomes Study (COSMOS) randomized clinical trial and meta-analysis of 3 cognitive studies within COSMOS, The American Journal of Clinical Nutrition, 2024; 119(3): 692-701. PubMed | DOI [Evidence: B]
- 4 . The Effect of a Multivitamin and Mineral Supplement on Immune Function in Healthy Older Adults: A Double-Blind, Randomized, Controlled Trial, Nutrients, 2020; 12(8): 2447. PubMed | DOI [Evidence: B]
- 5 . Multivitamin Supplementation Improves Memory in Older Adults: A Randomized Clinical Trial, The American Journal of Clinical Nutrition, 2023; 118(1): 273-282. PubMed | DOI [Evidence: B]
- 6 . Multivitamin/mineral supplements: Rationale and safety - A systematic review, Nutrition, 2017; 33: 76-82. PubMed | DOI [Evidence: A]
- 7 . Multivitamins in the prevention of cancer and cardiovascular disease: the COcoa Supplement and Multivitamin Outcomes Study (COSMOS) randomized clinical trial, The American Journal of Clinical Nutrition, 2022; 115(6): 1501-1510. PubMed | DOI [Evidence: B]
- 8 . Effect of cocoa flavanol supplementation for the prevention of cardiovascular disease events: the COcoa Supplement and Multivitamin Outcomes Study (COSMOS) randomized clinical trial, The American Journal of Clinical Nutrition, 2022; 115(6): 1490-1500. PubMed | DOI [Evidence: B]
- 9 . A Pilot Evaluation of the Adequacy of Prenatal Vitamins to Cover Dietary Deficits During Pregnancy and Lactation, Reproductive, Female and Child Health, 2025; 4(1): e70012. PubMed | DOI [Evidence: D]
- 10 . International expert consensus on micronutrient supplement use during the early life course, BMC Pregnancy and Childbirth, 2025; 25(1): 44. PubMed | DOI [Evidence: D]
- 11 . Association of Multivitamin and Mineral Supplementation and Risk of Cardiovascular Disease: A Systematic Review and Meta-Analysis, Circulation: Cardiovascular Quality and Outcomes, 2018; 11(7): e004224. PubMed | DOI [Evidence: A]
- 12 . Efficacy of different nutrients in age-related macular degeneration: A systematic review and network meta-analysis, Seminars in Ophthalmology, 2022; 37(4): 515-523. PubMed | DOI [Evidence: A]
- 13 . Multivitamin/Multimineral Supplementation Prevents or Reverses Decline in Vitamin Biomarkers and Cellular Energy Metabolism in Healthy Older Men: A Randomized, Double-Blind, Placebo-Controlled Study, Nutrients, 2023; 15(12): 2691. PubMed | DOI [Evidence: B]
Medical Disclaimer
This content is for informational and educational purposes only. It is not intended to provide medical advice or to take the place of such advice or treatment from a personal physician. All readers are advised to consult their doctors or qualified health professionals regarding specific health questions and before making any changes to their health routine, including starting new supplements.
Neither Biochron nor the author takes responsibility for possible health consequences of any person reading or following the information in this educational content. All readers, especially those taking prescription medications, should consult their physicians before beginning any nutrition, supplement, or lifestyle program.
If you have a medical emergency, call your doctor or emergency services immediately.
