Women's Complete Multivitamin

Women's Complete Multivitamin

Bayer One A Day Women's4.6 (8,100 ratings)
Format:Tablet Quantity: 200 Tablet(s) · 200 servings
Goals
$17.48 $0.08 per serving

Product analysis

50 out of 100

Women's Complete Multivitamin provides economical nutritional support for normal immune functions and energy use. Many nutrient forms are not clearly stated, making precise comparisons harder.

AI assessment of the formula, label and price. How scoring works

Nutrient Quality22

Many nutrient forms are not stated clearly enough for a precise quality comparison. Some additional source detail is available, but it does not resolve absorption quality across the combination.

Ingredient Transparency66

All nutrient amounts are disclosed, making serving comparisons easier. Most forms are absent from their main declarations, although niacinamide appears elsewhere in the ingredient list.

Value For Money54

The low serving price compares very favorably for iron, iodine and niacin. Value for most other nutrients remains uncertain, and the earlier copper comparison may no longer be current.

Customer Satisfaction88

Customer ratings are strongly favorable across several thousand reviews. That gives a broad picture of satisfaction without establishing health benefits.

Product Focus42

The nutrients share basic roles in normal immune and energy functions. The broad combination is most useful when it addresses relevant dietary gaps.

Format
Tablet
Container
200 Tablet(s)
Per serving
$0.08
Customer rating
4.6 · 8,100 ratings
Report analysis

Goals

Impact
Moderate effect
C Ingredient FitF PathwaysA+ EvidenceA+ Formulation Logic
Iodine · 150 mcgVitamin D · 25 mcgVitamin B5 · 7.5 mgMagnesium · 42 mgRiboflavin · 1.95 mgThiamin · 2.4 mgVitamin B12 · 9.6 mcgIron · 18 mg
Study evidence
Iodine Adverse 3 studies
Iron Supportive 74 studies
Magnesium Supportive 4 studies
Thiamin Disputed 12 studies
Vitamin D Supportive 32 studies
Immunity
Impact
High effect
C Ingredient FitD+ PathwaysA+ EvidenceA+ Formulation Logic
Magnesium · 42 mgVitamin C · 90 mgZinc · 8 mgVitamin A · 700 mcgVitamin D · 25 mcgSelenium · 41 mcg
Study evidence
Iron Supportive 23 studies
Magnesium Supportive 8 studies
Selenium Mixed 37 studies
Vitamin A Supportive 107 studies
Vitamin C Supportive 53 studies
Vitamin D Supportive 85 studies
Vitamin E Supportive 21 studies
Zinc Supportive 73 studies
Hair Health
Impact
High effect
C+ Ingredient FitF PathwaysA+ EvidenceA+ Formulation Logic
Biotin · 45 mcgVitamin D · 25 mcgZinc · 8 mgIron · 18 mgVitamin C · 90 mg
Study evidence
Biotin Supportive 4 studies
Copper Adverse 4 studies
Folate Mixed 15 studies
Iodine No effect 1 study
Iron Disputed 25 studies
Niacin Disputed 2 studies
Selenium Disputed 7 studies
Vitamin A Disputed 13 studies
Vitamin D Disputed 34 studies
Vitamin E No effect 3 studies
Zinc Supportive 22 studies
Productivity Boost
Impact
Moderate effect
D- Ingredient FitF PathwaysA EvidenceA+ Formulation Logic
Iron · 18 mgVitamin B12 · 9.6 mcgVitamin B12 · 9.6 mcgVitamin B6 · 3.4 mgZinc · 8 mgMagnesium · 42 mg
Study evidence
Iron Supportive 69 studies
Magnesium Supportive 10 studies
Zinc Supportive 11 studies
Fitness
Impact
Lower effect
D- Ingredient FitF PathwaysC+ EvidenceA+ Formulation Logic
Magnesium · 42 mgVitamin D · 25 mcg
Study evidence
Iron Supportive 81 studies
Magnesium Disputed 29 studies
Vitamin C No effect 17 studies
Vitamin D Disputed 163 studies
Zinc Supportive 7 studies

Ingredients

IngredientAmount per servingScore
Vitamin A
700 mcg
Vitamin C
90 mg
Vitamin D
25 mcg
Vitamin E
15 mg
Thiamine
2.4 mg
Riboflavin
1.95 mg
Niacin
24 mg 70
Vitamin B6
3.4 mg
Folate
665 mcg DFE
Vitamin B12
9.6 mcg
Biotin
45 mcg
Pantothenic Acid
7.5 mg
Calcium
130 mg
Iron
18 mg 63
Iodine
150 mcg 88
Magnesium
42 mg
Zinc
8 mg
Selenium
41 mcg
Copper
1.35 mg 55
Women 18–50
Report overview
Iodine · 150 mcg OverallScore88
C+ Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyA+ Value
A serving provides 150 mcg iodine. The cost per serving is low. Potassium Iodide appears in Other Ingredients; the source of the stated iodine amount is not specified.
How this ingredient is rated

Active Ingredient Quality & Bioavailability69

Potassium Iodide appears in Other Ingredients; the source of the stated iodine amount is not specified.
Iodine Form & Bioavailability
Potassium Iodide appears in Other Ingredients; the source of the stated iodine amount is not specified.
Marine Source Purity & Sourcing
Marine-source contamination concerns do not apply to the stated non-marine source.

Dose, Safety & Label Transparency100

A serving provides 150 mcg iodine.
Dosage Efficacy for Daily Support
A serving provides 150 mcg iodine.
Dosage Safety & Upper Limits
The 150 mcg iodine per serving is below the adult upper intake level.
Elemental Iodine Transparency
The iodine amount per serving is stated.

Value100

The cost per serving is low.
Price Per Effective Serving
The cost per serving is low.
Iron · 18 mg OverallScore63
F Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyA+ Value
The serving provides 18 mg of iron at a low cost per serving. Ferrous fumarate is named, but another iron source and the proportions are unknown. Zinc is also listed and may compete with iron absorption.
How this ingredient is rated

Active Ingredient Quality & Bioavailability6

Ferrous fumarate is named, but another iron source and the proportions are unknown. Zinc is also listed and may compete with iron absorption.
Iron Chemical Form & Bioavailability
Ferrous fumarate is named, but another iron source and the proportions are unknown.
Absorption Support & Blocker Avoidance
Zinc is also listed and may compete with iron absorption.

Dose, Safety & Label Transparency100

The serving provides 18 mg of iron. The iron amount is stated, but the full source is unclear.
Elemental Iron Label Clarity
The iron amount is stated, but the full source is unclear.
Dosage Effectiveness & Safety Range
The serving provides 18 mg of iron.

Value100

The cost per serving is low.
Price per Effective Serving
The cost per serving is low.
Niacin · 24 mg OverallScore70
C- Active Ingredient Quality & BioavailabilityC+ Dose, Safety & Label TransparencyA+ Value
24 mg of niacin per serving comes at a low cost per serving. The main niacin entry gives no source; Other Ingredients lists niacinamide. Niacinamide lacks nicotinic acid’s specific lipid effects for the stated heart goal.
How this ingredient is rated

Active Ingredient Quality & Bioavailability57

Niacinamide is a standard source, but it lacks nicotinic acid’s specific lipid effects for the stated heart goal.
Niacin Form & Goal Alignment
Niacinamide lacks nicotinic acid’s specific lipid effects for the stated heart goal.
Precursor Source Quality
Niacinamide is a standard source without an advanced NAD+ claim.

Dose, Safety & Label Transparency67

The main niacin entry gives no source; Other Ingredients lists niacinamide. Niacinamide is a non-flushing form; no explicit no-flush claim is recorded.
Clarity of Chemical Form
The main niacin entry gives no source; Other Ingredients lists niacinamide.
Form-Specific Dosage Efficacy
The serving supplies 24 mg of niacin, below the range used for niacinamide in the supplied context.
Flush Risk & Safety Labeling
Niacinamide is a non-flushing form; no explicit no-flush claim is recorded.

Value100

The cost per serving is low.
Price Per Effective Serving
The cost per serving is low.
Report alternatives

Sources

Published studies used for the product analysis and the top-ranked studies for each ingredient and goal.

  1. Association of radioactive iodine treatment with survivorship symptoms and primary care utilisation in women of reproductive age with thyroid cancer: a retrospective cohort study.
    Devanarayan P; Hartman M; Partin M · Family medicine and community health · 2026
    Cohort study10,882 participantsEnergy forIodine
  2. Energy level and fatigue after surgery for thyroid cancer: A population-based study of patient-reported outcomes.
    Hughes DT; Reyes-Gastelum D; Kovatch KJ; Hamilton AS; Ward KC; Haymart MR · Surgery · 2020
    Cohort study2,584 participantsEnergy forIodine
  3. Health-Related Quality of Life in Differentiated Thyroid Cancer Survivors: A Cross-Sectional Study From Turkey.
    Gültekin A; Kahraman MY; Şengöz T; Şimşek FS · Head & neck · 2026
    Cross-sectional study202 participantsEnergy forIodine
  4. Large-dose intravenous ferric carboxymaltose injection for iron deficiency anemia in heavy uterine bleeding: a randomized, controlled trial.
    Van Wyck DB; Mangione A; Morrison J; Hadley PE; Jehle JA; Goodnough LT · Transfusion · 2010
    Randomized trial477 participantsEnergy forIron
  5. The Effect of Parenteral or Oral Iron Supplementation on Fatigue, Sleep, Quality of Life and Restless Legs Syndrome in Iron-Deficient Blood Donors: A Secondary Analysis of the IronWoMan RCT.
    Macher S; Herster C; Holter M; Moritz M; Matzhold EM; Stojakovic T; Pieber TR; Schlenke P; Drexler C; Amrein K · Nutrients · 2021
    Randomized trial176 participantsEnergy forIron
  6. Ferric carboxymaltose vs. oral iron in the treatment of pregnant women with iron deficiency anemia: an international, open-label, randomized controlled trial (FER-ASAP).
    Breymann C; Milman N; Mezzacasa A; Bernard R; Dudenhausen J; FER-ASAP investigators · Journal of perinatal medicine · 2018
    Randomized trial252 participantsEnergy forIron
  7. Effect of iron therapy on fatigue symptoms in non-anaemic iron deficient women of reproductive age- A Randomized Controlled Trial.
    Sultana N; Bajwa FA; Sikandar MZ; Haider MM; Majeed T · JPMA. The Journal of the Pakistan Medical Association · 2026
    Randomized trial164 participantsEnergy forIron
  8. Intravenous iron isomaltoside treatment of women suffering from severe fatigue after postpartum hemorrhage.
    Holm C; Thomsen LL; Langhoff-Roos J · The journal of maternal-fetal & neonatal medicine : the official journal of the European Association of Perinatal Medicine, the Federation of Asia and Oceania Perinatal Societies, the International Society of Perinatal Obstetricians · 2019
    Randomized trial85 participantsEnergy forIron
  9. Magnesium-L-threonate improves sleep quality and daytime functioning in adults with self-reported sleep problems: A randomized controlled trial.
    Hausenblas HA; Lynch T; Hooper S; Shrestha A; Rosendale D; Gu J · Sleep medicine: X · 2025
    Randomized trial80 participantsEnergy forMagnesium
  10. Total magnesium intake and risk of frailty in older women.
    Struijk EA; Fung TT; Bischoff-Ferrari HA; Willett WC; Lopez-Garcia E · Journal of cachexia, sarcopenia and muscle · 2024
    Cohort study81,524 participantsEnergy Fitness forMagnesium
  11. Red blood cell magnesium and chronic fatigue syndrome.
    Cox IM; Campbell MJ; Dowson D · Lancet (London, England) · 1991
    Randomized trial32 participantsEnergy forMagnesium
  12. Exercise, magnesium and immune function.
    Laires MJ; Monteiro C · Magnesium research · 2008
    Narrative reviewEnergy forMagnesium
  13. Physicochemical properties of and volatile compounds in riboflavin fortified cloudy apple juice; study of its effect on job fatigue among Egyptian construction workers.
    Fouad S; Ibrahim GE; Hussein AMS; Ibrahim FA; El Gendy A · Heliyon · 2021
    Non-randomized trialEnergy forRiboflavin
  14. Vitamin B status in patients with chronic fatigue syndrome.
    Heap LC; Peters TJ; Wessely S · Journal of the Royal Society of Medicine · 1999
    Case-control study30 participantsEnergy forRiboflavin
  15. B-vitamins, related vitamers, and metabolites in patients with quiescent inflammatory bowel disease and chronic fatigue treated with high dose oral thiamine.
    Bager P; Hvas CL; Hansen MM; Ueland P; Dahlerup JF · Molecular medicine (Cambridge, Mass.) · 2023
    Observational studyEnergy forRiboflavin
  16. Metabolic features of chronic fatigue syndrome.
    Naviaux RK; Naviaux JC; Li K; Bright AT; Alaynick WA; Wang L; Baxter A; Nathan N; Anderson W; Gordon E · Proceedings of the National Academy of Sciences of the United States of America · 2024
    Case-control study84 participantsEnergy forRiboflavin
  17. Effectiveness of Riboflavin in Inherited Metabolic Diseases: A Systematic Review
    Bregje Jaeger, Nina N Stolwijk, Femke Aaldering, Charlotte A Ruys, Marije Smits, Nicole I Wolf, Carla E M Hollak, Annet M Bosch · Journal of Inherited Metabolic Disease · 2026
    Systematic review381 studies pooledEnergy forRiboflavin
  18. Influence of thiamin supplementation on the health and general well-being of an elderly Irish population with marginal thiamin deficiency.
    Smidt LJ; Cremin FM; Grivetti LE; Clifford AJ · Journal of gerontology · 1991
    Randomized trial80 participantsEnergy forThiamin
  19. Randomised clinical trial: high-dose oral thiamine versus placebo for chronic fatigue in patients with quiescent inflammatory bowel disease.
    Bager P; Hvas CL; Rud CL; Dahlerup JF · Alimentary pharmacology & therapeutics · 2021
    Randomized trial40 participantsEnergy forThiamin
  20. Dietary reference values for thiamin.
    EFSA Panel on Dietetic Products, Nutrition and Allergies (NDA); Turck D; Bresson JL; Burlingame B; Dean T; Fairweather-Tait S; Heinonen M; Hirsch-Ernst KI; Mangelsdorf I; McArdle HJ; Naska A; Nowicka G; Pentieva K; Sanz Y; Siani A; Sjödin A; Stern M; Tomé D; Van Loveren H; Vinceti M; Willatts P; Lamberg-Allardt C; Przyrembel H; Tetens I; Gudelj Rakic J; Ioannidou S; de Sesmaisons-Lecarré A; Forss AC; Neuhäuser-Berthold M · EFSA journal. European Food Safety Authority · 2026
    Guideline / consensusEnergy forThiamin