Product Image

Iron 27 mg

21st Century
4.7
★ ★ ★ ★ ★
(8834 ratings)
Iron 27 mg
Product Image
Score80
A tablet that provides 27 mg of iron and is best matched to a demonstrated need. Form quality and supporting nutrients determine whether it stands out.
How scoring works
Quantity:110 Tablet(s) • (110 servings)
Goals:
Energy
Hair Health
Productivity Boost

Score 80

A tablet that provides 27 mg of iron and is best matched to a demonstrated need. Form quality and supporting nutrients determine whether it stands out.
How scoring works
$4.99($0.04 per serving)
iHerb
$ 4.99
Pure Formulas
$ 5.37
Walmart
$ 9.57
Amazon
$ 9.99
Report prices

Analysis

The 27 mg serving uses ferrous gluconate, a standard form that may be less gentle than chelated iron. It adds calcium but no vitamin C, folate, or vitamin B12.

Iron may support energy, concentration, and reduced shedding when low iron status is the underlying issue. It is not a general energy, productivity, or hair aid for people whose iron stores are already adequate.

Even a well-chosen iron form can cause nausea, constipation, or other digestive effects. The excellent serving value is useful, but need-based use matters more than low cost.

Who is it for
  • adults with a demonstrated need for 27 mg of supplemental iron
  • People whose diet or laboratory results indicate low iron
  • People who prefer a tablet
Best for
  • Focused iron supplementation
  • Need-based iron intake
  • Budget-conscious long-term supply

Pros

  • Clearly states 27 mg of iron
  • ferrous gluconate is explicitly identified
  • Very low serving cost

Cons

  • It adds calcium but no vitamin C, folate, or vitamin B12.
  • Does not address non-iron causes of fatigue or hair shedding
  • No broad pathway coverage beyond iron

Warnings

  • Use the 27 mg iron serving only when iron status or increased need supports supplementation.
  • Iron may still cause nausea, constipation, or stomach discomfort.
  • Keep the iron supplement securely away from children because accidental overdose can be dangerous.

Nutrient quality

74 High impact

Ferrous gluconate is an established form, but it is less gentle and less predictably absorbed than a premium chelate. The iron amount is substantial enough to matter when low iron is confirmed.

Ingredient transparency

82 Highest impact

Listed active ingredients have stated amounts, and no proprietary blend hides a combined total. Complete intake directions and inactive ingredients are not supplied, while the iron compound and supporting nutrient names are specific and understandable.

Customer satisfaction

75 High impact

The average rating is strong, and the review count is very large. No review text is supplied to assess recurring complaints or purpose-specific experience.

Value for money

89 Highest impact

The focused formula offers good quality for its low cost, although the iron form is not premium. The very low serving cost delivers a meaningful iron amount.

Report analysis

Goals

Energy
Impact
Highest effect
A Goal FitB+ Strength of SupportC CoverageA- Formula Quality
Iron · 27 mg

Ferrous gluconate supplies 27 mg of iron to support hemoglobin and oxygen transport when iron status is low. Correcting iron deficiency can meaningfully improve physical and mental energy.

Iron should be used for a demonstrated need because unnecessary supplementation can cause constipation and excess iron accumulation. The formula lacks vitamin C, folate, and vitamin B12 cofactors that could improve its energy-focused design.

Study evidence
Iron Supportive 74 studies
Hair Health
Impact
High effect
A- Goal FitB+ Strength of SupportF CoverageC Formula Quality
Iron · 27 mg

The iron amount may meaningfully reduce shedding when low ferritin or iron-deficiency anemia is the cause. Ferrous gluconate is a standard effective form, although the tablet lacks vitamin C, folate, and vitamin B12 support.

Hair benefit is narrow and depends on a documented iron need rather than general supplementation. The 27 mg iron dose can cause constipation, nausea, and harm from excess iron, so it is better matched to confirmed deficiency than casual hair use.

Study evidence
Iron Disputed 25 studies
Productivity Boost
Impact
High effect
B- Goal FitB+ Strength of SupportD CoverageC Formula Quality
Iron · 27 mg

Iron can improve energy and concentration when low iron is limiting oxygen delivery to the brain. It is not a general nootropic, so users with adequate iron are unlikely to gain a direct productivity boost.

The 27 mg amount is effective, but ferrous gluconate may be less gentle than chelated iron and calcium may compete with absorption. The serving may cause nausea or constipation and is unsuitable for people with iron-overload conditions such as hemochromatosis.

Study evidence
Iron Supportive 69 studies

Ingredients

IngredientAmount per serving
Calcium (Calcium Carbonate)
110 mg
Iron (Ferrous Gluconate)
27 mg
Gluten Free Adults 18–50
Report overview
D Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyA+ Value
Ferrous gluconate supplies an effective iron amount but may be less gentle than chelated forms. No vitamin C, folate, or vitamin B12 cofactors are included, while one tablet keeps use simple. The very low serving cost provides excellent value.
Loading alternative details
Report alternatives

Sources

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

  1. 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
  2. Clinical evaluation of iron treatment efficiency among non-anemic but iron-deficient female blood donors: a randomized controlled trial.
    Waldvogel S; Pedrazzini B; Vaucher P; Bize R; Cornuz J; Tissot JD; Favrat B · BMC medicine · 2012
    Randomized trial154 participantsEnergy forIron
  3. Intravenous iron for the treatment of fatigue in nonanemic, premenopausal women with low serum ferritin concentration.
    Krayenbuehl PA; Battegay E; Breymann C; Furrer J; Schulthess G · Blood · 2011
    Randomized trial90 participantsEnergy forIron
  4. Iron-deficiency anaemia and its effect on worker productivity and activity patterns.
    Edgerton VR; Gardner GW; Ohira Y; Gunawardena KA; Senewiratne B · British medical journal · 1980
    Non-randomized trialProductivity Boost forIron
  5. Consumption of Iron-Biofortified Beans Positively Affects Cognitive Performance in 18- to 27-Year-Old Rwandan Female College Students in an 18-Week Randomized Controlled Efficacy Trial.
    Murray-Kolb LE; Wenger MJ; Scott SP; Rhoten SE; Lung'aho MG; Haas JD · The Journal of nutrition · 2017
    Randomized trial150 participantsProductivity Boost forIron
  6. Iron Status, Anemia, and Iron Interventions and Their Associations with Cognitive and Academic Performance in Adolescents: A Systematic Review.
    Samson KLI; Fischer JAJ; Roche ML · Nutrients · 2022
    Systematic review50 studies pooledProductivity Boost forIron
  7. Iron status in diffuse telogen hair loss among women.
    Moeinvaziri M; Mansoori P; Holakooee K; Safaee Naraghi Z; Abbasi A · Acta dermatovenerologica Croatica : ADC · 2010
    Case-control study60 participantsHair Health forIron
  8. Scientific Opinion on the substantiation of a health claim related to iron and maintenance of normal hair growth pursuant to Article 13(5) of Regulation (EC) No 1924/2006.
    EFSA Panel on Dietetic Products, Nutrition and Allergies (NDA) · EFSA journal. European Food Safety Authority · 2026
    Guideline / consensusHair Health forIron
  9. Hair Loss After Metabolic and Bariatric Surgery: a Systematic Review and Meta-analysis.
    Zhang W; Fan M; Wang C; Mahawar K; Parmar C; Chen W; Yang W; Global Bariatric Research Collaborative · Obesity surgery · 2021
    Meta-analysis2,538 participants18 studies pooledHair Health forIron
  10. 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
  11. 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
  12. 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
  13. 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
  14. The Association Between Alopecia Areata and Iron Deficiency Anemia: A Large-Scale Population-Based Case-Control Study.
    Davidovici B; Drutin Y; Ben-Tov A; Mimouni D; Wohl Y · Journal of personalized medicine · 2026
    Case-control study100,203 participantsHair Health forIron
  15. Iron Deficiency and Nonscarring Alopecia in Women: Systematic Review and Meta-Analysis.
    Treister-Goltzman Y; Yarza S; Peleg R · Skin appendage disorders · 2022
    Meta-analysis10,029 participants36 studies pooledHair Health forIron
  16. Comparative Analysis of Postoperative Hair Loss and Micronutrient Deficiencies After One-Anastomosis Gastric Bypass Versus Sleeve Gastrectomy.
    Chinisaz F; Maleki T; Najjari K; Miratashi Yazdi SA · Obesity surgery · 2026
    Cohort study261 participantsHair Health forIron
  17. Assessment of Serum Ferritin Levels in Female Patients With Telogen Effluvium.
    Thamotharan N; Harikumar MV; Sundaram M; Swaminathan A; Rangarajan S · Cureus · 2026
    Cross-sectional study100 participantsHair Health forIron
  18. Diagnosis and treatment of female alopecia: Focusing on the iron deficiency-related alopecia.
    Lin CS; Chan LY; Wang JH; Chang CH · Tzu chi medical journal · 2023
    Cohort study155 participantsHair Health forIron
  19. Effects of daily iron supplementation in primary-school-aged children: systematic review and meta-analysis of randomized controlled trials.
    Low M; Farrell A; Biggs BA; Pasricha SR · CMAJ : Canadian Medical Association journal = journal de l'Association medicale canadienne · 2014
    Meta-analysis7,089 participants32 studies pooledProductivity Boost forIron
  20. Functional consequences of iron supplementation in iron-deficient female cotton mill workers in Beijing, China.
    Li R; Chen X; Yan H; Deurenberg P; Garby L; Hautvast JG · The American journal of clinical nutrition · 1994
    Randomized trial80 participantsProductivity Boost forIron
  21. The Effect of Iron-Fortified Lentils on Blood and Cognitive Status among Adolescent Girls in Bangladesh.
    Barnett AL; Wenger MJ; Yunus FM; Jalal C; DellaValle DM · Nutrients · 2023
    Randomized trial359 participantsProductivity Boost forIron
  22. Daily iron supplementation for improving anaemia, iron status and health in menstruating women.
    Low MS; Speedy J; Styles CE; De-Regil LM; Pasricha SR · The Cochrane database of systematic reviews · 2016
    Meta-analysis8,506 participants67 studies pooledProductivity Boost forIron