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Gentle Iron 25 mg

4.8
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(47662 ratings)
Iron 25 mg
Product Image
Score86
Bisglycinate offers strong absorption and is commonly easier on the stomach than conventional salts. No vitamin C, folate, or vitamin B12 is included to support absorption or blood-cell formation.
How scoring works
Capsule
Quantity:90 Capsule(s) • (90 servings)
Goals:
Energy
Hair Health
Fitness
Productivity Boost

Score 86

Bisglycinate offers strong absorption and is commonly easier on the stomach than conventional salts. No vitamin C, folate, or vitamin B12 is included to support absorption or blood-cell formation.
How scoring works

Also available as

1 option
180 servings Iron 25 mg • 180 Capsule(s) • 180 servings $16.60 ($0.09 per serving)
$9.65($0.10 per serving)
Vitacost
$ 10.19
iHerb
$ 9.65
Daily Vita
$ 11.21
Amazon
$ 12.95
Report prices

Analysis

iron bisglycinate chelate supplies 25 mg of iron in one capsule. Bisglycinate offers strong absorption and is commonly easier on the stomach than conventional salts.

The serving may support energy, hair, and exercise capacity when low iron is confirmed. A low serving cost and focused one-capsule formula make it easy to sustain.

No vitamin C, folate, or vitamin B12 is included to support absorption or blood-cell formation. Iron status and the reason for supplementation should guide duration and dose.

Who is it for
  • Adults with a confirmed need for iron
  • People who prefer a gentle chelated form
  • Users seeking a low-cost single capsule
Best for
  • Focused iron supplementation
  • Sensitive stomachs
  • Routine use with monitoring

Pros

  • Well-absorbed bisglycinate chelate
  • Meaningful 25 mg iron amount
  • One-capsule serving
  • Very low serving cost

Cons

  • No vitamin C
  • No folate or vitamin B12
  • Focused formula requires supporting nutrients from diet or elsewhere

Warnings

  • The 25 mg amount may cause nausea, constipation, or dark stools.
  • Use iron for a confirmed need; unnecessary intake can accumulate, particularly in people with hemochromatosis or other iron-overload conditions.
  • Iron can reduce absorption of levothyroxine and some tetracycline or quinolone antibiotics, so separate doses as directed by a pharmacist.
  • Keep iron supplements away from children because accidental ingestion can cause serious iron poisoning.

Nutrient quality

89 Highest impact

A useful bisglycinate amount provides strong targeted iron quality. The substantial dose remains appropriate only when an iron need has been identified.

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Ingredient transparency

84 Highest impact

The iron form and amount are specific, with no hidden blend. Intake directions and non-active ingredients were not included in the supplied details.

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Customer satisfaction

73 High impact

The available satisfaction metric is favorable and the sample provides useful confidence. Specific experience details are absent, so repeated complaints and purpose fit remain uncertain.

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Value for money

96 Highest impact

Strong active quality and a very low serving cost provide excellent value. The focused formula is competitive without relying on weak extras.

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Report analysis

Goals

Energy
Energy
Impact
Highest effect
A Goal FitA+ Strength of SupportC+ CoverageA+ Formula Quality
Iron · 25 mg

Iron bisglycinate can support energy and stamina when low iron limits oxygen delivery. The premium chelate and 25 mg amount provide meaningful targeted support.

Iron does not improve energy in people who already have adequate stores and the formula covers no alertness or stress-resilience pathway. The 25 mg serving may cause stomach upset or constipation and is poorly suited to unsupervised use when iron status is normal.

Study evidence
Iron Supportive 74 studies
Hair Health
Hair Health
Impact
Highest effect
A- Goal FitA Strength of SupportC- CoverageA- Formula Quality
Iron · 25 mg

Chelated iron can strongly support hair when low iron stores contribute to shedding. Iron bisglycinate provides a well-absorbed and generally gentle form at a clearly disclosed amount.

The formula is highly focused but does not include vitamin C or other nutrients that could support absorption and broader follicle health. Because unnecessary iron can accumulate and cause digestive effects, the dose is most appropriate when an iron need has been identified.

Study evidence
Iron Disputed 25 studies
Fitness
Fitness
Impact
Highest effect
A- Goal FitA+ Strength of SupportD CoverageA+ Formula Quality

Iron can preserve endurance and work capacity when low status limits hemoglobin and oxygen delivery. The disclosed amount uses a highly absorbable bisglycinate form in a convenient capsule.

Iron does not improve fitness performance in athletes with adequate status and can be harmful when unnecessary. The capsules must be stored securely because accidental iron ingestion can cause severe poisoning in children.

Study evidence
Iron Supportive 81 studies
Productivity Boost
Productivity Boost
Impact
High effect
B- Goal FitA Strength of SupportD+ CoverageA+ Formula Quality
Iron · 25 mg

Iron can improve energy and mental clarity when low iron status is causing fatigue, but it is not a general productivity enhancer. Evidence is strong for correcting deficiency and weak for use in people whose iron status is already adequate.

The bisglycinate chelate is well absorbed and the amount is appropriate for targeted supplementation. Unnecessary iron can accumulate or cause digestive effects, so regular use should be guided by a demonstrated need.

Study evidence
Iron Supportive 69 studies

Ingredients

IngredientAmount per serving
Iron (Iron Bisglycinate Chelate)
 25 mg
Gluten Free Adults 18–50 Vegan Kosher Dairy Free Sugar Free Halal Vegetarian
Report overview
Iron (Iron Bisglycinate Chelate) · 25 mg OverallScore91
B Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyA+ Value

Iron bisglycinate chelate supplies a gentle, highly absorbable form at an effective 25 mg dose. The one-capsule serving is simple, although no vitamin C or supportive B vitamins are included. Very low serving cost makes it an economical focused iron option.

View ingredientView products
Loading alternative details
85 Performance

Iron Complex

Advanced Nutrition by Zahler
Ferrochel iron is paired with vitamin C, methylcobalamin, folic acid, and histidine, giving broader disclosed support for energy and hair goals. Its iron amount stays close to the original’s 25 mg. The added nutrients make it less minimal than a single-ingredient iron product.
87 Performance

Vegan True Iron Support

Source Naturals
Ferrochel bisglycinate iron is combined with vitamin C, folic acid, and vitamin B12, with strong iron and energy alignment. Its iron amount stays close to the original’s 25 mg. Cyanocobalamin and folic acid are clearly listed, although other forms may be preferred by some users.
86 Performance

Chelated Iron 18 mg

Bluebonnet
The concise formula uses a clearly identified ferrous bisglycinate chelate and avoids unrelated active ingredients. Its iron amount is lower than the original’s 25 mg. The simpler amount may suit users who do not need a higher-dose or multi-ingredient formula.
77 Budget

Iron 65 mg

Nature Made
The lower serving cost provides a clearly identified ferrous sulfate form. Its iron amount is higher than the original’s 25 mg. The single-active formula keeps the formula similarly focused on iron.
85 Budget

Iron 25 mg

Source Naturals
The lower serving cost provides iron as an explicitly named amino acid chelate. Its iron amount stays close to the original’s 25 mg. The single-active formula keeps the formula similarly focused on iron.
85 Budget

Iron Ferrochel Ferrous Bisglycinate Chelate 36 mg

California Gold Nutrition
The lower serving cost provides iron as a clearly identified Ferrochel ferrous bisglycinate chelate. Its iron amount is higher than the original’s 25 mg. The single-active formula keeps the formula similarly focused on iron.
86 Value

High Absorption Iron with Ferrochel 27 mg

Doctor's Best
The lower serving cost provides a focused Ferrochel iron formula with favorable iron and hair-goal alignment. Its iron amount stays close to the original’s 25 mg. The single-active formula keeps the formula similarly focused on iron.
80 Value

Iron 27 mg

21st Century
The lower serving cost provides ferrous gluconate iron with a disclosed calcium amount. Its iron amount stays close to the original’s 25 mg. The added calcium makes it less minimal than a single-ingredient iron option.
78 Value

Prenatal Multivitamin/Multimineral with Folate

Spring Valley
The lower serving cost provides iron alongside folate, vitamin C, vitamin D3, zinc, and other prenatal nutrients. Its iron amount stays close to the original’s 25 mg. The iron form is not supplied, and the prenatal focus may be unnecessary for someone seeking iron alone.
Report alternatives

Sources

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

  1. Does Iron Supplementation Improve Performance in Iron-Deficient Nonanemic Athletes?
    Rubeor A; Goojha C; Manning J; White J · Sports health · 2018
    Systematic review283 participants12 studies pooledFitness 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. Iron plays a certain role in patterned hair loss.
    Park SY; Na SY; Kim JH; Cho S; Lee JH · Journal of Korean medical science · 2014
    Case-control study420 participantsHair Health forIron
  4. Intravenous iron versus blood transfusion for postpartum anemia: a systematic review and meta-analysis.
    Caljé E; Groom KM; Dixon L; Marriott J; Foon R; Oyston C; Bloomfield FH; Jordan V · Systematic reviews · 2024
    Meta-analysis4,196 participantsEnergy forIron
  5. Effect of iron injections on aerobic-exercise performance of iron-depleted female athletes.
    Peeling P; Blee T; Goodman C; Dawson B; Claydon G; Beilby J; Prins A · International journal of sport nutrition and exercise metabolism · 2007
    Randomized trial16 participantsFitness forIron
  6. 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
  7. Iron deficiency, general health and fatigue: results from the Australian Longitudinal Study on Women's Health.
    Patterson AJ; Brown WJ; Powers JR; Roberts DC · Quality of life research : an international journal of quality of life aspects of treatment, care and rehabilitation · 2001
    Cohort studyEnergy forIron
  8. Iron deficiency and reduced work capacity: a critical review of the research to determine a causal relationship.
    Haas JD; Brownlie T · The Journal of nutrition · 2001
    Systematic review29 studies pooledFitness forIron
  9. A Hospital-based Study to Determine Causes of Diffuse Hair Loss in Women.
    Malkud S · Journal of clinical and diagnostic research : JCDR · 2015
    Observational study180 participantsHair 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. Marginal iron deficiency without anemia impairs aerobic adaptation among previously untrained women.
    Brownlie T; Utermohlen V; Hinton PS; Giordano C; Haas JD · The American journal of clinical nutrition · 2002
    Randomized trial41 participantsFitness forIron
  12. 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
  13. 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
  14. Randomized, double-blind, placebo-controlled trial of iron supplementation in female soldiers during military training: effects on iron status, physical performance, and mood.
    McClung JP; Karl JP; Cable SJ; Williams KW; Nindl BC; Young AJ; Lieberman HR · The American journal of clinical nutrition · 2009
    Randomized trial219 participantsFitness forIron
  15. Low iron stores: a risk factor for excessive hair loss in non-menopausal women.
    Deloche C; Bastien P; Chadoutaud S; Galan P; Bertrais S; Hercberg S; de Lacharrière O · European journal of dermatology : EJD · 2008
    Cross-sectional study5,110 participantsHair Health forIron
  16. Altered metabolic response of iron-depleted nonanemic women during a 15-km time trial.
    Zhu YI; Haas JD · Journal of applied physiology (Bethesda, Md. : 1985) · 1998
    Randomized trial37 participantsFitness forIron
  17. Maternal Fatigue after Postpartum Anemia Treatment with Intravenous Ferric Carboxymaltose vs. Intravenous Ferric Derisomaltose vs. Oral Ferrous Sulphate: A Randomized Controlled Trial.
    Bombač Tavčar L; Hrobat H; Gornik L; Preložnik Zupan I; Vidmar Šimic M; Pečlin P; Kavšek G; Lučovnik M · Journal of clinical medicine · 2024
    Randomized trial300 participantsEnergy forIron
  18. Retrospective Review of 2851 Female Patients With Telogen Effluvium: A Single-Center Experience.
    Karakoyun Ö; Ayhan E; Yıldız İ · Journal of cosmetic dermatology · 2025
    Cohort study2,851 participantsHair Health forIron
  19. Effects of Oral Iron Supplementation on Blood Iron Status in Athletes: A Systematic Review, Meta-Analysis and Meta-Regression of Randomized Controlled Trials.
    Šmid AN; Golja P; Hadžić V; Abazović E; Drole K; Paravlic AH · Sports medicine (Auckland, N.Z.) · 2024
    Meta-analysis449 participants13 studies pooledFitness forIron
  20. 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
  21. 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
  22. Increasing Iron Status through Dietary Supplementation in Iron-Depleted, Sedentary Women Increases Endurance Performance at Both Near-Maximal and Submaximal Exercise Intensities.
    Pompano LM; Haas JD · The Journal of nutrition · 2019
    Randomized trial73 participantsFitness forIron
  23. Hypophosphatemia attenuates improvements in vitality after intravenous iron treatment in patients with inflammatory bowel disease.
    Bjorner JB; Kennedy N; Lindgren S; Pollock RF · Quality of life research : an international journal of quality of life aspects of treatment, care and rehabilitation · 2024
    Randomized trial97 participantsEnergy forIron
  24. 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
  25. Iron supplementation improves endurance after training in iron-depleted, nonanemic women.
    Hinton PS; Giordano C; Brownlie T; Haas JD · Journal of applied physiology (Bethesda, Md. : 1985) · 2000
    Randomized trial42 participantsFitness forIron
  26. 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
  27. 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
  28. 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
  29. Effect of Intravenous Iron on Aerobic Capacity and Iron Metabolism in Elite Athletes.
    Burden RJ; Pollock N; Whyte GP; Richards T; Moore B; Busbridge M; Srai SK; Otto J; Pedlar CR · Medicine and science in sports and exercise · 2016
    Randomized trial15 participantsFitness forIron
  30. Alopecia Areata Different View; Heavy Metals.
    Ozaydin-Yavuz G; Yavuz IH; Demir H; Demir C; Bilgili SG · Indian journal of dermatology · 2024
    Case-control study61 participantsHair Health forIron
  31. 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
  32. Ferric carboxymaltose in patients with heart failure and iron deficiency.
    Anker SD; Comin Colet J; Filippatos G; Willenheimer R; Dickstein K; Drexler H; Lüscher TF; Bart B; Banasiak W; Niegowska J; Kirwan BA; Mori C; von Eisenhart Rothe B; Pocock SJ; Poole-Wilson PA; Ponikowski P; FAIR-HF Trial Investigators · The New England journal of medicine · 2010
    Randomized trial459 participantsFitness forIron
  33. Ferric Carboxymaltose Versus Ferrous Fumarate in Anemic Children with Inflammatory Bowel Disease: The POPEYE Randomized Controlled Clinical Trial.
    Bevers N; Van de Vijver E; Aliu A; Rezazadeh Ardabili A; Rosias P; Stapelbroek J; Bertrams Maartens IA; van de Feen C; Escher H; Oudshoorn A; Teklenburg S; Vande Velde S; Winkens B; Raijmakers M; Vreugdenhil A; Pierik MJ; van Rheenen PF · The Journal of pediatrics · 2023
    Randomized trial64 participantsFitness forIron
  34. 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 pooledFitness Productivity Boost forIron
  35. 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
  36. 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
  37. 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
  38. 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
  39. 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
  40. 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
  41. 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