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Iron Complex

Advanced Nutrition by Zahler
4.8
★ ★ ★ ★ ★
(10836 ratings)
Iron 25 mg
Histidine 100 mg
Folate 400 mcg
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Score85
A focused, well-constructed iron formula with useful cofactors, best reserved for people with a confirmed need.
How scoring works
Quantity:100 Capsule(s) • (100 servings)
Goals:
Hair Health
Energy
General Health
Productivity Boost

Score 85

A focused, well-constructed iron formula with useful cofactors, best reserved for people with a confirmed need.
How scoring works
$16.22($0.16 per serving)
Pure Formulas
$ 16.22
iHerb
$ 16.22
Amazon
$ 16.22
Vitacost
$ 17.85
Report prices

Analysis

Chelated iron is paired with vitamin C, methylcobalamin, folate, and histidine in a focused formula. These supporting nutrients make the product more coherent than a basic iron-only capsule.

The iron amount is substantial and best suited to a demonstrated need rather than casual wellness use. The single-capsule serving and clear amounts make dosing straightforward.

It fits adults whose iron status or life stage calls for supplementation. People without increased needs gain little from routine use and take on avoidable iron-excess risk.

Who is it for
  • Adults with confirmed low iron status
  • People advised to use a substantial iron supplement
Best for
  • Focused iron replenishment
  • Users wanting iron with vitamin C and B vitamins

Pros

  • Uses chelated Ferrochel iron
  • Includes vitamin C and methylcobalamin
  • Convenient one-capsule serving

Cons

  • Not appropriate as a general wellness supplement
  • Contains folic acid rather than methylfolate
  • Iron can cause digestive discomfort

Warnings

  • Iron can cause constipation, nausea, or stomach pain, especially when taken without food.
  • People with iron-overload conditions should not use supplemental iron unless specifically directed.
  • Keep iron away from children because accidental overdose can be dangerous.

Nutrient quality

87 Highest impact

Chelated iron is paired with vitamin C and supportive B vitamins in a coherent absorption-focused design. The iron amount is effective for deficiency support but too assertive for casual supplementation without a clear need.

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Ingredient transparency

84 Highest impact

Every active amount and key form is clearly identified, but capsule excipients are not supplied. Complete non-active ingredient details are not included in the supplied label data.

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Customer satisfaction

72 High impact

The supplied average rating is favorable. Detailed firsthand feedback is unavailable, so recurring complaints and purpose fit cannot be assessed.

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Value for money

95 Highest impact

A high-quality chelated iron formula is offered at a favorable serving cost. The focused design directs nearly all value toward useful core ingredients.

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Report analysis

Goals

Hair Health
Hair Health
Impact
Highest effect
A+ Goal FitA+ Strength of SupportB CoverageA+ Formula Quality
Iron · 25 mgVitamin C · 60 mg

Ferrochel iron directly addresses low-ferritin shedding, while vitamin C, folate, and methylcobalamin support absorption and red blood cell formation. Hair benefits are most likely when iron or related nutrient deficiency is confirmed.

The chelated form and elemental amount are clearly disclosed in a focused one-capsule serving. Folic acid is less direct than methylfolate, but the broader cofactor design remains strong and avoids unrelated beauty ingredients.

Study evidence
Folate Mixed 15 studies
Iron Disputed 25 studies
Vitamin C Mixed 5 studies
Energy
Energy
Impact
Highest effect
A Goal FitA+ Strength of SupportB CoverageA+ Formula Quality
Vitamin B12 · 80 mcgIron · 25 mg

Chelated iron with vitamin C, methylcobalamin, folate, and histidine forms a well-designed formula for deficiency-related fatigue. The iron amount is effective and every cofactor is disclosed.

Benefits depend on low iron status rather than acting as a general stimulant. People without a demonstrated need for iron should avoid unnecessary long-term use because excess iron can be harmful.

Study evidence
Iron Supportive 74 studies
General Health
General Health
Impact
High effect
B Goal FitB+ Strength of SupportB- CoverageA Formula Quality
Folate · 400 mcgVitamin B12 · 80 mcgVitamin C · 60 mg

Iron, vitamin C, methylcobalamin, folate, and histidine form a coherent blood-building nutrient combination. The iron and supporting vitamin amounts are clearly disclosed and meaningful.

Iron at this amount is not appropriate as a routine general-health supplement for people without a demonstrated need. Unnecessary use may cause digestive effects and can contribute to excess iron intake.

Study evidence
Folate Supportive 80 studies
Vitamin C Supportive 56 studies
Productivity Boost
Productivity Boost
Impact
High effect
C+ Goal FitA- Strength of SupportC CoverageA Formula Quality
Iron · 25 mgVitamin B12 · 80 mcgVitamin B12 · 80 mcg

Chelated iron may restore energy and concentration when low iron is the cause of fatigue. Vitamin C, methylcobalamin, and folate provide useful absorption and blood-building support.

The 25 mg Ferrochel amount is meaningful and clearly disclosed in a single capsule. Iron can be harmful in iron-overload conditions and should not be treated as a general productivity stimulant.

Study evidence
Iron Supportive 69 studies

Ingredients

IngredientAmount per serving
Vitamin C (Ascorbic Acid)
 60 mg
Vitamin B12 (Methylcobalamin)
 80 mcg
Folic Acid
400 mcg
Ferrochel (Iron)
 25 mg
L-Histidine (L-Histidine Hydrochloride)
 100 mg
Gluten Free Adults 18–50 Kosher Dairy Free
Report overview
Iron · 25 mg OverallScore94
A+ Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyB+ Value

A premium chelated iron form provides a useful dose that appears well suited to focused iron supplementation. Vitamin C, folate, and vitamin B12 add meaningful absorption and red-blood-cell support. The single-capsule serving and favorable value make regular use practical.

View ingredientView products
Histidine (L-Histidine Hydrochloride) · 100 mg OverallScore58
C- Active Ingredient Quality & BioavailabilityC+ Dose, Safety & Label TransparencyD+ Value

L-histidine hydrochloride is a stable, soluble form, though it supplies less active histidine by weight than the free base. The disclosed amount is modest and better suited to a combination formula than targeted histidine support. Clear labeling and a low serving cost produce reasonable histidine-specific value despite the absence of stated purity certification.

View ingredientView products
Folate · 400 mcg OverallScore46
F Active Ingredient Quality & BioavailabilityB Dose, Safety & Label TransparencyD+ Value

The folate dose is adequate, but synthetic folic acid is less direct for the body to use than active methylfolate. A substantial amount of methylcobalamin provides strong vitamin B12 support and lowers the concern of masking deficiency. Dietary folate equivalents are not disclosed, while the serving cost is close to the efficient range for basic folic acid.

View ingredientView products
Loading alternative details
87 Performance

Vegan True Iron Support

Source Naturals
<p>Iron bisglycinate, vitamin C, folate, and vitamin B12 create a focused iron-support formula. Compared with Iron Complex, its focused iron-bisglycinate design may address the original’s basic folic acid form while preserving iron support more directly, although folic acid and cyanocobalamin are basic forms and iron still requires a demonstrated need.</p>
70 Performance

Blood Nourish-R

LifeSeasons
<p>Ferrous bisglycinate, methylcobalamin, calcium folinate, and thiamine form a high-quality blood-support core. Compared with Iron Complex, its active folate, methylcobalamin, and chelated iron may address the original’s basic folic acid form while preserving iron support more directly, although the iron amount is very high and should be reserved for a confirmed need.</p>
75 Performance

Kids Vitamins & Minerals Chewable Natural Black Cherry Flavor

Solaray
<p>A broad child-focused vitamin and mineral panel includes vitamin C, folate, and iron. Compared with Iron Complex, its wider micronutrient coverage may address the original’s basic folic acid form while preserving iron support more directly, although ferrous sulfate and folic acid are basic forms and accidental excess iron is dangerous for children.</p>
75 Budget

Flintstones Complete

Bayer
<p>Broad vitamins and minerals provide basic child-focused nutrition in a simple chewable. Its lower recurring cost than Iron Complex supports this category, although many nutrient forms are not identified and the amounts are child-oriented.</p>
78 Budget

Children's Chewable

Thompson
<p>Vitamin D3, natural-form vitamin E, iron fumarate, and broad vitamins create a practical children’s formula. Its lower recurring cost than Iron Complex supports this category, although the dose is child-specific and several structural minerals are light.</p>
78 Budget

Ultra Prenatal Vitamins & Minerals + DHA

Nature's Truth
<p>Meaningful iron, folate, and DHA are combined in a long-supply prenatal softgel. Its lower recurring cost than Iron Complex supports this category, although the nutrient forms are conventional and iodine and choline are absent.</p>
78 Value

Ultra Prenatal Vitamins & Minerals + DHA

Nature's Truth
<p>Iron, folate, and DHA provide a concise prenatal foundation with favorable serving value. Compared with Iron Complex, its combination of iron, folate, and DHA may justify some of the higher recurring cost, although the nutrient forms are conventional and iodine and choline are absent.</p>
70 Value

Mega-Kid Berry

Source Naturals
<p>Natural-form vitamin E, methylcobalamin, iron fumarate, and broad vitamins support a child-focused formula. Compared with Iron Complex, its broad vitamin coverage and named iron form may justify some of the higher recurring cost, although many tiny food additions add little depth and bee pollen creates an allergy concern.</p>
55 Value

Enzyme Nutrition Multi-Vitamin Two Daily

Enzymedica
<p>Natural mixed vitamin E, vitamin D3, beta-carotene, folate, and a small iron amount provide broad coverage. Compared with Iron Complex, its broad multivitamin base may justify some of the higher recurring cost, although several signature ingredients have no measurable amount and the iron contribution is modest.</p>
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Sources

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

  1. 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
  2. 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
  3. 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
  4. 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
  5. 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
  6. Intakes of Folate, Vitamin B6, and Vitamin B12 in Relation to All-Cause and Cause-Specific Mortality: A National Population-Based Cohort.
    Bo Y; Xu H; Zhang H; Zhang J; Wan Z; Zhao X; Yu Z · Nutrients · 2022
    Cohort study55,569 participantsGeneral Health forFolate
  7. The responsiveness of plasma homocysteine to small increases in dietary folic acid: a primary care study.
    Schorah CJ; Devitt H; Lucock M; Dowell AC · European journal of clinical nutrition · 1998
    Randomized trial119 participantsGeneral Health forFolate
  8. Associations of Serum Folate and Homocysteine Concentrations with All-Cause, Cardiovascular Disease, and Cancer Mortality in Men and Women in Korea: the Cardiovascular Disease Association Study.
    Song S; Song BM; Park HY · The Journal of nutrition · 2023
    Cohort study21,260 participantsGeneral Health forFolate
  9. The concept of folic acid supplementation and its role in prevention of neural tube defect among pregnant women: PRISMA.
    Seyoum Tola F · Medicine · 2024
    Systematic reviewGeneral Health forFolate
  10. Systematic review of adverse health outcomes associated with high serum or red blood cell folate concentrations.
    Colapinto CK; O'Connor DL; Sampson M; Williams B; Tremblay MS · Journal of public health (Oxford, England) · 2017
    Systematic review71,847 participants46 studies pooledGeneral Health forFolate
  11. Dietary intake and blood concentrations of antioxidants and the risk of cardiovascular disease, total cancer, and all-cause mortality: a systematic review and dose-response meta-analysis of prospective studies.
    Aune D; Keum N; Giovannucci E; Fadnes LT; Boffetta P; Greenwood DC; Tonstad S; Vatten LJ; Riboli E; Norat T · The American journal of clinical nutrition · 2019
    Meta-analysis69 studies pooledGeneral Health forVitamin C
  12. Scientific Opinion on the substantiation of a health claim related to vitamin C and increasing non haem iron absorption pursuant to Article 14 of Regulation (EC) No 1924/2006.
    EFSA Panel on Dietetic Products, Nutrition and Allergies (NDA) · EFSA journal. European Food Safety Authority · 2026
    Guideline / consensusGeneral Health forVitamin C
  13. Vitamin C Depletion and All-Cause Mortality in Renal Transplant Recipients.
    Sotomayor CG; Eisenga MF; Gomes Neto AW; Ozyilmaz A; Gans ROB; Jong WHA; Zelle DM; Berger SP; Gaillard CAJM; Navis GJ; Bakker SJ · Nutrients · 2018
    Cohort study598 participantsGeneral Health forVitamin C
  14. Associations of Serum Biomarkers of Fruit and Vegetable Intake With the Risk of Cause-Specific Mortality and All-Cause Mortality: A National Prospective Cohort Study.
    Pu L; Zhang R; Wang X; Zhao T; Sun H; Han L · Frontiers in nutrition · 2022
    Cohort study12,530 participantsGeneral Health forVitamin C
  15. Relation between plasma ascorbic acid and mortality in men and women in EPIC-Norfolk prospective study: a prospective population study. European Prospective Investigation into Cancer and Nutrition.
    Khaw KT; Bingham S; Welch A; Luben R; Wareham N; Oakes S; Day N · Lancet (London, England) · 2001
    Cohort study19,496 participantsGeneral Health forVitamin C
  16. 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 forFolate
  17. Quantitative Analysis of Selected Circulating Hematological Biomarkers, Essential Minerals, Vitamins, and Thyroid Hormones in Females Affected by Hair Loss.
    Al-Fawaeir S; Al-Odat I · Diseases (Basel, Switzerland) · 2025
    Case-control study200 participantsHair Health forFolate
  18. Twelve weeks of protracted venous infusion of fluorouracil (5-FU) is as effective as 6 months of bolus 5-FU and folinic acid as adjuvant treatment in colorectal cancer.
    Saini A; Norman AR; Cunningham D; Chau I; Hill M; Tait D; Hickish T; Iveson T; Lofts F; Jodrell D; Ross PJ; Oates J · British journal of cancer · 2003
    Randomized trialHair Health forFolate
  19. Role of oxaliplatin combined with 5-fluorouracil and folinic acid in the first- and second-line treatment of advanced colorectal cancer.
    Jonker D; Rumble RB; Maroun J; Gastrointestinal Cancer Disease Site Groupof Cancer Care Ontario’s Program in Evidence-Based Care · Current oncology (Toronto, Ont.) · 2012
    Randomized trialHair Health forFolate
  20. Phase I-II study of vinorelbine in combination with 5-fluorouracil and folinic acid as first-line chemotherapy in metastatic breast cancer: a regimen with a low subjective toxic burden.
    Nolè F; de Braud F; Aapro M; Minchella I; De Pas TM; Zampino MG; Monti S; Andreoni G; Goldhirsch A · Annals of oncology : official journal of the European Society for Medical Oncology · 1997
    Randomized trialHair Health forFolate
  21. 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
  22. 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
  23. 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
  24. 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
  25. 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
  26. Management of hair loss associated with endocrine therapy in patients with breast cancer: an overview.
    Karatas F; Sahin S; Sever AR; Altundag K · SpringerPlus · 2016
    Narrative reviewHair Health forVitamin C
  27. Elucidating causal relationships of diet-derived circulating antioxidants and the risk of non-scarring alopecia: A Mendelian randomization study.
    Ba Y; Shen L; Peng X; Zhang Y; Wang J · Medicine · 2024
    Methods validation study201,019 participantsHair Health forVitamin C
  28. Alterations of plasma antioxidants and mitochondrial DNA mutation in hair follicles of smokers.
    Liu CS; Chen HW; Lii CK; Tsai CS; Kuo CL; Wei YH · Environmental and molecular mutagenesis · 2002
    Observational studyHair Health forVitamin C
  29. Removal of synthetic hair dye using formamidine sulfinic acid and other sulfinate precursors.
    Hawkes JA; Lewis DM; Mama J; Murray J · International journal of cosmetic science · 2026
    Methods validation studyHair Health forVitamin C
  30. A Zinc Sulphate-Resistant Acrodermatitis Enteropathica Patient with a Novel Mutation in SLC39A4 Gene.
    Kilic M; Taskesen M; Coskun T; Gürakan F; Tokatli A; Sivri HS; Dursun A; Schmitt S; Küry S · JIMD reports · 2013
    Case reportHair Health forVitamin C
  31. 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
  32. 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
  33. 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
  34. 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
  35. 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