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Chelated Iron

Solgar
4.8
★ ★ ★ ★ ★
(19670 ratings)
Iron 25 mg
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Score88
A high-quality, good-value bisglycinate iron tablet that combines a practical dose with a generally well-tolerated form.
How scoring works
Quantity:100 Tablet(s) • (100 servings)
Goals:
Energy
Hair Health
Productivity Boost

Score 88

A high-quality, good-value bisglycinate iron tablet that combines a practical dose with a generally well-tolerated form.
How scoring works
$8.49($0.08 per serving)
Daily Vita
$ 9.90
Pure Formulas
$ 8.99
Vitacost
$ 9.23
iHerb
$ 8.49
Walmart
$ 12.99
Amazon
$ 18.03
Report prices

Analysis

Iron bisglycinate is the main strength, pairing a useful 25 mg amount with a chelated form often chosen for digestive tolerance. The single-active label makes the dose and purpose easy to understand.

The amount is suitable for meaningful supplementation when iron status is low. No vitamin C or broader blood-building nutrients are included, though the focused design may be preferable for someone who already covers those elsewhere.

A generous tablet supply and low serving cost make the formula attractive for monitored daily use. Its quality advantage does not remove the risk of taking iron without a demonstrated need.

Who is it for
  • Adults with confirmed low iron
  • People who prefer chelated iron for tolerance
Best for
  • Well-tolerated iron supplementation
  • Longer-term monitored use

Pros

  • 25 mg iron bisglycinate
  • Chelated form may be gentler
  • Transparent single-active formula
  • Excellent value

Cons

  • No vitamin C is included
  • Still may cause digestive symptoms
  • Does not provide folate or vitamin B12
  • Requires confirmation of iron need

Warnings

  • Use iron only for a demonstrated need because excess can accumulate, particularly in iron-overload disorders.
  • Iron can interfere with levothyroxine and tetracycline or quinolone antibiotics; follow appropriate dose spacing.
  • Keep iron tablets away from children because accidental ingestion is dangerous.

Nutrient quality

94 Highest impact

A favorable chelated form and meaningful dose provide strong core quality. Missing absorption and blood-forming cofactors are the main limitation.

Ingredient transparency

88 Highest impact

The active form and amount are clear without a proprietary blend. Missing full directions and non-active ingredients leave only modest disclosure gaps.

Customer satisfaction

73 High impact

The supplied average is very strong and supported by extensive response volume. No comment-level evidence is available to assess repeated complaints or alignment with the intended use.

Value for money

96 Highest impact

A favorable chelate, useful amount, and simple formula provide strong value. Lack of supporting cofactors is a modest trade-off rather than a major cost problem.

Report analysis

Goals

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

Iron bisglycinate is a well-absorbed chelated form, and the clearly stated amount is suitable when a genuine iron need has been identified. The single-tablet formula is focused and avoids lower-quality iron salts.

Iron is not a general-purpose supplement for everyone because unnecessary use can cause gastrointestinal effects and contribute to iron overload. People without confirmed deficiency or increased requirements should avoid routine use, and the tablets must be kept away from children because accidental overdose can be dangerous.

Study evidence
Iron Supportive 74 studies
Hair Health
Hair Health
Impact
Highest effect
B+ Goal FitA Strength of SupportD+ CoverageA Formula Quality
Iron · 25 mg

Correcting low iron stores can meaningfully reduce deficiency-related hair shedding. Iron does not support extra growth when ferritin and hemoglobin are already adequate.

Iron bisglycinate is a well-absorbed chelate that is often gentler than standard iron salts. The daily amount can cause stomach upset and should be used for a confirmed need because unnecessary iron may accumulate.

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

Iron bisglycinate may improve energy and concentration when iron deficiency is causing fatigue. It is not a suitable general productivity enhancer for people with adequate iron stores.

The 25 mg amount is meaningful and the chelated form supports absorption and tolerance. Unnecessary iron can cause digestive upset and may accumulate in people with iron-overload disorders.

Study evidence
Iron Supportive 69 studies

Ingredients

IngredientAmount per serving
Iron (Iron Bisglycinate)
 25 mg
Gluten Free Adults 18–50 Vegan Kosher Dairy Free Sugar Free Vegetarian
Report overview
Iron (Iron Bisglycinate) · 25 mg OverallScore89
B- Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyA+ Value

Iron bisglycinate offers a well-absorbed chelated form with an effective amount in one tablet. The formula does not include Vitamin C or blood-forming vitamin cofactors, so absorption support is limited to the chelate itself. Clear labeling and a low serving cost make it a strong practical choice.

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 serving cost is essentially equal, while the alternative 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 serving cost is essentially equal, while the alternative 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. 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. 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
  7. 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
  8. 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
  9. 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
  10. 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
  11. 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
  12. 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
  13. 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
  14. 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
  15. 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