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Hair Skin & Nails

21st Century
4.6
★ ★ ★ ★ ★
(30432 ratings)
Iodine 150 mcg
PABA 10 mg
Phosphorus 58 mg
Iron 3.3 mg
Choline 25 mg
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Score57

A crowded beauty multivitamin with useful iodine but mostly small hair-focused doses. The opaque herbal blend and token amounts reduce confidence in meaningful hair support.

How scoring works
Quantity:50 Tablet(s) • (50 servings)
Goals:
Energy

Score 57

A crowded beauty multivitamin with useful iodine but mostly small hair-focused doses. The opaque herbal blend and token amounts reduce confidence in meaningful hair support.

How scoring works
$7.49($0.14 per serving)
Pure Formulas
$ 7.94
iHerb
$ 7.49
iHerb
$ 7.49
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Analysis

The tablet combines vitamins A, C, E, several B vitamins, iodine, calcium, iron, magnesium, phosphorus, and other trace nutrients. Potassium iodide supplies a clearly stated 150 mcg iodine amount, which is the strongest targeted component.

Hair-focused nutrients are mostly token additions, including 25 mcg biotin, 0.6 mg zinc, 3.3 mg iron, 3.5 mg cysteine, and 7.2 mg tyrosine. Magnesium oxide is a basic form, while the 310 mg herbal blend does not disclose its individual ingredients or amounts.

A one-tablet serving and broad label may suit people wanting inexpensive general coverage. The formula is a weak choice for targeted hair support because it spreads the serving across many low-dose ingredients rather than building depth in the main pathways.

Who is it for
  • Adults wanting a broad beauty-oriented multivitamin
  • People seeking a one-tablet serving
  • Users who specifically want potassium iodide included
Best for
  • Basic micronutrient coverage
  • Daily iodine intake
  • General rather than targeted beauty support

Pros

  • Broad vitamin and mineral profile
  • Clearly disclosed 150 mcg iodine amount
  • One-tablet serving
  • Includes vitamin C and several B vitamins

Cons

  • Hair-focused ingredients are mostly underdosed
  • Herbal blend lacks individual amounts
  • Uses magnesium oxide
  • Choline and iron amounts are too low for targeted use
  • Crowded formula includes several token additions

Warnings

  • Contains soy protein and is unsuitable for people with a soy allergy
  • People with thyroid conditions or thyroid-medication changes should discuss the 150 mcg iodine amount with a clinician
  • Pregnant users should account for the 750 mcg RAE preformed vitamin A before combining it with other supplements
  • The proprietary herbal blend makes allergy and interaction screening difficult

Nutrient quality

49 Lower impact

A few vitamins, iodine, cysteine, and protein have plausible roles in hair support. Low biotin, zinc, vitamin D, amino acid, and choline amounts combine with basic forms and many low-value extras.

Ingredient transparency

53 Moderate impact

Most named nutrients have stated amounts and the single-tablet supply is clear. A proprietary herbal blend hides its components, while duplicate nutrient entries and missing non-active ingredients reduce clarity.

Customer satisfaction

72 High impact

The average rating is strong and backed by a very large review count. No detailed reviews are supplied to identify recurring complaints or hair-related experiences.

Value for money

58 Moderate impact

A long supply and broad label create accessible entry-level value. Weak doses, ordinary forms, and many low-value extras substantially reduce effective value.

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Goals

Energy
Impact
Moderate effect
C+ Goal FitC- Strength of SupportD+ CoverageF Formula Quality
Iodine · 150 mcgVitamin D · 1.2 mcgVitamin B5 · 15 mgMagnesium · 20 mgRiboflavin · 5 mgThiamin · 5 mgVitamin B12 · 25 mcgIron · 3.3 mgPotassium · 5 mg

Iodine and several B vitamins support thyroid function and normal fuel metabolism. The iodine amount is well aligned with daily nutrition, but many other energy-related ingredients are modest or weakly absorbed.

A crowded hair-focused formula includes a proprietary herbal blend and several tiny add-ons that cannot be judged individually. Standard vitamin forms, magnesium oxide, and token tyrosine limit its usefulness for noticeable energy support.

Study evidence
Iodine Adverse 3 studies
Magnesium Supportive 4 studies
Potassium Supportive 2 studies

Ingredients

IngredientAmount per serving
Vitamin A (Vitamin A Palmitate)
750 mcg RAE
Vitamin C (Ascorbic Acid)
50 mg
Vitamin D3 (Cholecalciferol)
1.2 mcg
Vitamin E (DL-Alpha-Tocopheryl Acetate)
25 mg
Thiamine (Thiamine Mononitrate, Vitamin B1)
5 mg
Riboflavin (Vitamin B2)
5 mg
Niacin
7.5 mg
Vitamin B6 (Pyridoxine Hydrochloride)
6.5 mg
Folate
42 mcg DFE
Vitamin B12 (Cyanocobalamin)
25 mcg
Biotin
25 mcg
Pantothenic Acid (D-Calcium Pantothenate)
15 mg
Choline (Choline Bitartrate)
25 mg
Calcium (Calcium Carbonate, Dicalcium Phosphate)
125 mg
Iron (Ferrous Fumarate)
3.3 mg
Phosphorus (Dicalcium Phosphate)
58 mg
Iodine (Potassium Iodide)
150 mcg
Magnesium (Magnesium Oxide)
20 mg
Zinc (Zinc Gluconate)
0.6 mg
Manganese (Manganese Sulfate)
0.6 mg
Potassium (Potassium Iodide, Potassium Sulfate)
5 mg
Betaine HCl
10 mg
Inositol
10 mg
PABA
10 mg
DNA
10 mg
RNA
10 mg
Tyrosine
7.2 mg
Cysteine Hydrochloride
3.5 mg
Soy Protein
50 mg
Proprietary Herbal Support Blend
310 mg
Gluten Free Adults 18–50
Report overview
A+ Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyA+ Value

Potassium iodide provides a stable, readily absorbed iodine form at an appropriate daily amount. The elemental dose is clear and remains below the upper intake limit. The crowded tablet formula may slow disintegration, but the low cost per serving supports good value.

PABA · 10 mg OverallScore82
A Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyD- Value

The PABA amount is clearly disclosed but remains a small supporting dose within a broad multinutrient formula. Its immediate-release tablet format is acceptable, and the supplied ingredient data does not show the additives flagged for concern. The low PABA amount results in weak cost efficiency for someone choosing primarily on PABA content.

B Active Ingredient Quality & BioavailabilityC- Dose, Safety & Label TransparencyA+ Value

Dicalcium phosphate is a sound mineral source, and the label clearly reports the phosphorus yield. The amount is incidental rather than targeted for substantial phosphorus support, despite the easy single-tablet serving. Very low serving cost helps value, but the formula is better viewed as a broad beauty-focused blend than a focused phosphorus supplement.

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Sources

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

  1. 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
  2. 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
  3. 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
  4. 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
  5. [Evaluation of the role of dietary intake in the occurrence of alopecia].
    El Fékih N; Kamoun H; Fazaa B; El Ati J; Zouari B; Kamoun MR; Gaigi S · Revue medicale de Liege · 2010
    Case-control study272 participantsHair Health forIodine
  6. 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
  7. 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
  8. 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
  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 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. [Efficacy of potassium N-acetylaminosuccinate (Cogitum) in the treatment of asthenic syndrome: results of double-blind placebo-controlled trial].
    Esin RG; Khayrullin IK; Esin OR; Fatykhova AF; Gismatullina EI; Isaeva YN · Zhurnal nevrologii i psikhiatrii imeni S.S. Korsakova · 2023
    Randomized trial37 participantsEnergy forPotassium
  14. Human resting energy expenditure in relation to dietary potassium.
    Dériaz O; Thériault G; Lavallée N; Fournier G; Nadeau A; Bouchard C · The American journal of clinical nutrition · 1991
    Randomized trial8 participantsEnergy forPotassium