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HeightFactor

Advanced Nutrition by Zahler
4.5
★ ★ ★ ★ ★
(2472 ratings)
Thiamin 50 mg
Iodine 150 mcg
Niacin 50 mg
Vitamin B5 50 mg
Vitamin B6 50 mg
Lysine 250 mg
Riboflavin 50 mg
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Score64
A broad, high-potency vitamin and plant blend with some relevance to normal energy metabolism. High B6, weaker mineral forms, modest lysine, a large daily serving, and limited goal alignment reduce its usefulness.
How scoring works
Quantity:120 Capsule(s) • (30 servings)
Goals:
Hair Health
Energy

Score 64

A broad, high-potency vitamin and plant blend with some relevance to normal energy metabolism. High B6, weaker mineral forms, modest lysine, a large daily serving, and limited goal alignment reduce its usefulness.
How scoring works
$27.92($0.93 per serving)
Vitacost
$ 30.73
iHerb
$ 27.92
Amazon
$ 27.92
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Analysis

Thiamine, riboflavin, niacinamide, vitamin B6, and pantothenic acid form a high-potency B-vitamin base that can support normal energy metabolism. The formula may be most useful where dietary intake is inadequate, but large amounts do not automatically create extra energy in a well-nourished user.

Iodine, zinc, vitamin D, vitamin C, and beta-carotene add broad nutritional coverage, while chlorella and alfalfa contribute plant material. Magnesium oxide and zinc oxide are less appealing forms, and the 250 mg lysine amount provides only partial amino-acid support rather than a substantial targeted serving.

Hair-health alignment is incomplete because the product lacks several common hair-focused nutrients and provides no evidence that its plant powders improve growth. The four-capsule daily serving and high cost are difficult to justify when simpler multivitamin or B-complex products can cover the most relevant ingredients.

Who is it for
  • Adults seeking a broad high-potency nutrient blend
  • Users whose intake of B vitamins or iodine may be low
  • People comfortable with a four-capsule routine
Best for
  • General B-vitamin coverage
  • Supporting normal energy metabolism
  • Adding iodine and basic micronutrients

Pros

  • High-potency B-vitamin profile
  • Provides a full daily-support amount of iodine
  • Includes vitamin C, vitamin D, zinc, and calcium
  • Uses cracked-cell-wall chlorella

Cons

  • Vitamin B6 amount is high for routine long-term use
  • Magnesium and zinc use oxide forms
  • Lysine amount is modest
  • Four-capsule serving reduces convenience
  • Weak value for the forms and amounts supplied

Warnings

  • The 50 mg vitamin B6 serving is high enough to be a concern with long-term daily use because excess B6 can cause nerve symptoms such as tingling or numbness.
  • Kelp-derived iodine can vary naturally and may be unsuitable for people with thyroid conditions or those taking thyroid medicine without professional guidance.
  • Alfalfa can be relevant to people using warfarin because its vitamin K content may interfere with stable anticoagulation.
  • The niacinamide amount may cause nausea or stomach discomfort in sensitive users even though it is less likely to cause flushing than nicotinic acid.

Nutrient quality

56 Moderate impact

Calcium citrate, vitamin D3, pantothenate, and lysine hydrochloride are useful forms, but oxide minerals and standard pyridoxine reduce quality. Several nutrients are meaningful, while modest mineral and lysine amounts plus high pyridoxine weaken the balance.

Ingredient transparency

82 Highest impact

Every listed active has a specific amount and no proprietary blend hides the formula. The multi-capsule serving is inferable, but daily directions and inactive ingredients are missing.

Customer satisfaction

68 High impact

The average rating is favorable and supported by a substantial evidence base. No specific feedback is supplied to judge repeated complaints or whether experience matches the intended use.

Value for money

45 Lower impact

Premium serving cost is difficult to justify given the mixed forms and modest amounts of several key nutrients. Broad but weakly focused plant additions also reduce category competitiveness.

Report analysis

Goals

Hair Health
Hair Health
Impact
Moderate effect
C- Goal FitD+ Strength of SupportC- CoverageC+ Formula Quality
Vitamin D · 10 mcgZinc · 11 mgLysine · 250 mgVitamin C · 100 mg

L-lysine, zinc, vitamin C, iodine, and vitamin D3 provide a modest foundation for hair. Lysine can support protein structure and may complement iron-rich diets even though no iron is included.

The lysine amount is low, zinc uses oxide, and no biotin, selenium, silicon, or dedicated hair botanical is present. The growth-focused formula offers partial rather than comprehensive hair support.

Study evidence
Iodine No effect 1 study
Lysine Supportive 1 study
Vitamin C Mixed 5 studies
Vitamin D Disputed 34 studies
Zinc Supportive 22 studies
Energy
Energy
Impact
Moderate effect
C- Goal FitC- Strength of SupportD+ CoverageD+ Formula Quality
Iodine · 150 mcgVitamin D · 10 mcgVitamin B5 · 50 mgMagnesium · 75 mgRiboflavin · 50 mgThiamin · 50 mg

High-potency B vitamins provide meaningful metabolic cofactors, while iodine supports thyroid-related energy regulation. The formula nevertheless targets growth and structural nutrition rather than fatigue, stamina, or alertness.

Magnesium and zinc use oxide forms, and the chlorella, alfalfa, and lysine additions do not create a strong energy pathway. The high vitamin B6 amount may raise the risk of tingling or numbness with prolonged daily use.

Study evidence
Iodine Adverse 3 studies
Magnesium Supportive 4 studies
Riboflavin Mixed 6 studies
Thiamin Disputed 12 studies

Ingredients

IngredientAmount per serving
Vitamin A (Beta-Carotene)
 750 mcg
Vitamin C (Ascorbic Acid)
 100 mg
Vitamin D3 (Cholecalciferol)
 10 mcg
Thiamine (Thiamine Hydrochloride)
 50 mg
Riboflavin
50 mg
Niacin (Niacinamide)
 50 mg
Vitamin B6 (Pyridoxine Hydrochloride)
 50 mg
Pantothenic Acid (Calcium D-Pantothenate)
 50 mg
Calcium (Calcium Citrate)
 125 mg
Iodine (Kelp)
 150 mcg
Magnesium (Magnesium Oxide)
 75 mg
Zinc (Zinc Oxide)
 11 mg
Chlorella cracked cell wall powder
800 mg
Alfalfa herb powder
500 mg
L-Lysine (L-Lysine Hydrochloride)
 250 mg
Gluten Free Adults 18–50 Kosher Dairy Free Vegetarian
Report overview
Thiamin (Thiamine Hydrochloride) · 50 mg OverallScore76
B- Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyD- Value

Thiamine hydrochloride supplies a conventional and clearly identified source of vitamin B1. The 50 mg amount reaches the high-potency range, though ordinary capsules do not add advanced delivery benefits. The high serving cost makes it inefficient as a thiamin-focused option.

View ingredientView products
Iodine (Kelp) · 150 mcg OverallScore70
C+ Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyF Value

Kelp provides a useful whole-food iodine source, though natural variation makes it less predictable than an isolated iodide salt. The 150 mcg amount falls in the optimal daily-support range and is explicitly disclosed. The serving is expensive for iodine-focused use and lacks a qualifying selenium or tyrosine amount to offset the premium.

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Niacin (Niacinamide) · 50 mg OverallScore66
B+ Active Ingredient Quality & BioavailabilityB Dose, Safety & Label TransparencyF Value

The 50 mg niacinamide amount is suitable for general B-vitamin or multivitamin coverage. The two capsules is practical but adds no specialized release technology, and the label provides no explicit no-flush guidance. The serving is expensive relative to the niacin form and amount.

View ingredientView products
Loading alternative details
76 Performance

B Complex

INNATE Response Formulas
Moderate B-vitamin amounts create a less aggressive daily profile, with vitamin B6 far below the original high serving. Pyridoxine and cyanocobalamin are conventional forms and the product omits iodine, lysine, and minerals, but its dosing is better suited to routine energy support.
77 Performance

Vitamin B Complex

California Gold Nutrition
Active riboflavin and B6 forms improve chemical quality, while folate and pantothenic acid provide broad metabolic coverage. Duplicate entries make B6 and niacin totals unclear and potentially high, but the formula avoids poorly absorbed magnesium and zinc oxides and an unsupported height focus.
74 Performance

Stress B-Complex

Thorne
Methylcobalamin, choline citrate, and substantial pantothenic acid provide a coherent stress and energy formula with more purposeful ingredients. B6 and niacin remain elevated and several forms are unspecified, while iodine, lysine, chlorella, and structural minerals are absent.
78 Budget

B-50 Complex

21st Century
A broad B-complex covers the original product's thiamin, riboflavin, niacin, B6, and pantothenic acid themes at much lower serving cost. It does not provide iodine, chlorella, lysine, or meaningful minerals, while the high pyridoxine amount remains unsuitable for prolonged unsupervised use.
74 Budget

B 50 Complex

Spring Valley
Core B vitamins are supplied at substantial nominal amounts in a very low-cost formula. Chemical forms are missing and vitamin B6 remains high, but the simpler profile avoids paying for modest lysine and poorly absorbed oxide minerals.
74 Budget

B-Complex '50'

Solgar
Broad energy-metabolism coverage comes at a small fraction of the original serving cost with clear active amounts. Conventional forms and high vitamin B6 remain drawbacks, and the formula does not support the original height-positioning claim or replace iodine and lysine.
71 Value

B 50 Complex

Thompson
A broad B-vitamin panel closely matches the original energy-metabolism ingredients at very favorable serving value. Conventional forms, a hidden base blend, and high B6 limit quality, but the economical formula avoids low-value mineral oxides and modest lysine.
77 Value

B-50 Complex

Nature's Way
Active riboflavin improves an otherwise conventional B-complex with broad, clearly stated amounts. Vitamin B6 is still unnecessarily high for long-term use, but the lower serving cost and focused label improve value for basic energy support.
73 Value

B-50 Gels

Carlson
A complete B-complex provides transparent dosing across the main energy nutrients at favorable serving value. Conventional forms and high B6 remain concerns, while the added fat and protein do not improve the core purpose and no height benefit is established.
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Sources

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

  1. 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
  2. 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
  3. 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
  4. 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
  5. 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
  6. Red blood cell magnesium and chronic fatigue syndrome.
    Cox IM; Campbell MJ; Dowson D · Lancet (London, England) · 1991
    Randomized trial32 participantsEnergy forMagnesium
  7. Exercise, magnesium and immune function.
    Laires MJ; Monteiro C · Magnesium research · 2008
    Narrative reviewEnergy forMagnesium
  8. Physicochemical properties of and volatile compounds in riboflavin fortified cloudy apple juice; study of its effect on job fatigue among Egyptian construction workers.
    Fouad S; Ibrahim GE; Hussein AMS; Ibrahim FA; El Gendy A · Heliyon · 2021
    Non-randomized trialEnergy forRiboflavin
  9. Vitamin B status in patients with chronic fatigue syndrome.
    Heap LC; Peters TJ; Wessely S · Journal of the Royal Society of Medicine · 1999
    Case-control study30 participantsEnergy forRiboflavin
  10. B-vitamins, related vitamers, and metabolites in patients with quiescent inflammatory bowel disease and chronic fatigue treated with high dose oral thiamine.
    Bager P; Hvas CL; Hansen MM; Ueland P; Dahlerup JF · Molecular medicine (Cambridge, Mass.) · 2023
    Observational studyEnergy forRiboflavin
  11. Metabolic features of chronic fatigue syndrome.
    Naviaux RK; Naviaux JC; Li K; Bright AT; Alaynick WA; Wang L; Baxter A; Nathan N; Anderson W; Gordon E · Proceedings of the National Academy of Sciences of the United States of America · 2024
    Case-control study84 participantsEnergy forRiboflavin
  12. Effectiveness of Riboflavin in Inherited Metabolic Diseases: A Systematic Review
    Bregje Jaeger, Nina N Stolwijk, Femke Aaldering, Charlotte A Ruys, Marije Smits, Nicole I Wolf, Carla E M Hollak, Annet M Bosch · Journal of Inherited Metabolic Disease · 2026
    Systematic review381 studies pooledEnergy forRiboflavin
  13. Influence of thiamin supplementation on the health and general well-being of an elderly Irish population with marginal thiamin deficiency.
    Smidt LJ; Cremin FM; Grivetti LE; Clifford AJ · Journal of gerontology · 1991
    Randomized trial80 participantsEnergy forThiamin
  14. Randomised clinical trial: high-dose oral thiamine versus placebo for chronic fatigue in patients with quiescent inflammatory bowel disease.
    Bager P; Hvas CL; Rud CL; Dahlerup JF · Alimentary pharmacology & therapeutics · 2021
    Randomized trial40 participantsEnergy forThiamin
  15. Dietary reference values for thiamin.
    EFSA Panel on Dietetic Products, Nutrition and Allergies (NDA); Turck D; Bresson JL; Burlingame B; Dean T; Fairweather-Tait S; Heinonen M; Hirsch-Ernst KI; Mangelsdorf I; McArdle HJ; Naska A; Nowicka G; Pentieva K; Sanz Y; Siani A; Sjödin A; Stern M; Tomé D; Van Loveren H; Vinceti M; Willatts P; Lamberg-Allardt C; Przyrembel H; Tetens I; Gudelj Rakic J; Ioannidou S; de Sesmaisons-Lecarré A; Forss AC; Neuhäuser-Berthold M · EFSA journal. European Food Safety Authority · 2026
    Guideline / consensusEnergy forThiamin
  16. Effects of thiamine supplementation on exercise-induced fatigue.
    Suzuki M; Itokawa Y · Metabolic brain disease · 1996
    Randomized trial16 participantsEnergy forThiamin
  17. Long-term maintenance treatment with 300 mg thiamine for fatigue in patients with inflammatory bowel disease: results from an open-label extension of the TARIF study.
    Bager P; Hvas CL; Rud CL; Dahlerup JF · Scandinavian journal of gastroenterology · 2022
    Randomized trialEnergy forThiamin
  18. [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
  19. Causes of hair loss and the developments in hair rejuvenation.
    Rushton DH; Norris MJ; Dover R; Busuttil N · International journal of cosmetic science · 2010
    Narrative reviewHair Health forLysine
  20. 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
  21. 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
  22. 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
  23. 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
  24. 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
  25. Increased prevalence of vitamin D deficiency in patients with alopecia areata: a systematic review and meta-analysis.
    Lee S; Kim BJ; Lee CH; Lee WS · Journal of the European Academy of Dermatology and Venereology : JEADV · 2018
    Meta-analysis2,039 participants14 studies pooledHair Health forVitamin D
  26. Intralesional vitamin D3 in treatment of alopecia areata: A randomized controlled clinical trial.
    Rashad AF; Elgamal E; Fouda I · Journal of cosmetic dermatology · 2022
    Randomized trial60 participantsHair Health forVitamin D
  27. Vitamin D and its Analogs in Treatment of Mild to Moderate Alopecia Areata: Systematic Review and Meta-Analysis.
    Alsaati AA; Kaliyadan F; Alsaadoun D; Alzakry LM; Alzabadin RA; Hakami TH; Rubaian NFB · Indian dermatology online journal · 2025
    Meta-analysisHair Health forVitamin D
  28. Topical calcipotriol vs narrowband ultraviolet B in treatment of alopecia areata: a randomized-controlled trial.
    El Taieb MA; Hegazy EM; Ibrahim HM; Osman AB; Abualhamd M · Archives of dermatological research · 2020
    Randomized trial60 participantsHair Health forVitamin D
  29. Serum 25 hydroxyvitamin D in non-scarring alopecia: A systematic review and meta-analysis.
    Chen Y; Dong X; Wang Y; Li Y; Xiong L; Li L · Journal of cosmetic dermatology · 2024
    Meta-analysis10,670 participants23 studies pooledHair Health forVitamin D
  30. The effects of minoxidil, 1% pyrithione zinc and a combination of both on hair density: a randomized controlled trial.
    Berger RS; Fu JL; Smiles KA; Turner CB; Schnell BM; Werchowski KM; Lammers KM · The British journal of dermatology · 2003
    Randomized trial200 participantsHair Health forZinc
  31. Incubatory environment of the scalp impacts pre-emergent hair to affect post-emergent hair cuticle integrity.
    Schwartz JR; Henry JP; Kerr KM; Flagler MJ; Page SH; Redman-Furey N · Journal of cosmetic dermatology · 2018
    Randomized trialHair Health forZinc
  32. A comparison of hair quality and cosmetic acceptance following the use of two anti-dandruff shampoos.
    Draelos ZD; Kenneally DC; Hodges LT; Billhimer W; Copas M; Margraf C · The journal of investigative dermatology. Symposium proceedings · 2006
    Randomized trial40 participantsHair Health forZinc
  33. BMI and levels of zinc, copper in hair, serum and urine of Turkish male patients with androgenetic alopecia.
    Ozturk P; Kurutas E; Ataseven A; Dokur N; Gumusalan Y; Gorur A; Tamer L; Inaloz S · Journal of trace elements in medicine and biology : organ of the Society for Minerals and Trace Elements (GMS) · 2015
    Case-control study216 participantsHair Health forZinc
  34. Analysis of serum zinc and copper concentrations in hair loss.
    Kil MS; Kim CW; Kim SS · Annals of dermatology · 2013
    Case-control study342 participantsHair Health forZinc