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Heavenly Hair Tropical Citrus

OLLY
4.6
★ ★ ★ ★ ★
(156 ratings)
Silicon 21 mg
Biotin 3000 mcg
Horsetail 25 mg
Keratin 25 mg
Product Image
Score76
Useful silica, D-biotin, and zinc make this a practical hair and nail gummy. The keratin and botanicals are lightly dosed, and high-dose biotin can interfere with important blood tests.
How scoring works
Quantity:60 Gummy(ies) • (30 servings)
Goals:
Nail Health
Hair Health
Skin Health

Score 76

Useful silica, D-biotin, and zinc make this a practical hair and nail gummy. The keratin and botanicals are lightly dosed, and high-dose biotin can interfere with important blood tests.
How scoring works
$15.99($0.53 per serving)
iHerb
$ 15.99
Vitacost
$ 16.49
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Analysis

D-biotin at 3,000 mcg, 21 mg of silica, and zinc citrate form the useful core of the formula. Those ingredients make it most relevant to hair and nail support, especially when dietary intake is inadequate.

Keratin, horsetail, and amla are each supplied at only 25 mg. The label also omits keratin source and processing details plus the horsetail species and plant part, so these additions are harder to evaluate and unlikely to carry the formula.

Two gummies per day are convenient for users who avoid capsules. It is best viewed as a biotin-and-silica gummy with zinc, while anyone seeking meaningful keratin or well-characterized botanical extracts should look elsewhere.

Who is it for
  • Adults who prefer a hair and nail gummy
  • People seeking biotin with silica and zinc
  • Users who can disclose high-dose biotin before blood testing
Best for
  • Biotin-focused nail support
  • Silica supplementation in a gummy
  • Basic hair nutrient coverage

Pros

  • Uses the active D-biotin form
  • Provides a clearly stated 21 mg silica amount
  • Includes zinc citrate
  • Requires only two gummies per serving

Cons

  • Generic keratin is supplied at only 25 mg
  • Keratin source and processing are not disclosed
  • Horsetail and amla amounts are modest
  • Botanical species and standardization details are incomplete

Warnings

  • The 3,000 mcg biotin amount can distort thyroid, hormone, and cardiac troponin blood tests, so disclose use before laboratory testing.
  • Avoid stacking this gummy with other high-biotin hair supplements because the formula already provides far more than ordinary daily needs.
  • The keratin source is not identified, so people with animal-source allergies or dietary restrictions cannot confirm suitability from the label.

Nutrient quality

68 High impact

D-biotin and zinc citrate are favorable, while keratin processing and botanical standardization are not explained. Silica is useful and biotin is substantial, but keratin, horsetail, and amla are modest.

Ingredient transparency

85 Highest impact

Every listed active has a specific amount. No proprietary blend hides an active dose.

Customer satisfaction

69 High impact

The supplied average rating is very strong. The review count is adequate, but no detailed experience or complaint themes were provided.

Value for money

79 High impact

The affordable serving and useful silica amount support good value, though token keratin and botanicals limit depth. The product is competitive, though stronger category alternatives may offer more depth.

Report analysis

Goals

Nail Health
Nail Health
Impact
Highest effect
A Goal FitA Strength of SupportA CoverageA- Formula Quality
Silicon · 21 mgBiotin · 3000 mcgHorsetail · 25 mgKeratin · 25 mg

High-dose d-biotin and a useful silica amount directly support keratin production and nail strength. Zinc adds another relevant nutrient, while the small generic keratin amount contributes little.

The broad formula is well aligned with brittle-nail support despite limited detail about the horsetail extract and keratin processing. The biotin amount can interfere with some laboratory tests, so it should be disclosed before blood work.

Study evidence
Biotin Supportive 8 studies
Horsetail Not classified

No linked studies yet.

Keratin Adverse 7 studies
Silicon Supportive 2 studies
Zinc No effect 1 study
Hair Health
Hair Health
Impact
High effect
B Goal FitB Strength of SupportB+ CoverageB Formula Quality
Biotin · 3000 mcgZinc · 5.5 mgKeratin · 25 mg

Biotin, zinc, silica, keratin, horsetail, and amla cover several hair-related pathways. Useful silica and D-biotin amounts drive the formula, while the keratin amount is too small for meaningful structural support.

The label clearly identifies active D-biotin and a substantial silica amount but gives little detail about keratin processing or botanical standardization. High-dose biotin can distort thyroid, hormone, and cardiac laboratory results unless use is disclosed before testing.

Study evidence
Biotin Supportive 4 studies
Horsetail Not classified

No linked studies yet.

Keratin Disputed 14 studies
Silicon Supportive 2 studies
Zinc Supportive 22 studies
Skin Health
Skin Health
Impact
Moderate effect
C- Goal FitC+ Strength of SupportC- CoverageC+ Formula Quality
Zinc · 5.5 mgSilicon · 21 mg

Silica and zinc offer structural and repair support, while biotin is mainly useful when deficiency is present. Evidence for oral silica is emerging, whereas biotin and oral keratin have limited general skin evidence.

The silicon amount is useful, but keratin, horsetail, and amla are modest and biotin exceeds ordinary needs. D-biotin, zinc citrate, and silica amounts are clear, though horsetail standardization is incomplete.

Study evidence
Biotin Supportive 10 studies
Silicon Supportive 16 studies
Zinc Supportive 66 studies

Ingredients

IngredientAmount per serving
Calories
15 Calorie(s)
Total Carbohydrates
3 Gram(s)
Biotin (D-Biotin)
 3000 mcg
Zinc (Zinc Citrate)
 5.5 mg
Keratin
25 mg
Amla extract
25 mg
Horsetail extract
25 mg
Silica
21 mg
Gluten Free Adults 18–50
Report overview
Silicon · 21 mg OverallScore83
B- Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyB- Value

Horsetail extract provides a clearly disclosed silica yield that converts to a useful elemental silicon dose. Both the extract amount and active silica amount are listed, giving unusually good label clarity for a botanical source. The serving cost remains close to the collection norm, although no trademark or explicit standardization claim is shown.

View ingredientView products
Biotin (D-Biotin) · 3000 mcg OverallScore78
B+ Active Ingredient Quality & BioavailabilityB+ Dose, Safety & Label TransparencyC Value

The 3,000 mcg dose falls within the moderate-to-high potency range, and the label explicitly identifies active d-biotin. The gummy format is practical, and the broad formula makes a biotin-only cost comparison incomplete. Because 3,000 mcg of biotin can interfere with some lab tests, tell the testing clinician before blood work.

View ingredientView products
Horsetail · 25 mg OverallScore66
F Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyB- Value

The formula clearly states a substantial silica amount, but it does not show that this mineral is a standardized yield from horsetail. The horsetail extract dose is small and lacks a Latin species or plant-part identification, while biotin, zinc, keratin, and amla broaden the hair-support formula. Gummy delivery is convenient, though cost efficiency is only moderate for the disclosed silica quality.

View ingredientView products
Loading alternative details
77 Performance

Hair Ultra Softgels

OLLY
<p>Keratin, biotin, vitamin D3, zinc, and silicon provide a focused, fully disclosed hair-support formula. Keratin and silicon are still modest, and the very high biotin amount may interfere with laboratory tests.</p>
81 Performance

Hair Skin & Nails Collagen Plus Formula

Life Extension
<p>Substantial collagen peptides and keratin provide stronger structural support than the original's lightly dosed keratin and botanicals. Basic mineral forms and low silicon temper an otherwise focused formula with reasonable serving value.</p>
68 Performance

Keratin Hair Booster

Reserveage Nutrition
<p>A meaningful keratin amount and high biotin directly fit hair and nail support more strongly than the original's light keratin dose. Zinc oxide, copper sulfate, a hidden blend, and high serving cost reduce formula quality and value.</p>
68 Budget

Alive! Hair Skin & Nails Gummies Delicious Strawberry Flavored

Nature's Way
<p>The lower serving cost retains vitamin C, biotin, and zinc in a convenient gummy. Collagen and silica remain small, while added carbohydrate and a hidden produce blend offer no clear advantage over the original.</p>
71 Budget

Super Silica Plus

KAL
<p>The lower serving cost provides substantial horsetail and silica with MSM and biotin for a focused hair and nail profile. Standardization and absorption details are weak, and the branded absorption base remains vague.</p>
70 Budget

Hair Skin & Nails

Nature's Truth
<p>The lower serving cost supplies D-biotin, vitamin D3, natural vitamin E, vitamin C, and zinc. Collagen, hyaluronic acid, horsetail, and oils are token doses, while high biotin and preformed vitamin A require care.</p>
73 Value

Undeniable Beauty Grapefruit Glam

OLLY
<p>The lower serving cost preserves biotin and keratin in a narrow, hair-focused gummy. Keratin remains modest and high biotin can distort some laboratory tests, so the formula is economical but not structurally comprehensive.</p>
71 Value

Hair & Skin Strawberry Flavor

Noor Vitamins
<p>Biotin and vitamin E provide affordable beauty support with convenient gummy delivery. Collagen and silica are too small for strong structural benefit, while very high biotin and incomplete label details remain important limitations.</p>
65 Value

Vegan Collagen Builder +

Amen
<p>Vitamin C, biotin, lysine, proline, and silica create a plausible vegan framework for hair and collagen support at a moderate serving cost. The amino acids are modest, and numerous small fruit and herb additions contribute little depth.</p>
Report alternatives

Sources

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

  1. The Role of Sesbania grandiflora-Derived Biotin and Bambusa arundinacea-Derived Silica Extracts in Promoting Hair, Skin, and Nail Health: A Randomized, Double-Blind, Placebo-Controlled Clinical Study.
    Patel MN; Maheshvari J; Patel N · Cureus · 2025
    Randomized trial105 participantsSkin Health Hair Health Nail Health forBiotin Skin Health forSilicon
  2. Interventions for infantile seborrhoeic dermatitis (including cradle cap).
    Victoire A; Magin P; Coughlan J; van Driel ML · The Cochrane database of systematic reviews · 2019
    Systematic review35 participants2 studies pooledSkin Health forBiotin
  3. Anti-pollution cosmetic-based one-step formation of w/o/w multiple emulsion containing D-biotin for skin protection: fabrication and in vitro and in vivo evaluation.
    Ali A; Iqbal S; Ilyas A; Khan H; Asad MHHB; Fatima N; Akhtar N · Drug delivery and translational research · 2020
    Non-randomized trial15 participantsSkin Health forBiotin
  4. Effect of oral intake of choline-stabilized orthosilicic acid on skin, nails and hair in women with photodamaged skin.
    Barel A; Calomme M; Timchenko A; De Paepe K; Demeester N; Rogiers V; Clarys P; Vanden Berghe D · Archives of dermatological research · 2006
    Randomized trial50 participantsSkin Health Nail Health Hair Health forSilicon
  5. Biotin for the treatment of nail disease: what is the evidence?
    Lipner SR; Scher RK · The Journal of dermatological treatment · 2018
    Narrative reviewNail Health forBiotin
  6. Treatment of brittle fingernails and onychoschizia with biotin: scanning electron microscopy.
    Colombo VE; Gerber F; Bronhofer M; Floersheim GL · Journal of the American Academy of Dermatology · 1991
    Other32 participantsNail Health forBiotin
  7. Brittle nails: response to daily biotin supplementation.
    Hochman LG; Scher RK; Meyerson MS · Cutis · 1993
    Case series35 participantsNail Health forBiotin
  8. The Effects of an Oral Supplementation of a Natural Keratin Hydrolysate on Skin Aging: A Randomized, Double-Blind, Placebo-Controlled Clinical Study in Healthy Women.
    Tursi F; Nobile V; Cestone E; De Ponti I; Lepoudere A; Sergheraert R; Soulard JP · Journal of cosmetic dermatology · 2025
    Randomized trialNail Health Hair Health forKeratin
  9. Low serum biotinidase activity in children with valproic acid monotherapy.
    Schulpis KH; Karikas GA; Tjamouranis J; Regoutas S; Tsakiris S · Epilepsia · 2001
    Clinical trial125 participantsHair Health Skin Health forBiotin
  10. Vitamins A, B, C, and D: A Short Review for the Dermatologist.
    Coerdt KM; Goggins CA; Khachemoune A · Alternative therapies in health and medicine · 2021
    Narrative reviewHair Health forBiotin
  11. The Infatuation With Biotin Supplementation: Is There Truth Behind Its Rising Popularity? A Comparative Analysis of Clinical Efficacy versus Social Popularity.
    Soleymani T; Lo Sicco K; Shapiro J · Journal of drugs in dermatology : JDD · 2018
    Narrative reviewHair Health forBiotin
  12. Halloysite/Keratin Nanocomposite for Human Hair Photoprotection Coating.
    Cavallaro G; Milioto S; Konnova S; Fakhrullina G; Akhatova F; Lazzara G; Fakhrullin R; Lvov Y · ACS applied materials & interfaces · 2021
    In vitro / ex vivo studyHair Health forKeratin
  13. Annurca Apple Nutraceutical Formulation Enhances Keratin Expression in a Human Model of Skin and Promotes Hair Growth and Tropism in a Randomized Clinical Trial.
    Tenore GC; Caruso D; Buonomo G; D'Avino M; Santamaria R; Irace C; Piccolo M; Maisto M; Novellino E · Journal of medicinal food · 2018
    Randomized trialHair Health forKeratin
  14. Keratin/alginate hybrid hydrogels filled with halloysite clay nanotubes for protective treatment of human hair.
    Cavallaro G; Caruso MR; Milioto S; Fakhrullin R; Lazzara G · International journal of biological macromolecules · 2022
    In vitro / ex vivo studyHair Health forKeratin
  15. Patient Satisfaction and Adverse Effects Following the use of Topical Hair Fiber Fillers.
    Babadjouni A; Juhasz M; Pham C; Csuka E; Hedayati B; Evron E; Mesinkovska NA · International journal of trichology · 2024
    Cross-sectional study40 participantsHair Health forKeratin
  16. Effect of oral intake of choline-stabilized orthosilicic acid on hair tensile strength and morphology in women with fine hair
    R R Wickett, E Kossmann, A Barel, N Demeester, P Clarys, D Vanden Berghe, M Calomme · Archives of Dermatological Research · 2007
    Randomized trial48 participantsHair Health forSilicon
  17. 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
  18. 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
  19. 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
  20. 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
  21. 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
  22. Treatment of brittle nail with a hydroxypropyl chitosan-based lacquer, alone or in combination with oral biotin: A randomized, assessor-blinded trial.
    Chiavetta A; Mazzurco S; Secolo MP; Tomarchio G; Milani M · Dermatologic therapy · 2020
    Randomized trial50 participantsNail Health forBiotin
  23. Vitamins and minerals: their role in nail health and disease.
    Scheinfeld N; Dahdah MJ; Scher R · Journal of drugs in dermatology : JDD · 2007
    Narrative reviewNail Health forBiotin Nail Health forZinc
  24. Comparative Analysis of Type I Keratin Expression By Nail Consistency: An Immunohistochemistry Study.
    Mingorance Álvarez E; Rodríguez-León J; Pérez Pico AM; Mayordomo R · Applied immunohistochemistry & molecular morphology : AIMM · 2022
    Cross-sectional study32 participantsNail Health forKeratin
  25. Exposure to toxic agents alters organic elemental composition in human fingernails.
    Schumacher E; Dindorf W; Dittmar M · The Science of the total environment · 2009
    Cross-sectional study120 participantsNail Health forKeratin
  26. Human keratin diseases: hereditary fragility of specific epithelial tissues.
    Corden LD; McLean WH · Experimental dermatology · 1997
    Narrative reviewNail Health forKeratin
  27. Phenotype and genotype features of Vietnamese children with pachyonychia congenita.
    Chu HT; Dinh Duong TA; Le DH; Le TV; Nguyen BB; Dang CV; Vu QV · Pediatrics and neonatology · 2023
    Case series7 participantsNail Health forKeratin
  28. Nail Supplements: When, How, and Why?
    Zaraa I; Richert B · Skin appendage disorders · 2026
    Narrative reviewNail Health forSilicon
  29. Evaluation of biophysical skin parameters and hair changes in patients with acne vulgaris treated with isotretinoin, and the effect of biotin use on these parameters.
    Aksac SE; Bilgili SG; Yavuz GO; Yavuz IH; Aksac M; Karadag AS · International journal of dermatology · 2021
    Non-randomized trial60 participantsSkin Health forBiotin
  30. Generalized seborrhoeic dermatitis. Clinical and therapeutic data of 25 patients.
    Messaritakis J; Kattamis C; Karabula C; Matsaniotis N · Archives of disease in childhood · 1976
    Non-randomized trial25 participantsSkin Health forBiotin
  31. Holocarboxylase synthetase deficiency: novel clinical and molecular findings.
    Tammachote R; Janklat S; Tongkobpetch S; Suphapeetiporn K; Shotelersuk V · Clinical genetics · 2010
    Case series4 participantsSkin Health forBiotin
  32. The Efficacy of a Silicone Sheet in Postoperative Scar Management.
    Kim JS; Hong JP; Choi JW; Seo DK; Lee ES; Lee HS · Advances in skin & wound care · 2018
    Randomized trialSkin Health forSilicon
  33. A non-inferiority study to compare the effect of silica gel fiber dressing with alginate dressing on healing of venous leg ulcers.
    Zhang L; Yang J; Wang H; Cai Y; Zhao W; Dong R; Liu D; Lu X · Wound management & prevention · 2023
    Randomized trial130 participantsSkin Health forSilicon
  34. Retrospective Study on the Clinical Superiority of the Vacuum-Assisted Closure System with a Silicon-based Dressing over the Conventional Tie-over Bolster Technique in Skin Graft Fixation.
    Chou PR; Wu SH; Hsieh MC; Huang SH · Medicina (Kaunas, Lithuania) · 2020
    Cohort study26 participantsSkin Health forSilicon
  35. Silicon gel sheeting for preventing and treating hypertrophic and keloid scars.
    O'Brien L; Pandit A · The Cochrane database of systematic reviews · 2006
    Meta-analysis559 participants13 studies pooledSkin Health forSilicon
  36. Sex-related differences in response to zinc pyrithione shampoo vs. non-anti-dandruff shampoo.
    Collins LZ; Baines FL; Matheson JR; Turner GA; Diao Y; Li Y; Pi Y · International journal of cosmetic science · 2019
    Meta-analysis2,088 participants20 studies pooledSkin Health forZinc
  37. Maintenance of an Acidic Skin Surface with a Novel Zinc Lactobionate Emollient Preparation Improves Skin Barrier Function in Patients with Atopic Dermatitis.
    Andrew PV; Pinnock A; Poyner A; Brown K; Chittock J; Kay LJ; Cork MJ; Danby SG · Dermatology and therapy · 2024
    Cohort study23 participantsSkin Health forZinc
  38. Spatial expression of metallothionein, matrix metalloproteinase-1 and Ki-67 in human epidermal wounds treated with zinc and determined by quantitative immunohistochemistry: A randomised double-blind trial.
    Ågren MS; Chafranska L; Eriksen JO; Forman JL; Bjerrum MJ; Schjerling P; Larsen HF; Cottarelli E; Jorgensen LN; Gjerdrum LMR · European journal of cell biology · 2021
    Randomized trial30 participantsSkin Health forZinc
  39. A pilot trial using topical regular crystalline insulin vs. aqueous zinc solution for uncomplicated cutaneous wound healing: Impact on quality of life.
    Attia EA; Belal DM; El Samahy MH; El Hamamsy MH · Wound repair and regeneration : official publication of the Wound Healing Society [and] the European Tissue Repair Society · 2014
    Randomized trial90 participantsSkin Health forZinc
  40. Evidence-Based Nutritional Interventions in Wound Care.
    Saeg F; Orazi R; Bowers GM; Janis JE · Plastic and reconstructive surgery · 2021
    Systematic review2,339 participants36 studies pooledSkin Health forZinc