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Zinc 15 mg

4.9
★ ★ ★ ★ ★
(3594 ratings)
Zinc 15 mg
Product Image
Score76

Flexible liquid dosing and a measured amount are useful. Sulfate form quality, a cumbersome serving, and weak value limit the product.

How scoring works
Liquid
Quantity:3 Liquid(s) • (28 servings)
Goals:
Immunity
General Health
Hair Health

Score 76

Flexible liquid dosing and a measured amount are useful. Sulfate form quality, a cumbersome serving, and weak value limit the product.

How scoring works
$14.99($0.53 per serving)
Vitacost
$ 18.75
iHerb
$ 16.50
Pure Formulas
$ 14.99
iHerb
$ 16.50
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Analysis

The liquid supplies 15 mg of zinc sulfate, with both form and elemental amount clearly stated. Sulfate is generally less comfortable and less attractive than better organic or chelated zinc forms.

A maintenance-level amount can help cover inadequate zinc intake without approaching the adult upper limit. Flexible liquid measurement may suit people who cannot swallow tablets or want to adjust intake.

The full serving requires four droppers and offers poor value for the zinc delivered. Its convenience depends heavily on needing a liquid rather than simply wanting routine zinc support.

Who is it for
  • Adults who cannot swallow zinc tablets or capsules
  • People who need an adjustable liquid amount
Best for
  • Liquid zinc maintenance
  • Dose flexibility below the full 15 mg serving

Pros

  • Liquid format allows dose adjustment
  • Clearly states form and amount
  • Maintenance-level serving
  • Stays below the adult upper intake level

Cons

  • Sulfate may be less comfortable than chelated forms
  • Requires four droppers per serving
  • Poor value for zinc delivery
  • Single mineral provides narrow coverage

Warnings

  • Zinc sulfate may cause stomach upset, especially when taken without food.
  • Accurate dropper measurement matters because the full serving requires multiple droppers.
  • Long-term use alongside other zinc supplements can reduce copper absorption.
  • Zinc can reduce absorption of tetracycline or quinolone antibiotics, so dose spacing should follow the medicine instructions.

Nutrient quality

85 Highest impact

Zinc sulfate is an inexpensive inorganic form that may be less well tolerated than chelates or organic salts. The amount stays within a practical maintenance range for most adults.

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Ingredient transparency

83 Highest impact

The elemental amount and sulfate form are stated clearly. Directions and inactive ingredients are not supplied, limiting full label transparency.

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Customer satisfaction

73 High impact

The supplied aggregate rating indicates exceptionally strong customer satisfaction. Specific comments are unavailable, so complaint patterns and intended-use fit cannot be verified.

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Value for money

58 Moderate impact

Flexible liquid dosing offers convenience, but the serving cost is high for a basic zinc form. Better-form capsules provide stronger category value.

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Report analysis

Goals

Immunity
Immunity
Impact
Highest effect
A- Goal FitB Strength of SupportC- CoverageA Formula Quality
Zinc · 15 mg

A maintenance amount of zinc directly supports normal immune-cell development and communication. The single-mineral approach is focused rather than comprehensive.

The 15 mg serving reaches the stated immune-support threshold and is clearly disclosed. Zinc sulfate is less absorbable and may be harder on digestion than organic zinc salts.

Study evidence
Zinc Supportive 73 studies
General Health
General Health
Impact
Highest effect
A- Goal FitB Strength of SupportC CoverageA Formula Quality
Zinc · 15 mg

A maintenance amount of zinc directly supports a foundational nutrient need tied to immune function and normal cellular processes. The single-mineral approach is narrow, but its purpose is clear.

The liquid serving allows dose adjustment and fully discloses the elemental amount. Zinc sulfate is less absorbable and may be harder on digestion than chelated forms.

Study evidence
Zinc Supportive 60 studies
Hair Health
Hair Health
Impact
High effect
B Goal FitB- Strength of SupportD CoverageA Formula Quality
Zinc · 15 mg

A maintenance-level zinc amount may help hair when zinc intake or status is low. Zinc sulfate is clearly disclosed but is less absorbable and less comfortable than better chelated forms.

The single-mineral formula offers useful depth for one deficiency pathway. It does not address structural proteins, hormonal factors, or other common causes of thinning.

Study evidence
Zinc Supportive 22 studies
Testosterone Support
Testosterone Support
Impact
Moderate effect
C- Goal FitC Strength of SupportD- CoverageA- Formula Quality
Zinc · 15 mg

A maintenance amount of zinc may support normal testosterone synthesis when zinc status is low. Evidence does not establish a dependable increase for people who already consume enough zinc.

The liquid label states both the elemental amount and sulfate form clearly. Zinc sulfate is less favorable for absorption and stomach tolerance than better organic forms, and the formula covers no other relevant pathway.

Study evidence
Zinc Disputed 7 studies
Skin Health
Skin Health
Impact
Moderate effect
D Goal FitC Strength of SupportF CoverageB Formula Quality
Zinc · 15 mg

Zinc contributes to normal skin repair and barrier function at a useful 15 mg amount. Zinc sulfate is a standard form, but the single mineral cannot address hydration, collagen structure, and oxidative defense together.

The amount and form are clear in the liquid. Focus is excellent, while the narrow pathway coverage limits use as a complete skin formula.

Study evidence
Zinc Supportive 66 studies

Ingredients

IngredientAmount per serving
Zinc (Zinc Sulfate)
 15 mg
Adults 18–50 Organic
Report overview
Zinc (Zinc Sulfate) · 15 mg OverallScore54
F Active Ingredient Quality & BioavailabilityA- Dose, Safety & Label TransparencyF Value

Zinc sulfate is an inexpensive inorganic form with weaker tolerance and absorption than organic salts. The elemental amount is well suited to maintenance rather than high-potency use. Copper is absent, but the moderate zinc exposure keeps long-term imbalance risk relatively low. The liquid format allows flexible dosing but requires four droppers per serving. Serving value is poor when judged specifically for zinc delivery.

View ingredientView products
Loading alternative details
92 Performance

Zinc Picolinate

NutriCology
Strong zinc-form quality and a practical dose make this a more dependable routine option than the original. Picolinate provides a well-absorbed form at a strong maintenance amount in a simple capsule. Zinc picolinate is a well-regarded form with favorable absorption.
90 Performance

Zinc Picolinate 25 mg

Kirkman
Strong zinc-form quality and a practical dose make this a more dependable routine option than the original. Zinc picolinate provides a highly absorbable form at a substantial but not excessive amount. Small calcium and phosphorus additions do little to strengthen the zinc formula, while inactive ingredients are not shown.
89 Performance

Zinc Picolinate 25 mg

Country Life
Strong zinc-form quality and a practical dose make this a more dependable routine option than the original. Picolinate offers strong absorption at a useful amount below the adult upper limit. The small calcium addition contributes little, and the serving cost is higher than many basic zinc products.
94 Budget

Zinc Picolinate 25 mg

Thompson
Lower recurring cost makes this a more economical zinc option than the original while retaining a clearly characterized active profile. Picolinate is a well-absorbed zinc form, and the amount is meaningful without crossing the usual adult upper limit. The simple formula and very low serving cost make it a practical zinc supplement.
93 Budget

Zinc Picolinate 22 mg

Solgar
Lower recurring cost makes this a more economical zinc option than the original while retaining a clearly characterized active profile. Picolinate offers strong absorption potential at a useful maintenance amount. The focused formula and very low serving cost make it a practical choice without an obvious dosing excess.
91 Budget

Zinc Picolinate 22 mg

Swanson
Lower recurring cost makes this a more economical zinc option than the original while retaining a clearly characterized active profile. Picolinate provides a well-absorbed form at a practical maintenance amount. Zinc picolinate is a well-regarded form with favorable absorption.
96 Value

Zinc Bisglycinate 15 mg

Thorne
The combination of form quality, practical dosing, and serving value provides a stronger quality-to-cost balance than the original. A premium bisglycinate chelate provides a practical maintenance amount with good tolerance potential. TRAACS zinc bisglycinate is a premium chelate designed for absorption and digestive tolerance.
92 Value

L-OptiZinc 30 mg

NOW
The combination of form quality, practical dosing, and serving value provides a stronger quality-to-cost balance than the original. Zinc monomethionine provides excellent absorption potential at a substantial amount. A small copper addition is helpful but remains too low to fully balance sustained high zinc use.
90 Value

Zinc Chelate 30 mg

Nature's Way
The combination of form quality, practical dosing, and serving value provides a stronger quality-to-cost balance than the original. Zinc bisglycinate provides a well-absorbed form at a robust daily amount. The focused capsule is clearly labeled and very inexpensive, but no copper is included.
Report alternatives

Sources

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

  1. Effectiveness of sodium bicarbonate and zinc chloride mouthwashes in the treatment of oral mucositis and quality of life in patients with cancer under chemotherapy.
    Mohammadi F; Oshvandi K; Kamallan SR; Khazaei S; Ranjbar H; Ahmadi-Motamayel F; Gillespie M; Jenabi E; Vafaei SY · Nursing open · 2022
    Randomized trial144 participantsGeneral Health forZinc
  2. Zinc supplementation in young children with acute diarrhea in India.
    Sazawal S; Black RE; Bhan MK; Bhandari N; Sinha A; Jalla S · The New England journal of medicine · 1995
    Randomized trial937 participantsGeneral Health forZinc
  3. Associations of mortality with ocular disorders and an intervention of high-dose antioxidants and zinc in the Age-Related Eye Disease Study: AREDS Report No. 13.
    Clemons TE; Kurinij N; Sperduto RD; AREDS Research Group · Archives of ophthalmology (Chicago, Ill. : 1960) · 2004
    Randomized trial4,753 participantsGeneral Health forZinc
  4. Effects of zinc and probiotic co-supplementation on inflammation, gastrointestinal symptoms, quality of life, and mood in irritable bowel syndrome patients.
    Rezazadegan M; Soheilipour M; Amani R · Scientific reports · 2026
    Randomized trial84 participantsGeneral Health forZinc
  5. Effect of zinc sulfate supplementation on premenstrual syndrome and health-related quality of life: Clinical randomized controlled trial.
    Siahbazi S; Behboudi-Gandevani S; Moghaddam-Banaem L; Montazeri A · The journal of obstetrics and gynaecology research · 2018
    Randomized trial142 participantsGeneral Health forZinc
  6. 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
  7. 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
  8. 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
  9. 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
  10. 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
  11. Nutrient supplementation for prevention of viral respiratory tract infections in healthy subjects: A systematic review and meta-analysis.
    Vlieg-Boerstra B; de Jong N; Meyer R; Agostoni C; De Cosmi V; Grimshaw K; Milani GP; Muraro A; Oude Elberink H; Pali-Schöll I; Roduit C; Sasaki M; Skypala I; Sokolowska M; van Splunter M; Untersmayr E; Venter C; O'Mahony L; Nwaru BI · Allergy · 2022
    Meta-analysis199,055 participants115 studies pooledImmunity forZinc
  12. Zinc supplementation reduces the incidence of acute lower respiratory infections in infants and preschool children: a double-blind, controlled trial.
    Sazawal S; Black RE; Jalla S; Mazumdar S; Sinha A; Bhan MK · Pediatrics · 1998
    Randomized trial609 participantsImmunity forZinc
  13. A randomized controlled trial of zinc supplementation in the treatment of acute respiratory tract infection in Thai children.
    Rerksuppaphol S; Rerksuppaphol L · Pediatric reports · 2020
    Randomized trial64 participantsImmunity forZinc
  14. The effect of zinc and vitamin A supplementation on immune response in an older population.
    Fortes C; Forastiere F; Agabiti N; Fano V; Pacifici R; Virgili F; Piras G; Guidi L; Bartoloni C; Tricerri A; Zuccaro P; Ebrahim S; Perucci CA · Journal of the American Geriatrics Society · 1998
    Randomized trial136 participantsImmunity forZinc
  15. The role of specific nutrients in preventing immune system and blood cell disorders: an umbrella review.
    Vecchietti A; Strano P; Minutolo G; Grieco V; Cappuccio G; Granvillano G; Confalonieri L; Briganti GL; Raso E; Chimienti M; Pellegrini M; Mercogliano M; Spatari G; Lugli C; Urbano T; Lorenzon A · Journal of preventive medicine and hygiene · 2026
    Systematic review13 studies pooledImmunity forZinc
  16. 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
  17. 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
  18. 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
  19. 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
  20. 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
  21. Environmental exposure to metals and male reproductive hormones: circulating testosterone is inversely associated with blood molybdenum.
    Meeker JD; Rossano MG; Protas B; Padmanahban V; Diamond MP; Puscheck E; Daly D; Paneth N; Wirth JJ · Fertility and sterility · 2010
    Cross-sectional study219 participantsTestosterone Support forZinc
  22. Nonpharmacological Interventions for the Management of Testosterone and Sperm Parameters: A Scoping Review.
    Santos HO; Cadegiani FA; Forbes SC · Clinical therapeutics · 2022
    Scoping reviewTestosterone Support forZinc
  23. Zinc is an Essential Element for Male Fertility: A Review of Zn Roles in Men's Health, Germination, Sperm Quality, and Fertilization.
    Fallah A; Mohammad-Hasani A; Colagar AH · Journal of reproduction & infertility · 2020
    Narrative reviewTestosterone Support forZinc
  24. Clinical, endocrinological and biochemical effects of zinc deficiency.
    Prasad AS · Clinics in endocrinology and metabolism · 1986
    Narrative reviewTestosterone Support forZinc
  25. Clinical, endocrinologic, and biochemical effects of zinc deficiency.
    Prasad AS · Special topics in endocrinology and metabolism · 1986
    Narrative reviewTestosterone Support forZinc