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TestHD Thermo

4.6
★ ★ ★ ★ ★
(397 ratings)
Zinc 30 mg
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Score46
A meaningful zinc gluconate amount is overshadowed by two undisclosed blends that prevent evaluation of most of the formula. Transparency and long-term mineral balance are the main weaknesses.
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Capsule
Quantity:90 Capsule(s) • (30 servings)
Goals:
Hair Health
General Health

Score 46

A meaningful zinc gluconate amount is overshadowed by two undisclosed blends that prevent evaluation of most of the formula. Transparency and long-term mineral balance are the main weaknesses.
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$29.99($0.99 per serving)
iHerb
$ 29.99
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Analysis

The only fully assessable active is 30 mg of zinc gluconate. That amount may support normal zinc-dependent functions when intake is low, but zinc alone is not a direct thermogenic or broad fitness ingredient.

Male Support Matrix and Neuro + Energy Matrix entries provide neither ingredients nor usable amounts in the supplied data. Those gaps make it impossible to judge most of the testosterone, energy, or thermogenic positioning.

Three capsules per serving and a relatively costly serving reduce practicality. Users also cannot screen the hidden blends for stimulants, allergens, or medication interactions from the information provided.

Who is it for
  • Adults willing to obtain the complete blend label before use
  • Users specifically seeking 30 mg of zinc within a broader formula
  • People who do not need a fully transparent performance supplement
Best for
  • Targeted zinc support within a male-focused product
  • Users who can verify the energy blend contents
  • Shorter periods of use

Pros

  • Uses zinc gluconate
  • Clearly states the elemental zinc amount
  • Keeps the disclosed zinc below the usual adult upper level
  • Combines male-support and energy positioning in one serving

Cons

  • Two major blends have undisclosed contents
  • Most claimed functions cannot be assessed
  • No copper is disclosed
  • Requires three capsules per serving
  • Value is weak if zinc is the main assessable active

Warnings

  • The undisclosed energy matrix could contain stimulants or interacting ingredients; verify the complete label before use.
  • Prolonged daily intake of 30 mg zinc without copper may impair copper balance, especially alongside other zinc sources.
  • Zinc can reduce absorption of tetracycline or quinolone antibiotics and penicillamine when taken too closely.

Nutrient quality

57 Moderate impact

Zinc gluconate is a useful form, but the two named matrices cannot be evaluated. A substantial zinc amount is useful, but opaque matrices make potency, safety, and formulation quality uncertain.

Ingredient transparency

34 Situational impact

Zinc is quantified, while both matrices are listed without usable amounts. Named matrices or blends conceal their component-level doses.

Customer satisfaction

65 Moderate impact

The supplied average is favorable, with moderate response volume. Complaint patterns and purpose-related experiences are not supplied.

Value for money

29 Situational impact

The asking price is difficult to justify for the disclosed formula. Serving value is weak relative to the zinc support provided.

Report analysis

Goals

Hair Health
Impact
Moderate effect
B Goal FitB Strength of SupportD- CoverageF Formula Quality
Zinc · 30 mg

Zinc gluconate supplies a substantial amount that may support follicle cell division when zinc status is low. The male-support and energy blends are undisclosed and do not establish a broader hair-health strategy.

The formula provides depth in one nutritional pathway but lacks structural proteins, biotin, vitamin D, iron, or a clearly identified hormone-targeting active. Long-term daily zinc at this amount may lower copper status because no copper is disclosed.

Study evidence
Zinc Supportive 22 studies
General Health
Impact
Moderate effect
B+ Goal FitC+ Strength of SupportD- CoverageF Formula Quality
Zinc · 30 mg

Zinc gluconate provides a meaningful foundational mineral dose that may support immune readiness and normal enzyme function. Two undisclosed support blends make the wider purpose harder to assess.

The formula is narrower than a broad daily wellness product and lacks copper for mineral balance during ongoing use. Its best fit is targeted zinc support rather than comprehensive general health coverage.

Study evidence
Zinc Supportive 60 studies

Ingredients

IngredientAmount per serving
Zinc (Zinc Gluconate)
30 mg
Male Support Matrix
0 NP
Neuro + Energy Matrix
0 NP
Men 18–50
Report overview
B+ Active Ingredient Quality & BioavailabilityA- Dose, Safety & Label TransparencyF Value

Zinc gluconate supplies an effective 30 mg amount in an organic form. The capsule delivery is suitable, but no copper is included for long-term mineral balance. Its high serving cost reflects a broader blend rather than strong zinc value.

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Sources

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

  1. Serum essential elements and muscle health in Chinese adults: a community-based study.
    Ye H; Wang D; Liu S; Yao N; Gui Z; Huang Z; Zeng Y; Liu L; Wan H; Shen J · Nutrition & metabolism · 2025
    Cross-sectional study5,389 participantsFitness forZinc
  2. Iron, zinc and magnesium nutrition and athletic performance.
    McDonald R; Keen CL · Sports medicine (Auckland, N.Z.) · 1988
    Narrative reviewFitness forZinc
  3. A comprehensive review of the physiology and evidence base to guide the use of ergogenic and medical supplements for enhanced cycling performance.
    Rowland A; Edwards S; Prieto-Bellver G; Menz B; Rowland A; Cornelisse E; Karapetis CS; Wallen MP; Hopkins AM · Journal of the International Society of Sports Nutrition · 2026
    Narrative reviewFitness forZinc
  4. 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
  5. 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
  6. 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
  7. 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
  8. 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
  9. 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
  10. 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
  11. 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
  12. 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
  13. 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