Prosta-Strong

Prosta-Strong

Irwin Naturals4.4 (1,492 ratings)
Format:Softgel Quantity: 90 Softgel(s) · 22 servings
Goals
$34.99 $1.59 per serving

Product analysis

42 out of 100

Prosta-Strong combines botanical ingredients, but most preparations are unspecified, making their contributions hard to judge. Saw palmetto has limited support for some hair thinning, and the preparation here cannot be matched confidently to those findings.

AI assessment of the formula, label and price. How scoring works

Nutrient Quality20

Most ingredient preparations are unspecified, limiting a meaningful quality comparison. Incomplete identification of some ingredients and blend contents adds uncertainty.

Ingredient Transparency63

Most listed quantities are disclosed, but nearly all forms are unspecified. Some mixtures have clear composition details, while an oil blend and an incompletely identified entry remain unclear.

Value For Money39

The stinging nettle contribution offers weak value for the serving price. Value remains uncertain for much of the formula, limiting a reliable judgement of the whole combination.

Customer Satisfaction76

Customer feedback is positive across a substantial number of ratings. The review volume helps establish a satisfaction pattern without showing specific health benefits.

Product Focus28

The possible hair-related role of saw palmetto depends on its preparation, which is not sufficiently identified. A broad ingredient mix and unresolved blend contents make the formula less focused.

Format
Softgel
Container
90 Softgel(s)
Per serving
$1.59
Customer rating
4.4 · 1,492 ratings
Report analysis

Goals

Hair Health
Impact
Moderate effect
D Ingredient FitF PathwaysA EvidenceA+ Formulation Logic
Vitamin D · 0.7 mcgZinc · 11 mg

Saw palmetto may help with some forms of hair thinning, but the preparation matters. The material here isn't identified as one of the specific extracts associated with improved hair counts. Its declared amount doesn't resolve that difference, and the possible benefit doesn't extend automatically to every cause of hair loss.

How this product is rated for Hair Health

Ingredient fit47

Saw palmetto's possible benefit concerns particular preparations and types of hair thinning; generic material isn't interchangeable with those preparations.
Goal fit
Saw palmetto's possible benefit concerns particular preparations and types of hair thinning; generic material isn't interchangeable with those preparations.
Dose adequacy
One serving provides Saw Palmetto 320 mg; Zinc 11 mg. These serving amounts don't establish an effective hair-loss regimen.

Pathways16

Normal nutrient functions or proposed biological pathways don't by themselves establish improved hair growth. The practical benefit depends on the ingredient, preparation and cause of hair loss.
Depth
Saw palmetto relates to androgen signalling, but that connection doesn't prove benefit for every hair-loss cause.
Breadth
Several biological connections don't establish several independent hair benefits or a combined regrowth effect.

Evidence91

The saw palmetto declaration doesn't identify the specific extract associated with hair-count benefits.
Evidence strength
Saw palmetto's possible benefit concerns particular preparations and types of hair thinning; generic material isn't interchangeable with those preparations.
Studied preparation
The saw palmetto declaration doesn't identify the specific extract associated with hair-count benefits.

Formulation logic100

No required ingredient partner or particular conflict is identified. Serving amounts alone don't establish an individual hair response.
Partner coverage
No required partner is missing for the relevant ingredients.
Conflicts
No particular conflict between the listed ingredients is identified.
Effective doses
One serving provides Saw Palmetto 320 mg; Zinc 11 mg. These serving amounts don't establish an effective hair-loss regimen.
Study evidence
Vitamin D Disputed 34 studies
Zinc Supportive 22 studies

Ingredients

IngredientAmount per servingScore
Calories
30 Calorie(s)
Total Fat
2.5 Gram(s)
Saturated Fat
0.5 Gram(s)
Cholesterol
10 mg
Total Carbohydrates
1 Gram(s)
Protein
1 Gram(s)
Vitamin D
0.7 mcg
Zinc (Zinc Picolinate)
11 mg
Fish Oil
2028 mg 6
Fatty Acids
608.4 mg
Saw Palmetto extract
320 mg 80
Fatty Acids
272 mg
Graminex flower pollen extract
200 mg
Quercetin
200 mg
Stinging Nettle extract
100 mg 74
Pygeum extract
50 mg
Phytosterols
6.5 mg
Green Tea extract
40 mg 28
Polyphenols
20 mg
Pumpkin extract
24 mg
Fatty Acids
6 mg
Lyc-O-Mato Tomato extract
20 mg
Lycopene
1.2 mg 70
Beta-Sitosterol
6 mg
BioPerine Complex
6 mg
Bioperine Black Pepper extract (Piperine)
0 NP
Ginger extract (Gingerols)
0 NP
Adults 18–50 Women
Report overview
A+ Composition And Label DisclosureC Composition And Label Disclosure
Each serving lists 320 mg of saw palmetto extract. The preparation also has a stated fatty-acid content of 85%, which adds detail for comparison.
How this ingredient is rated

Composition and Label Disclosure100

The saved facts report 85% fatty acids for the saw palmetto extract; that is a composition claim for the preparation.
Marker and Preparation Disclosure
The saw palmetto extract is stated to contain 85% fatty acids.

Composition and Label Disclosure60

The individually listed 320 mg per serving refers to saw palmetto extract, allowing its preparation amount to be compared.
Amount and Label Disclosure
The serving individually lists 320 mg of saw palmetto extract.

Commercial Price and Usability

A price assessment was not included for this ingredient.
B+ Composition And Label DisclosureA+ Composition And Label DisclosureF Commercial Price And Usability
Each serving provides 100 mg of stinging nettle leaf extract. A whole-product serving costs about $1.56.
How this ingredient is rated

Composition and Label Disclosure80

The nettle is identified as leaf. Nettle is identified as an extract; further preparation detail is not available in the supplied facts.
Root or Leaf Identity Disclosure
The nettle is identified as leaf.
Nettle Preparation and Marker Detail
Nettle is identified as an extract; further preparation detail is not available in the supplied facts.

Composition and Label Disclosure100

The serving lists 100 mg of stinging nettle leaf extract.
Nettle Amount Disclosure
The serving lists 100 mg of stinging nettle leaf extract.

Commercial Price and Usability10

A whole-product serving costs about $1.56.
Selected-Serving Price Comparison
A whole-product serving costs about $1.56.
Lycopene · 1.2 mg OverallScore70
A+ Composition And Label DisclosureF Commercial Price And Usability
A serving provides 1.2 mg of lycopene. Based on the whole-product price, 10 mg of lycopene works out to about $12.96.
How this ingredient is rated

Composition and Label Disclosure

No separate source or delivery criteria were evaluated for lycopene.

Composition and Label Disclosure100

The amount of lycopene is specified for the selected serving.
Declared Active Lycopene Amount
A serving lists 1.2 mg of lycopene.

Commercial Price and Usability10

The whole-product price works out to about $12.96 per 10 mg of lycopene.
Whole-Product Cost per 10 mg Declared Active Lycopene
The whole-product price works out to about $12.96 per 10 mg of lycopene.
Report alternatives

Sources

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

  1. The Safety and Efficacy of a Proprietary Bioactive Fatty Acids Extract From Saw Palmetto (Serenoa repens) for Promoting Hair Growth and Reducing Hair Loss in Adults With Self-Perceived Thinning Hair: 90-Day Results.
    Ablon G · Journal of cosmetic dermatology · 2025
    Randomized trial60 participantsHair Health forSaw Palmetto
  2. Effects of dietary supplements on androgenetic alopecia: a systematic review and network meta-analysis.
    Zhou L; Zhu W; Chen Y · Frontiers in nutrition · 2026
    Meta-analysis1,658 participants19 studies pooledHair Health forSaw Palmetto
  3. The Safety and Efficacy of a Novel Saw Palmetto (Serenoa repens) Extract for Promoting Hair Growth in Adults With Self-Perceived Thinning Hair: 180-Day Results.
    Ablon G · Journal of cosmetic dermatology · 2026
    Randomized trial60 participantsHair Health forSaw Palmetto
  4. Beyond Minoxidil: Off-Label Therapies for Male Androgenetic Alopecia-A Systematic Review with Network Meta-Analyses.
    Gupta AK; Compton SAH; Liddy A; Talukder M; Wang T; Bamimore MA · Medicina (Kaunas, Lithuania) · 2026
    Meta-analysis50 participants23 studies pooledHair Health forSaw Palmetto
  5. Comparitive effectiveness of finasteride vs Serenoa repens in male androgenetic alopecia: a two-year study.
    Rossi A; Mari E; Scarno M; Garelli V; Maxia C; Scali E; Iorio A; Carlesimo M · International journal of immunopathology and pharmacology · 2013
    Non-randomized trial100 participantsHair Health forSaw Palmetto
  6. 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
  7. 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
  8. 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
  9. 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
  10. 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
  11. 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
  12. 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
  13. 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
  14. 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
  15. 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