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Hair, Skin, & Nails Guard

product on market Other (e.g. tea bag) Perque Safety: 97/100
97/100

This product looks safe

  • Magnesium: 500mg is 1.4× the Tolerable Upper Intake Level (350mg)
  • Magnesium: 360mg is 1.0× the Tolerable Upper Intake Level (350mg)
  • 67% of ingredients have research evidence
D Label Compliance Grade

What the Evidence Says

✨ AI-generated · Qwen 3.6 · methodology

This formula contains Biotin and Vitamin C, which have moderate evidence for supporting keratin and collagen production in skin and hair. Vitamins D3 and K provide essential support for bone and cardiovascular health. Overall, the evidence coverage for this specific combination is limited, though the profile maintains a high safety score.

AI-generated summary based on research evidence. Not medical advice.

Alerts

Safety Alerts

Magnesium: 500mg is 1.4× the Tolerable Upper Intake Level (350mg)

Magnesium: 360mg is 1.0× the Tolerable Upper Intake Level (350mg)

Label

Product Label

Label for Hair, Skin, & Nails Guard
Open Full PDF View on NIH DSLD →
Details

Label Data

4 Tabsule(s)
Serving Size
30
Servings
Other Combinations
Product Type
67%
Evidence Coverage
Ingredients

Supplement Facts — Evidence Check

Vitamin C
200 mg (330% DV)
10 mcg (100% DV)
Within RDA (0.7× RDA) 608 studies (A:16, B:251)
750 mcg (937% DV)
6.2× RDA — above typical dose 275 studies (A:9, B:175)
250 mcg (312% DV)
2.1× RDA — within safe limits 275 studies (A:9, B:175)
2.5 mg (830% DV)
83.3× RDA — above typical dose 27 studies (A:0, B:11)
Calcium
250 mg (25% DV)
500 mg (125% DV)
Exceeds UL by 1.4× (UL: 350 mg) 316 studies (A:8, B:159)
10 mg (100% DV)
Within RDA (0.9× RDA) 263 studies (A:6, B:134)
11 mg (550% DV)
4.8× RDA — above typical dose (UL: 11 mg) 9 studies — no high-quality reviews
50 mcg (42% DV)
1.4× RDA — within safe limits 199 studies (A:1, B:55)
250 mcg (357% DV)
4.5× RDA — above typical dose (UL: 0.4 mg) 173 studies (A:0, B:67)
1 mg (50% DV)
1.1× RDA — within safe limits 37 studies (A:0, B:11)
100 mcg (67% DV)
Within RDA (0.7× RDA) 245 studies (A:4, B:133)
150 mcg (100% DV)
Within RDA (1.0× RDA) 245 studies (A:4, B:133)
Strontium
50 mg
6 mg
Market median: 3.0mg (58 products) 3 studies — no high-quality reviews
50 mcg
Market median: 0.5mg (6 products) 1 studies (A:0, B:1)
10 mg
Market median: 108.0mg (8 products) 9 studies (A:0, B:4)
200 mg
Market median: 500.0mg (159 products)
360 mg
Exceeds UL by 1.0× (UL: 350 mg) 316 studies (A:8, B:159)
Croscarmellose
200 mg

Other Ingredients

None
Claims

Label Claims — Verification

Unverified All Other
Unverified Structure/Function
Info

Product Information

Directions for Use

Directions: As a dietary supplement, take four (4) tabsules in divided doses with meals or as directed by your health professional.

Warnings & Precautions

Keep out of reach of children.

Do not use product if the tamper-resistant shrink band around the cap or the inner seal beneath the cap appears to have been tampered with or is missing.

Warning: Pregnant and nursing mothers need to check with their health professional before taking supplements.

Formulation Notes

Uniquely Perque 100% active 100% natural 100% verified

Does not contain: Citrus, MSG, wheat, gluten, corn, starch, sugar, soy, yeast, zein, sulfates, phosphates (other than coenzymes), preservatives, casein or other milk derivatives. NO GMO's; NO toxic minerals or metals

Stronger, thicker nails; lustrous, vibrant hair; smoother, softer skin

Full disclosure label (no hidden or inactive ingredients)

V (Vegetarian)

Additional Information

Must be stored with cap on tightly in a cool, dry place.

Metadata

Product Details

DSLD Entry Date2020-12-26
Product TypeOther Combinations
FormOther (e.g. tea bag)
BrandPerque
DSLD ID240760
Data Updated2026-04-11
Research

Research Evidence

371
Research Sources
54
Avg Quality
148
Meta Analysis
82
Systematic Review
71
Rct
62
Clinical Trial
2
Regulatory Source
1
Cochrane Review
1
Narrative Review
1
Other
1
Openfda Safety
A Vitamin C supplementation in pregnancy
Meta Analysis The Cochrane database of systematic reviews 2015 PubMed DOI
A Vitamin C supplementation for the primary prevention of cardiovascular disease
Systematic Review The Cochrane database of systematic reviews 2017 PubMed DOI
A Vitamin C for preventing and treating the common cold
Meta Analysis The Cochrane database of systematic reviews 2013 PubMed DOI
A Vitamin C for preventing and treating pneumonia
Meta Analysis The Cochrane database of systematic reviews 2013 PubMed DOI
A Vitamin E supplementation in pregnancy
Meta Analysis The Cochrane database of systematic reviews 2015 PubMed DOI
A Vitamin C supplementation for prevention and treatment of pneumonia
Meta Analysis The Cochrane database of systematic reviews 2020 PubMed DOI
A Vitamin C supplementation for prevention and treatment of pneumonia
Systematic Review The Cochrane database of systematic reviews 2021 PubMed DOI
A Nutritional interventions for preventing and treating pressure ulcers
Meta Analysis The Cochrane database of systematic reviews 2024 PubMed DOI
A Does Vitamin C Supplementation Provide a Protective Effect in Periodontal Health? A Systematic Review and Meta-Analysis
Meta Analysis International journal of molecular sciences 2024 PubMed DOI
A Circulating vitamin C concentration and risk of cancers: a Mendelian randomization study
Meta Analysis BMC medicine 2021 PubMed DOI
View all evidence for Vitamin C →
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This product page is for informational purposes only and does not constitute medical advice. Always consult your healthcare provider before taking any supplement.