King Nitric Oxide by Top Shelf

95/100

This product looks safe

Vitamin D3: 0.125mg is 1.2× the Tolerable Upper Intake Level (0.1mg)
29% of ingredients have research evidence

C Label Compliance Grade

What the Evidence Says

✨ AI-generated · Qwen 3.6 · methodology

L-Citrulline and Nitrosigine have strong evidence for increasing nitric oxide levels to support blood flow. Vitamin C and D3 contribute to immune function and general health, while Cistanche tubulosa has limited research regarding its effects. The overall evidence coverage for this specific formulation is low.

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

Alerts

Safety Alerts

Vitamin D3: 0.125mg is 1.2× the Tolerable Upper Intake Level (0.1mg)

Label

Product Label

Open Full PDF View on NIH DSLD →

Details

Label Data

4 Capsule(s)

Serving Size

Servings

Other Combinations

Product Type

29%

Evidence Coverage

Ingredients

Supplement Facts — Evidence Check

Vitamin C

200 mg (222% DV)

Vitamin D3

125 mcg (625% DV)

Exceeds UL by 1.2× (UL: 0.1 mg) 608 studies (A:16, B:251)

L-Citrulline

1000 mg

Market median: 2000.0mg (275 products)

Nitrosigine

750 mg

Cistanche tubulosa Stem Extract

500 mg

Setria

100 mg

Menaquinone-7

100 mcg

Within RDA (0.8× RDA) 275 studies (A:9, B:175)

Other Ingredients

Hypromellose Magnesium Stearate Silicon Dioxide Microcrystalline Cellulose

Claims

Label Claims — Verification

Unverified All Other

Unverified Structure/Function

Info

Product Information

Formulation Notes

More size / More blood flow / Less fatigue Science backed 2-in-1 performance Commitment to quality

GMP Certified Third-party Tested Premium ingredients

Additional Information

Viral on Tiktok Your kingdom will come

Metadata

Product Details

DSLD Entry Date2025-01-23

Product TypeOther Combinations

FormCapsule

BrandTop Shelf

DSLD ID321883

Data Updated2026-04-11

Research

Research Evidence

371

Research Sources

Avg Quality

148

Meta Analysis

Systematic Review

Rct

Clinical Trial

Regulatory Source

Cochrane Review

Narrative Review

Other

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.