🟢 100/100

This product looks safe

  • No ingredients exceed tolerable upper intake levels
  • 50% of ingredients have research evidence
A Label Compliance Grade

Product Label

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Label Data

1 Capsule(s) Serving Size
360 Servings
Other Combinations Product Type
50% Evidence Coverage

Supplement Facts — Evidence Check

Vitamin C
30 mg (33% DV)
📊 Market median: 600.0mg (7 products) 📚 39 studies (Tier A: 2, B: 13)
This product: 500mg

Other Ingredients

Gelatin Capsule

Label Claims — Verification

All Other
Structure/Function
All Other (99% of products) Structure/Function (83% of products) Nutrient (54% of products)

Target Groups

Adult (18 - 50 Years) Gluten Free Dairy Free Sugar Free

Product Information

📋 Directions for Use

Suggested Use Consume one or more capsules daily or as recommended by your physician. As with any dietary supplement, this product is most effective as part of a healthy diet and active lifestyle. For questions about the use of this product call 800.332.7799.

🧪 Formulation Notes

Detoxifying anti-oxidant Glutathione precursor

Andrew Lessman's NAC 500 delivers 500 mg of n-acetyl cysteine (NAC), an essential glutathione precursor and detoxifying antioxidant that is a uniquely active form of the conditionally essential amino acid cysteine. It is the sulfur in cysteine's "thiol" (sulfhydryl) group that imparts NAC's unique properties, including its critical role as a building block of glutathione - our body's most powerful, internally-produced protective compound. NAC offers important protection to the brain, heart and lungs, but because of its unique detoxifying role, NAC provides targeted protection to the hard working cells of the liver and kidneys making it a sensible part of any internal cleanser detoxification program. Unfortunately, NAC is not readily available from the diet and it cannot be readily produced by the body, so supplementation is a straightforward way of promoting its protective benefits.

Contains no additives or common allergens Contains no milk, soy, yeast, wheat, gluten, sodium, salt, sugar, fat, cholesterol, color, preservative, common allergens, genetically modified (GMO) ingredients or manufacturing additives.

Additional Information

For over 40 years Unsurpassed Purity, Quality and Efficacy 100% solar production Zero carbon footprint Andrew Lessman, Founder Questions? Reorders? 800.800.1200 www.ProCapslabs.com HSN www.HSN.com 800.944.9999 www.QVC.com 800.345.1515

100% solar

Product Details

UPC / SKU 385999
DSLD Entry Date 2022-10-24
Product Type Other Combinations
Form Capsule
DSLD ID 275277
Data Updated 2026-04-11

Research Evidence

371 Research Sources
54 Avg Quality Score
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
A Vitamin C supplementation for the primary prevention of cardiovascular disease
Systematic Review The Cochrane database of systematic reviews 2017
A Vitamin C for preventing and treating the common cold
Meta Analysis The Cochrane database of systematic reviews 2013
A Vitamin C for preventing and treating pneumonia
Meta Analysis The Cochrane database of systematic reviews 2013
A Vitamin E supplementation in pregnancy
Meta Analysis The Cochrane database of systematic reviews 2015
A Vitamin C supplementation for prevention and treatment of pneumonia
Meta Analysis The Cochrane database of systematic reviews 2020
A Vitamin C supplementation for prevention and treatment of pneumonia
Systematic Review The Cochrane database of systematic reviews 2021
A Nutritional interventions for preventing and treating pressure ulcers
Meta Analysis The Cochrane database of systematic reviews 2024
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
A Circulating vitamin C concentration and risk of cancers: a Mendelian randomization study
Meta Analysis BMC medicine 2021
View all evidence for Vitamin C →

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