🟢 100/100

This product looks safe

  • No ingredients exceed tolerable upper intake levels
  • 14% of ingredients have research evidence
B Label Compliance Grade

Product Label

📸

Have a supplement label? Find it here.

Upload a photo of any supplement label to search our database of 92,312 products.

Label Data

1 Veg Capsule(s) Serving Size
100 Servings
Other Combinations Product Type
14% Evidence Coverage

Supplement Facts — Evidence Check

Vitamin C
500 mg (556% DV)
Calcium
60 mg (5% DV)
Transport C-PLUS
650 mg
📊 Market median: 500.0mg (283 products) 📚 173 studies (Tier A: 0, B: 62)
This product: 100mg
Acerola, Powder
25 mg
Rose Hips, Powder
25 mg
📊 Market median: 500.0mg (19 products)
This product: 25mg

Other Ingredients

Hypromellose Microcrystalline Cellulose Stearic Acid Magnesium Stearate Silica

Label Claims — Verification

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

Target Groups

Vegan Vegetarian Adult (18 - 50 Years) Gluten Free Dairy Free

Product Information

📋 Directions for Use

Suggested usage: Take 1 capsule 1 to 3 times daily, preferably with food, or as directed by your healthcare practitioner.

⚠️ Warnings & Precautions

Cautions/interactions: Vitamin C may interact with oral estrogen medications, HMG CoA inhibitors, and blood thinning medications.

Doses of > 2000 mg Vitamin C per day may cause GI disturbances in sensitive individuals and may not be advisable for some people.

Consult your healthcare practitioner if you take any prescription medications or have a medical condition before exceeding the recommended dosage for this product.

Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish or tree nut ingredients. Produced in a GMP facility that processes other ingredients containing these allergens.

🧪 Formulation Notes

How it works: ProtoSorb C is a unique formulation featuring transport C-plus threonic acid, which has been shown to enhance uptake of vitamin C. This buffered, non-acidic vitamin C supplement also contributes alpha-lipoic acid, a free radical scavenger known to help regenerate both vitamin C and glutathione in the body. Studies suggest that Alpha-Lipoic Acid may further promote the body's utilization of Vitamin C, by activating uptake into cells via the glucose transport pathways.* Bioflavonoids also synergistically participate at the cellular level to create a well-absorbed, highly biologically available Vitamin C supplement.* Vitamin C is required for the synthesis of collagen, a structural component of blood vessels, tendons, ligaments and bone.

Buffered, Non-Acidic Enhanced Cellular Absorption

Antioxidant Protection of Vitamin C

Non-GMO

Transport C-Plus

Vegetarian/Vegan

Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish or tree nut ingredients.

Natural color variation may occur in this product.

Product Details

UPC / SKU 7 07359 10716 8
DSLD Entry Date 2025-01-23
Product Type Other Combinations
Form Capsule
DSLD ID 326470
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 →

Compare Similar Products

View all Vitamin C products →