C 250 mg®

Objective insights generated automatically from the official DSLD label — a quick, factual read of how this product is formulated and disclosed.

This analysis is generated algorithmically from label data for educational reference only. It is not a product endorsement, ranking, or medical advice.

Allergen flags are parsed automatically from the official label's claims and statements. Always verify against the physical product label before use, especially if you have a severe allergy.

Serving Size: 1 Tablet(s) · 1 per day

Not Present

• 

  21st Century C-500 Tablets

  21st-century-vitamins4.8(4500)

  $8.99
• 

  21st Century C with Rose Hips 1000 mg Caplets

  iHerb4.8(944)

  $9.99
• 

  21st Century Magnesium 250 mg Tablets

  21st-century-vitamins4.7(24000)

  $4.99
• 

  21st Century Chewable Tablets

  Target4.8(1700)

  $10.33
• 

  21st Century Zoo Friends Chewable Tablets

  21st-century-vitamins4.7(2500)

  $4.99
• 

  21st Century Prolonged Release C Tablets

  iHerb4.8(5000)

  $7.99
• 

  21st Century Niacin 100 mg Tablets

  OTC Superstore4.7(1600)

  $6.29
• 

  21st Century VitaJoy Daily C Gummies

  Hargraves Online Healthcare4.8(78)

  $8.99

Enter your city or ZIP code to find supplement & health stores in your area that may carry this product.

Showing representative supplement & health retailers — search above for stores in your area.

• Supplement Superstore

  5.0 (1306)

  Vitamin & supplements store

  7449 S Lindbergh Blvd, St. Louis, MO 63125

  Directions(314) 416-8800

• Vitamin Factory Outlet

  4.6 (34)

  Vitamin & supplements store

  75 Bi County Blvd, Farmingdale, NY 11735

  Directions(631) 542-5650

• Vitamin World

  4.8 (18)

  Vitamin & supplements store

  100 Citadel Outlet, Commerce, CA 90040

  Directions(323) 721-1197

• Supplement Superstores

  5.0 (1203)

  Vitamin & supplements store

  7344 W 135th St, Overland Park, KS 66223

  Directions(913) 402-6813

• Hundred

  4.3 (41)

  Vitamin & supplements store

  50 S Center St Ste 3, City of Orange, NJ 07050

  Directions(347) 949-0230

• Uscriptives

  4.4 (42)

  Vitamin & supplements store

  1535 W Loop S Ste 200, Houston, TX 77027

  Directions(800) 778-7191

• Supplement Superstore

  5.0 (1389)

  Vitamin & supplements store

  8420 Eager Rd, St. Louis, MO 63144

  Directions(314) 961-3935

• Supplement Superstore

  5.0 (450)

  Vitamin & supplements store

  920 NW Pryor Rd, Lee's Summit, MO 64081

  Directions(816) 434-5164

• Effect of magnesium supplementation on depression status in depressed patients with magnesium deficiency: A randomized, double-blind, placebo-controlled trial

  A Rajizadeh, H Mozaffari-Khosravi, M Yassini-Ardakani… - Nutrition, 2017 - Elsevier

  … oxide tablets on a daily basis (21st Century® Healthcare, Inc., Arizona, USA). On the other … supplement. This trial was registered in the registry of clinical trial of Health Ministry of Iran. …

  2017143 citations

• Ascorbic acid in the 21st century–more than a simple antioxidant

  HR Griffiths, J Lunec - Environmental toxicology and pharmacology, 2001 - Elsevier

  … 8-oxoA) during supplementation with 500 mg/day vitamin C in normal healthy subjects. Earlier … was to evaluate the effects of 400 mg/day vitamin C supplementation on protein oxidation, …

  2001183 citations

• The Health Delusion: How to Achieve Exceptional Health in the 21st Century

  G Matten, A Goggins - 2012 - books.google.com

  … magazines, wonder foods and supplements, surely we should be brimming with health? When it comes to conquering disease who needs more information than that to stay in tiptop …

  20126 citations

• … safety of multivitamin and mineral supplement use to prevent cancer and chronic disease in adults: a systematic review for a National Institutes of Health state-of-the …

  HY Huang, B Caballero, S Chang… - Annals of internal …, 2006 - acpjournals.org

  … of multivitamin and mineral supplements. For public health policymakers, our conclusion is … from routine use of multivitamin and mineral supplements by adults in the United States for …

  2006343 citations

• Global hotspots and trends of nutritional supplements for sick populations from 2000 to 2024

  C Shi, H Liu, T Fu, Y Li, H Zhao, F Liu - Frontiers in Nutrition, 2025 - frontiersin.org

  … The article noted that MSM has become a popular dietary supplement that improves a variety of health-specific outcome metrics, including inflammation, joint/muscle pain, oxidative …

  20252 citations

• Plants and human health in the twenty-first century

  …, N Borisjuk, A Brinker, DA Moreno, C Ripoll… - TRENDS in …, 2002 - cell.com

  … between plants and health was felt not … health organization. Although plants are slowly making a comeback in several areas of human health (ie functional foods, dietary supplements …

  20021,445 citations

Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2021-10-22. DSLD Label ID: 258318. This information is provided for educational reference only and is not medical advice. Always follow the product label and consult a doctor or pharmacist before use.