| Citrus Bioflavonoid Caps | Twinlab | 1400 mg | — | Capsule |
| Natural Citrus Bioflavonoids | DC | 1000 mg | — | Tablet or Pill |
| Citrus Bioflavonoids 1000 mg | Vitamin World | 1000 mg | — | Other (e.g. tea bag) |
| Vitamin C 1000 | Totally Products | 530 mg | — | Tablet or Pill |
| Super-C Complex | Carlson | 500 mg | — | Tablet or Pill |
| Super Pak | Beverly International | 500 mg | — | Other (e.g. tea bag) |
| NF Formulas Echinacea Vitamin C | Integrative Therapeutics | 500 mg | — | Tablet or Pill |
| Ester-C 500 mg With Citrus Bioflavoinds | American Health | 400 mg | — | Capsule |
| Ester-C 500 mg with Citrus Bioflavoinds | American Health | 400 mg | — | Capsule |
| Ester-C 500 mg with Citrus Bioflavonoids | American Health | 400 mg | — | Capsule |
| Ester-C with Citrus Bioflavonoids | American Health | 400 mg | — | Tablet or Pill |
| Ester-C 500 mg With Citrus Bioflavonoids | American Health | 400 mg | — | Capsule |
| Youthful Metabolism | Juvenon | 400 mg | — | Capsule |
| Pycnogenol 60 mg | Vitamin World | 300 mg | — | Capsule |
| Pycnogenol 30 mg | Nature's Bounty | 300 mg | — | Capsule |
| C-1000 Complex | Biophix | 250 mg | — | Tablet or Pill |
| Lung Support | SIMPLY POTENT | 250 mg | — | Capsule |
| Vitamin C 1000 mg | Spring Valley | 204 mg | — | Tablet or Pill |
| Ester-C plus 500 mg Vitamin C | Solgar | 200 mg | — | Capsule |
| Esterified C Complex | Bronson | 200 mg | — | Tablet or Pill |
| Ester-C 500 mg With Citrus Bioflavoinds Timed Release | American Health | 200 mg | — | Tablet or Pill |
| Ester-C 1000 mg With Citrus Bioflavonoids | American Health | 200 mg | — | Tablet or Pill |
| Ester-C Plus 1000 mg Vitamin C | Solgar | 200 mg | — | Capsule |
| Ester-C 1000 mg with Citrus Bioflavonoids | American Health | 200 mg | — | Tablet or Pill |
| Ester-C Plus 500 mg Vitamin C | Solgar | 200 mg | — | Capsule |
| Ultra Anti-Oxidant | Douglas Laboratories | 200 mg | — | Capsule |
| High Potency Ester-C 500 mg Vitamin C with Bioflavonoids | Equaline | 200 mg | — | Tablet or Pill |
| First Intention | Integrative Therapeutics | 150 mg | — | Capsule |
| Ester-C Powder with Citrus Bioflavonoids | American Health | 150 mg | — | Powder |
| T1 To T3 Nsl | Chiro-Zyme | 140 mg | — | Capsule |
| Respiratory Support | Fortify | 125 mg | — | Capsule |
| Ocu Complete With Lutein | VitaCeutical Labs | 125 mg | — | Capsule |
| Ocu Complete With Lutein | Vitamer Laboratories | 125 mg | — | Capsule |
| OcuGuard Plus | Twinlab | 125 mg | — | Capsule |
| Breathe Easy | Totally Products | 125 mg | — | Capsule |
| Active-C with Bioflavonoids 500 mg | The Vitamin Shoppe | 111 mg | — | Tablet or Pill |
| Liquid Multinutrient Formula Natural Tropical Fruit Flavor | Bluebonnet Super Earth | 100 mg | — | Liquid |
| Ester-C Complex | Douglas Laboratories | 100 mg | — | Capsule |
| Chelated-C Complex | Douglas Laboratories | 100 mg | — | Capsule |
| Added Protection III (Without Copper And Iron) | Douglas Laboratories | 100 mg | — | Tablet or Pill |
| Essential Basics | Douglas Laboratories | 100 mg | — | Capsule |
| Green Source | Radiance | 100 mg | — | Tablet or Pill |
| Prosta-Support Formula | Douglas Laboratories | 100 mg | — | Tablet or Pill |
| Natural C 1,000 mg | Douglas Laboratories | 100 mg | — | Tablet or Pill |
| Basic Preventive 2 (Iron and Copper Free) | Douglas Laboratories | 100 mg | — | Tablet or Pill |
| Supreme C | PureFormulas | 100 mg | — | Tablet or Pill |
| Liquid Multi Tropical Fruit Flavor | Bluebonnet | 100 mg | — | Liquid |
| Eye Health | LuckyVitamin | 100 mg | — | Capsule |
| Natural C 1000 mg | Douglas Laboratories | 100 mg | — | Tablet or Pill |
| Joint-Support Formula | Douglas Laboratories | 75 mg | — | Tablet or Pill |
| Energy/Sports Formula | Douglas Laboratories | 75 mg | — | Tablet or Pill |
| Ultra HNS | Douglas Laboratories | 75 mg | — | Capsule |
| NF Formulas Spectrum 2C With Iron | Integrative Therapeutics | 62 mg | — | Capsule |
| Spectrum 2C without Iron | Integrative Therapeutics | 62 mg | — | Capsule |
| Green Source Multi Vitamins & Minerals | Vitamin World | 60 mg | — | Other (e.g. tea bag) |
| Green Source Multivitamin & Minerals | Vitamin World | 60 mg | — | Unknown |
| Your Life Multi Green Souce | Nature's Bounty | 60 mg | — | Other (e.g. tea bag) |
| Sustained Release Vitamin C with PureWay-C 500 mg | Doctor's Best | 50 mg | — | Tablet or Pill |
| Lipotrol | Douglas Laboratories | 50 mg | — | Tablet or Pill |
| PM Formula | TriVita | 50 mg | — | Tablet or Pill |
| Able Eyes | Carlson | 50 mg | — | Softgel Capsule |
| Essential Prostate Pack | Supplement Spot | 50 mg | — | Other (e.g. tea bag) |
| Stomach Friendly Special-C 500 mg | 21st Century | 50 mg | — | Tablet or Pill |
| Green Source | DC | 50 mg | — | Tablet or Pill |
| Tyler Prenatal | Integrative Therapeutics | 50 mg | — | Capsule |
| Basic Preventive 5 (Iron Free) | Douglas Laboratories | 44 mg | — | Capsule |
| Hair, Skin and Nails Plus | Douglas Laboratories | 37.5 mg | — | Capsule |
| Tyler NutriVitamin Enzyme Complex With Iron | Integrative Therapeutics | 37 mg | — | Capsule |
| Kid Natural Fruit Flavor | Healthy 'N Fit | 30 mg | — | Other (e.g. tea bag) |
| Primal Multivitamin | Primal Harvest | 25 mg | — | Capsule |
| Mega Multi for Men | 21st Century | 25 mg | — | Tablet or Pill |
| OPC-3 Beauty Blend | Isotonix | 25 mg | — | Powder |
| Ultra Preventive Teen | Douglas Laboratories | 25 mg | — | Tablet or Pill |
| Complete Multi-Vitamin | BIOVEA | 25 mg | — | Tablet or Pill |
| Multi-100 | Country Life | 25 mg | — | Tablet or Pill |
| Vitamin C 1000 mg Timed-Release Caplets | GNC | 25 mg | — | Other (e.g. tea bag) |
| Vitamin C 1000 mg with Citrus Bioflavonoids & Rose Hips | Nature's Blend | 25 mg | — | Capsule |
| Mega Multi for Women | 21st Century | 25 mg | — | Tablet or Pill |
| OPC-3 (Oligomeric Proanthocyanidins) | Isotonix | 25 mg | — | Powder |
| Mil Adregen | Miller Pharmacal Group | 25 mg | — | Tablet or Pill |
| The 30 Day Beauty Secret | Futurebiotics | 25 mg | — | Tablet or Pill |
| Mega-One No Iron | Source Naturals | 25 mg | — | Tablet or Pill |
| C-1000 mg With Protective Bioflavonoids And Wild Rose Hips | Vitamin World | 25 mg | — | Unknown |
| Cell Protector | GNC Preventive Nutrition | 20 mg | — | Other (e.g. tea bag) |
| Whole Food Multivitamins & Minerals | Rise-N-Shine | 16.6 mg | — | Tablet or Pill |
| Enhanced Energy Whole Food Multivitamin Mango Pineapple Flavor | KAL | 15 mg | — | Tablet or Pill |
| Ultra Mega Gold without Iron | GNC Ultra Mega | 12.5 mg | — | Other (e.g. tea bag) |
| Whole Source Women's | Rite Aid Pharmacy | 10 mg | — | Tablet or Pill |
| Vitaline Total Formula 2 | Integrative Therapeutics | 10 mg | — | Tablet or Pill |
| Ultra Preventive Kids Natural Orange Flavor! | Douglas Laboratories | 10 mg | — | Tablet or Pill |
| Total Formula 3 | Integrative Therapeutics | 10 mg | — | Tablet or Pill |
| Ultra Preventive Kids Natural Grape Flavor! | Douglas Laboratories | 10 mg | — | Tablet or Pill |
| Vitamin C + D3 Chews Citrus Flavored | DNA Miracles | 8 mg | — | Other (e.g. tea bag) |
| Chewable C 500 mg Mixed Fruit | GNC | 5 mg | — | Tablet or Pill |
| Vitamin C 1000 mg with Rose Hips | Nature's Blend | 5 mg | — | Tablet or Pill |
| Vitamin C Chewable Cherry-Berry Flavor | New Sun | 5 mg | — | Tablet or Pill |
| Grape Seed 60 mgDiscontinued | NOW | 600 mg | — | Capsule |
| Super-C-ComplexDiscontinued | Carlson | 500 mg | — | Tablet or Pill |
| Ester-CDiscontinued | American Health | 400 mg | — | Tablet or Pill |
| Buffered Vitamin C-500 mgDiscontinued | Bluebonnet | 250 mg | — | Capsule |