| Buffered C 2500 mg Powder | DC | 1450 mg | — | Powder |
| Ester C Powder 2500 mg | DC | 1450 mg | — | Powder |
| Rose Hips | Nature's Sunshine | 1120 mg | — | Capsule |
| Chewable Acerola Plus Natural Vitamin C 100 mg Natural Berry Flavor | American Health | 656 mcg | — | Tablet or Pill |
| Chewable Acerola C 100 mg Sweet & Tangy Berry Flavor | Puritan's Pride | 656 mcg | — | Other (e.g. tea bag) |
| Rose Hips 500 mg | Swanson Premium Brand | 500 mg | — | Capsule |
| Rose Hips 450 mg | TerraVita Premium Collection | 450 mg | — | Capsule |
| Cranberry | Oregon's Wild Harvest | 340 mg | — | Capsule |
| Vitamin C Natural Orange Flavor | Mr. Gummy Vitamins | 260 mg | — | Gummy or Jelly |
| Liquid C 500 mg Orange Flavor | Village Vitality | 250 mg | — | Liquid |
| Vitamin C Orange Flavor | BIOVEA | 250 mg | — | Liquid |
| Vitamin C with Rose Hips | Nature's Way | 200 mg | — | Capsule |
| T10 To T11 Kdy | Chiro-Zyme | 150 mg | — | Capsule |
| Mega Vita-Min | DC | 150 mg | — | Other (e.g. tea bag) |
| CMPRS | Loomis Enzymes | 150 mg | — | Capsule |
| Vitamin C 1,000 mg Plus Rose Hips | VitaCeutical Labs | 150 mg | — | Tablet or Pill |
| Vitamin C 1,000 mg plus Rose Hips | Woodstock Vitamins | 150 mg | — | Tablet or Pill |
| Vitamin C 1,000 mg Plus Rose Hips | Woodstock Vitamins | 150 mg | — | Tablet or Pill |
| C-3000 Complex | MBi Nutraceuticals | 125 mg | — | Powder |
| Vitamin C 1000 mg with Rose Hips Sustained Release | Bronson | 105 mg | — | Tablet or Pill |
| Mark X | DC | 100 mg | — | Tablet or Pill |
| Super C Complex | NaturesPlus | 100 mg | — | Tablet or Pill |
| Vitamin C-1000 mg & Rose Hips | Bluebonnet | 100 mg | — | Capsule |
| Whole-Food Complex with added Multivitamin plus Vital Minerals | Dr. Mercola | 100 mg | — | Tablet or Pill |
| Ultra Preventive IX With Vitamin K | Douglas Laboratories | 100 mg | — | Tablet or Pill |
| Ultra Preventive IX | Douglas Laboratories | 100 mg | — | Tablet or Pill |
| Herbal Detox Drops | Swanson | 86.5 mg | — | Liquid |
| Multi-Vita Softgels | Nature's Truth | 80 mg | — | Softgel Capsule |
| TRCTN | Loomis Enzymes | 80 mg | — | Capsule |
| Vitamin C 500 mg With Rose Hips | Solgar | 75 mg | — | Tablet or Pill |
| High Potency Multi Pack | Vitamer Laboratories | 70 mg | — | Other (e.g. tea bag) |
| High Potency Multi Pack | VitaCeutical Labs | 70 mg | — | Other (e.g. tea bag) |
| Vitamin C & Rosehip Bioflavonoids | NutraBio | 65 mg | — | Capsule |
| Vitamin C With Rosehips 1000 Milligrams | NutraBio | 65 mg | — | Capsule |
| Vitamin C 1000 mg with Rose Hips | Solgar | 62.5 mg | — | Tablet or Pill |
| Vitamin C with Rose Hips 1000 mg | Dr. Clark Store | 60 mg | — | Capsule |
| Quercetin Complex | Puritan's Pride | 50 mg | — | Capsule |
| Vitamin C | NutraChamps | 50 mg | — | Capsule |
| Immune Support Pack | Douglas Laboratories | 50 mg | — | Other (e.g. tea bag) |
| Longevity Support Pack | Douglas Laboratories | 50 mg | — | Other (e.g. tea bag) |
| C1000 | Genestra Brands | 50 mg | — | Tablet or Pill |
| Vitamin C-500 mg & Rose Hips | Bluebonnet | 50 mg | — | Capsule |
| From the Earth | The Vitamin Shoppe | 50 mg | — | Tablet or Pill |
| Mark V | DC | 50 mg | — | Tablet or Pill |
| Bone Health Pack | Douglas Laboratories | 50 mg | — | Other (e.g. tea bag) |
| Memory Pack | Douglas Laboratories | 50 mg | — | Other (e.g. tea bag) |
| C-Max 1500 mg | Douglas Laboratories | 50 mg | — | Tablet or Pill |
| OC-Max | Physician's Signature | 50 mg | — | Other (e.g. tea bag) |
| Diabetes Advanced Support Packs | DC | 50 mg | — | Other (e.g. tea bag) |
| Vitamin C with Rose Hips 1000 mg | BIOVEA | 50 mg | — | Tablet or Pill |
| Cardioplex | Nutri-West | 50 mg | — | Tablet or Pill |
| Vitamin C 1,000 mg Plus Rose Hips | Vitamer Laboratories | 50 mg | — | Tablet or Pill |
| C 500 mg with Rosehips | Natural Grocers by Vitamin Cottage | 50 mg | — | Capsule |
| Vitamin C-500 mg Plus Rose Hips | Bluebonnet | 50 mg | — | Capsule |
| Senior Women's Pack | Douglas Laboratories | 50 mg | — | Other (e.g. tea bag) |
| Week Four: Repair | Douglas Laboratories | 50 mg | — | Other (e.g. tea bag) |
| Vitamin C 500 mg with Rose Hips Sustained Release | NaturesPlus | 50 mg | — | Tablet or Pill |
| BP Pack | Douglas Laboratories | 50 mg | — | Other (e.g. tea bag) |
| Vitamin C 1000 mg | Schiff | 40 mg | — | Tablet or Pill |
| Tru-C BioComplex | NOW | 40 mg | — | Capsule |
| C 500 mg with Rose Hips | 21st Century | 37 mg | — | Tablet or Pill |
| Vitamin C 1500 mg with Rose Hips | Solgar | 30 mg | — | Tablet or Pill |
| Vitamin C 1500 mg With Rose Hips | Solgar | 30 mg | — | Tablet or Pill |
| Stress Pack | NeoLife | 30 mg | — | Other (e.g. tea bag) |
| Vitamin C | Bodybuilding.com Signature | 30 mg | — | Tablet or Pill |
| C-Time 1000 Timed Release | Puritan's Pride | 25 mg | — | Other (e.g. tea bag) |
| Vitamin C with Citrus Bioflavonoids & Rose Hips | AN Amazing Nutrition Amazing Formulas | 25 mg | — | Capsule |
| Advanced Colon Cleanser | Puritan's Pride | 25 mg | — | Capsule |
| C-600 Formula with Rose Hips | Altrum | 25 mg | — | Tablet or Pill |
| Vitamin C 500 mg | Schiff | 25 mg | — | Tablet or Pill |
| Skin Support Pack | Douglas Laboratories | 25 mg | — | Other (e.g. tea bag) |
| Vitamins To Go! Maximum | Sundown Naturals | 25 mg | — | Other (e.g. tea bag) |
| Vitamin C Complex 500 mg | tnvitamins | 25 mg | — | Tablet or Pill |
| Timed Release C-1000 mg | Vitamin World | 25 mg | — | Other (e.g. tea bag) |
| Ultimate B+C Complex | Solgar | 25 mg | — | Tablet or Pill |
| Colon Cleanser | Vitamin World | 25 mg | — | Capsule |
| Advanced Detoxapure Colon Cleanser | Vitamin World | 25 mg | — | Capsule |
| Healthy Aging Multi | Vitamer Laboratories | 25 mg | — | Tablet or Pill |
| Super Quercetin | Bluebonnet | 25 mg | — | Capsule |
| Buffered Vitamin C 500 mg | Schiff | 25 mg | — | Tablet or Pill |
| Met-A-SynX-Pack | Douglas Laboratories | 25 mg | — | Other (e.g. tea bag) |
| Vitamin C With Rose Hips 500 mg | The Vitamin Shoppe | 25 mg | — | Tablet or Pill |
| Formula 903 | DC | 25 mg | — | Tablet or Pill |
| C 1000 mg With Rose Hips | Nature's Bounty | 20 mg | — | Other (e.g. tea bag) |
| Vitamin C With 20 mg Rose Hips Orange | Nutrition Now | 20 mg | — | Gummy or Jelly |
| Softgel Multi | VitaCeutical Labs | 20 mg | — | Softgel Capsule |
| Rose Hips C Natural E | DC | 20 mg | — | Capsule |
| Ginger Immunity+ | Angry Supplements | 20 mg | — | Capsule |
| Vitamin C & D3 | Nature's Bounty | 20 mg | — | Softgel Capsule |
| C-1000 mg | Vitamin World | 20 mg | — | Other (e.g. tea bag) |
| C-1000 mg | Puritan's Pride | 20 mg | — | Other (e.g. tea bag) |
| Softgel Multi | Vitamer Laboratories | 20 mg | — | Softgel Capsule |
| High Potency Vitamin C 1000 mg | Sundown Naturals | 20 mg | — | Other (e.g. tea bag) |
| Vitamin C Gummy Vitamins | Nutrition Now | 20 mg | — | Gummy or Jelly |
| Vitamin C 1000 mg | Good State | 20 mg | — | Capsule |
| Active-C with Bioflavonoids 500 mg | The Vitamin Shoppe | 20 mg | — | Tablet or Pill |
| Vitamin C & E | Nature's Bounty | 20 mg | — | Softgel Capsule |
| Active-C with Bioflavonoids 1000 mg | The Vitamin Shoppe | 20 mg | — | Tablet or Pill |
| C-500 mg with Wild Rose Hips & E-180 mg (400 IU) | Puritan's Pride Premium | 20 mg | — | Softgel Capsule |
| C 500 mg & E 400 IU | Spring Valley | 20 mg | — | Softgel Capsule |