Vitamin C (Ascorbic Acid)
vitamin
Effective Dose Range (dog)
Min Effective
10 mg/kg body weight
Optimal Low
10 mg/kg body weight
Optimal High
30 mg/kg body weight
Upper Limit
50 mg/kg body weight
Research Evidence
Evidence GradeGrade B — Moderate
PubMed Studies18
Safety Data
FDA Adverse Events1
Dogs synthesize their own vitamin C, so supplementation is optional. Excess is excreted in urine. Very high doses may cause diarrhea or calcium oxalate stones.
Mechanism of Action
Cofactor for collagen synthesis supporting connective tissue. Regenerates vitamin E from its oxidized form. Enhances neutrophil function and antibody production.
Products Containing Vitamin C (Ascorbic Acid)
Top-rated supplements featuring this ingredient, ranked by our PSI+ score.
Wholistic Pet Organics Canine Complete - Organic Whole Food Supplement for Dogs
Wholistic Pet Organics
PSI+ 91.0$49.99
Zesty Paws Hip & Joint Mobility Bites Duck Flavored Soft Chews Glucosamine Supplement for Dogs
Zesty Paws
PSI+ 88.0$29.67
petnc Hip & Joint Soft Chews Joint Supplement for Dogs
PetNC
PSI+ 88.0$9.99
Zesty Paws 8-in-1 Multivitamin Bites for Dogs - Glucosamine, Chondroitin, Probiotics, Vitamins & Minerals
Zesty Paws
PSI+ 88.0$29.97
Only Natural Pet Daily Digestion & Immunity Chews for Dogs - Probiotics, Prebiotics & Vitamins
Only Natural Pet
PSI+ 88.0$25.99
Zesty Paws Mobility Bites for Dogs - Glucosamine Chondroitin for Joint Health
Zesty Paws
PSI+ 88.0$28.97
NaturVet Immune Support Plus Echinacea & Vitamin C Soft Chews for Dogs
NaturVet
PSI+ 81.0$19.99
Bark & Spark Immune Booster for Dogs - Daily Immune Support with Probiotics, Prebiotics, Turmeric, & Mushrooms - Duck Flavored Soft Chews
Bark & Spark
PSI+ 80.0$24.99