Guinea Pigs
Guinea pigs cannot synthesize their own vitamin C and are obligate herbivores, so diet must be high-fiber, low-sugar, and vitamin-C rich.
8 foods reviewed for Guinea Pigs
Toxicology Profile
Vitamin C Dependency
Guinea pigs lack L-gulonolactone oxidase and cannot synthesize ascorbic acid. Without 10–30 mg/day from food, scurvy develops within 2–3 weeks — causing hemorrhaging joints, loose teeth, and immune collapse.
Oxalate & Kidney Stone Risk
High-oxalate foods (spinach, parsley, beet greens, rhubarb) bind calcium in the urinary tract. Chronic feeding creates painful kidney and bladder stones that can be life-threatening.
Cecal Microbiome Fragility
Alliums, onions, and many essential oils act as antimicrobials inside the cecum, decimating the bacterial colonies guinea pigs need for fermentation and nutrient extraction, causing fatal enteritis.
Most At-Risk Systems
Most Dangerous Foods
All 8 Reviewed Foods
Showing 4 of 8 foods
Clear FiltersAsparagus
Asparagus is safe for guinea pigs in moderate amounts and provides useful nutrients including vitamin C, which guinea pigs cannot synthesize on their own. There are no toxic compounds in asparagus that pose a clinical risk to this species. Like any vegetable, overfeeding can cause digestive upset, so portion size matters.
Bell Peppers
Bell peppers are an excellent food for guinea pigs. They are packed with vitamin C, which guinea pigs cannot make themselves, and are low in sugar, oxalate and calcium.
Cucumber
Cucumber is a safe, hydrating vegetable for guinea pigs and can be offered regularly as part of a varied diet. It contains no compounds toxic to cavies, and most guinea pigs find it highly palatable. Overfeeding can cause loose stools due to the high water content, so moderate portion sizes are key.
Peas
Peas are a safe, nutritious treat for guinea pigs when offered in appropriate amounts. They provide useful vitamins — including vitamin C, which guinea pigs cannot synthesize on their own — along with plant-based protein and fiber. Overfeeding should be avoided due to the natural sugar and starch content, but moderate servings pose no meaningful health risk.