Pets Depot AIAI pet wellness
Guinea pig · Guide
Why do guinea pigs need vitamin C?
Guinea pigs are one of the few mammals that cannot synthesise their own vitamin C. Without a daily dietary source they develop scurvy. They need roughly 10–30 mg per day, from vitamin-C fortified pellets and fresh vegetables. This is genuinely essential, not an optional supplement.
What happens without it
Scurvy in guinea pigs presents as reluctance to move, a rough coat, swollen or painful joints, bleeding gums, and poor healing. It develops within weeks of deficiency and is fatal if untreated.
It's also entirely preventable, which is what makes it one of the more frustrating conditions vets see in guinea pigs.
Where the vitamin C should come from
Vitamin-C fortified guinea pig pellets are the reliable base — but the vitamin degrades over time, so check the bag date and store it cool and dark rather than buying in bulk.
Fresh vegetables add to it: bell pepper is exceptionally high, along with leafy greens. A small daily portion covers a lot of the requirement.
Avoid vitamin C drops added to water. The vitamin degrades quickly in water, it makes intake impossible to measure, and it often puts guinea pigs off drinking altogether.
The rest of the diet
Unlimited grass hay is the base of a guinea pig's diet — it's essential for both digestion and for wearing down continuously growing teeth. Pellets and vegetables sit alongside it, not in place of it.
Check your own pet — freeSnap a few photos, get a wellness score in minutesA wellness check, not a diagnosis — and never a replacement for your vet. If something seems wrong with your animal, see a veterinarian.
Common questions
How much vitamin C does a guinea pig need daily?
Roughly 10–30 mg per day, more if unwell or pregnant. Fortified pellets plus fresh vegetables such as bell pepper generally cover it.
Can I put vitamin C drops in my guinea pig's water?
Not recommended. It degrades quickly in water, can't be measured reliably, and may discourage drinking.
What are the signs of scurvy in guinea pigs?
Reluctance to move, rough coat, swollen joints, bleeding gums and poor healing. It requires prompt veterinary treatment.