Guinea Pig Scurvy: Vitamin C Deficiency Signs and Treatment

Guinea pigs cannot synthesize vitamin C and must get it from their diet every day — making scurvy (ascorbic acid deficiency) one of the most common and entirely preventable diseases in pet guinea pigs. Signs include joint pain, poor wound healing, rough coat, and bleeding gums. Full recovery is possible with prompt supplementation.

Last reviewed: June 2026

Why Guinea Pigs Get Scurvy

Unlike most mammals, guinea pigs (cavies) lack the enzyme L-gulonolactone oxidase, which is needed to synthesize vitamin C internally. This makes them entirely dependent on dietary ascorbic acid — the same metabolic limitation that affects humans, primates, and a handful of other species.

Vitamin C is unstable in food and water: it degrades rapidly in light, heat, and even plain water. This means:

• Fresh pelleted guinea pig food that is more than 90 days old may already be depleted of vitamin C even if it looks fine
• Vitamin C added to water bottles degrades within hours in light
• Fruits and vegetables are a more reliable vitamin C source than pellets or water additives

The minimum daily requirement for guinea pigs is 10–30 mg/kg/day; higher doses (20–50 mg/kg/day) are needed during illness, pregnancy, or growth. As described in Quesenberry & Carpenter's Ferrets, Rabbits & Rodents, the most common cause of scurvy in pet guinea pigs is over-reliance on old pelleted food without fresh leafy vegetables.

Signs of Vitamin C Deficiency in Guinea Pigs

Clinical signs typically develop within 2–4 weeks of inadequate intake:

• Reluctance to move or lameness — guinea pigs with scurvy have painful, swollen joints from subperiosteal hemorrhage (bleeding under the bone's membrane)
• Tooth chattering or grinding — joint pain sign
• Rough or dull coat — poor collagen synthesis affects skin and fur
• Swollen, bleeding, or dark-colored gums
• Slow or failed wound healing — small injuries take much longer than expected
• Weight loss and loss of appetite — often because eating is painful due to gum lesions
• Petechiae — small red pinpoint hemorrhages on the gums or skin
• Hunched posture and lethargy

In guinea pigs, scurvy mimics other causes of lameness (articular disease) and is often misidentified. A dietary history is crucial.

Treatment and Recovery

Immediate vitamin C supplementation:

• Oral vitamin C: 50–100 mg/kg/day during active deficiency, given by syringe
• Fresh vegetables: red bell pepper (highest vitamin C of common vegetables), kale, parsley, broccoli — offered daily
• After recovery, maintain 10–30 mg/kg/day through fresh vegetables and fresh pellets

Pain management: Meloxicam (0.3–0.5 mg/kg twice daily) for joint pain during recovery. As noted in Plumb's Veterinary Drug Handbook, meloxicam is well-tolerated in guinea pigs and appropriate for short-term use alongside vitamin C treatment.

Recovery timeline: Joint swelling and gum lesions typically improve within 1–2 weeks of supplementation. Full recovery from established scurvy takes 2–4 weeks.

Diet reformation: Ensure pellets are fresh (under 90 days from production date), offer unlimited grass hay as the dietary base, and provide daily fresh vegetables for guaranteed vitamin C.

According to the AEMV Pet Care Guides, 2024, the best long-term prevention is at least one daily serving of fresh red bell pepper (roughly ¼ of a pepper per guinea pig), which provides more than adequate vitamin C without digestive upset.

When to See a Vet

Call your vet today if:

• Your guinea pig is reluctant to move, looks stiff, or is holding a leg up
• You notice bleeding, dark, or very swollen gums
• Your guinea pig has lost weight and appetite over the last 1–2 weeks
• Your guinea pig's coat is unusually rough or you see skin bruising or pinpoint red spots

Go to the ER immediately if:

• Your guinea pig has not eaten or drunk for more than 12 hours
• Paralysis or complete inability to use the hind limbs
• Severe bleeding from the gums or oral cavity
• Collapse or complete unresponsiveness

Frequently Asked Questions

How much does treating scurvy in guinea pigs cost? Exotic vet visit: $75–150. Basic bloodwork (to rule out infection or other causes) adds $80–150. Vitamin C supplementation costs under $10. If meloxicam is prescribed, a short course runs $20–50. Total first-episode cost is typically $150–300, making scurvy one of the most affordable conditions to treat — and entirely preventable.

Can I give my guinea pig vitamin C tablets meant for humans? Yes — plain ascorbic acid (vitamin C) tablets can be used; crush and dissolve in a small amount of water or puree it with a small amount of fruit. Chewable tablets with added sugars, artificial sweeteners (especially xylitol), or flavors should be avoided. Dedicated guinea pig vitamin C drops from a pet store are fine if used fresh and stored away from light.

How much vitamin C does a guinea pig need daily? Healthy adult guinea pigs need 10–30 mg/kg/day. A sick or deficient guinea pig needs 50–100 mg/kg/day during recovery. A small red bell pepper provides 50–200 mg of vitamin C, making it the easiest single food source to provide adequate supplementation.

Why did my guinea pig get scurvy if I feed pellets? Pellets are fortified with vitamin C at manufacture, but the vitamin degrades rapidly — within 60–90 days of the bag being milled, and even faster once opened. If fresh vegetables are not also provided, the pellet-only diet becomes vitamin C deficient quickly. Check the production date on the pellet bag, not just the expiration date.

Which foods have the most vitamin C for guinea pigs? Top sources (mg per 100g fresh weight): red bell pepper (~125 mg), parsley (~130 mg), kale (~120 mg), broccoli (~90 mg), and green bell pepper (~80 mg). Fruits like oranges work but are high in sugar; limit to small amounts.

Still Not Sure if Your Guinea Pig Needs a Vet?

When you're not sure if this is wait-and-see or call-tonight, Voyage AI Vet triages in under 2 minutes. Describe what you're seeing in chat, share photos of your guinea pig's gums, coat, and posture, or hop on a live video call if you want a second pair of eyes. Every answer comes with citations to the actual veterinary literature it's pulling from — so you see exactly where the guidance comes from, not just a chatbot's word.

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