Can dogs eat grapefruit?

Caution — flesh low-risk, peel dangerous

Grapefruit flesh isn't highly toxic but is acidic and often causes stomach upset. The peel contains psoralens and essential oils that are a bigger problem. Not worth sharing.

The full picture

Grapefruit sits in the same 'technically not acutely toxic but problematic' zone as other citrus. The flesh is extremely acidic and frequently causes vomiting, diarrhoea, and loss of appetite in dogs — even without the peel. The peel, pith, and seeds contain psoralens (photosensitising compounds) and citrus essential oils, which can cause more serious GI upset, skin irritation, and in large amounts, light sensitivity. The peel is also tough and can cause intestinal blockage in smaller dogs. Grapefruit juice, marmalade, and anything containing candied peel carry the same warnings. Safer citrus: none really — oranges and lemons share similar risks.

If your dog ate more than a safe amount

Risks to watch for

  • GI upset from acidity (vomiting, diarrhoea)
  • Peel and pith contain psoralens
  • Essential oils irritate skin and digestion
  • Peel is a choking/blockage risk

Safe portion size

None recommended. A single lick probably isn't an emergency, but there's no reason to share.

Safer alternatives

  • Blueberries
  • Apple slices (core removed)
  • Strawberries

Related foods

Oranges yes Lemons no Apples yes
Important: This page is general information, not veterinary advice. Every dog is different, and individual factors (age, breed, health conditions, medications) can change what's safe. If in doubt, always contact your vet — or the Animal PoisonLine on 01202 509000 in the UK.