Oily fish once a week can significantly reduce your chances of developing heart disease due to the omega 3 fatty acids. In the case of tuna this only goes for fresh tuna steak, not the tinned variety. Tuna is also rich in the amino acid tryptophan, which is known to play a role in the production of the “happy hormone” seratonin. In turn tryptophan has been seen to help reduce sleep disturbance, agressive behaviour, stress and depression.

Please note that tuna can contain heavy metals, in particular methyl mercury. I would suggest pregnant and breastfeeding women to eat other fish during this period, and for others to eat it no more than once/week. Tuna steak can absolutely be part of a healthy, balanced diet.

  • Paleo
  • Source of omega 3


  • 2 tuna steaks
  • 2 celery sticks
  • 5cm chunk of cucumber
  • 10 cherry tomatoes
  • 5 chive stalks, chopped
  • ½ red chilli
  • ¼ avocado
  • Juice of ½ lemon and its rind
  • 1 tbsp olive oil
  • 1 tbsp apple cider vinegar


Serves 2 people

  1. First, make the relish. Start by finely chopping the celery, cucumber, tomatoes, chilli and chives. Chop the avocado too but don’t add this until the very end. Put all of the relish items in a bowl.
  2. Now make the dressing by adding the lemon juice and its rind to olive oil and the cider vinegar. Mix well with a fork. Put the dressing on the salad and set aside.
  3. For best flavour, cook the tuna on a BBQ. It should only need a few minutes on each side, depending on whether you want it well done or pink in the middle.
  4. Plate the relish first, then the tuna.