Organic foods can be an expensive addition to your shopping trolley – and are not always available. Further, we are still studying the impact that broad-based organic farming has on our environment. Is it really better for our soils than conventional farming? Is it a sustainable way to feed the six billion inhabitants of this planet? With these questions in mind, here is a list of the foods that we think you should buy organic (or not).

Fruits and Vegetables
The Environmental Working Group (EWG), a research organisation based in the US, has developed a list called the Dirty Dozen. These are the fruits and vegetables that tend to be doused with pesticides that are hard to wash off, or are not typically peeled to discard pesticide-laden skins. So, if you’re going to spend on organic products, try to buy the following produce: apples, peppers, celery, cherries, imported grapes, nectarines, peaches, pears, potatoes, red raspberries, spinach, and strawberries. Always wash produce thoroughly in warm water.

Dairy
Fishback recommends that you eat organic dairy foods. Non-organic dairy cows are often treated with growth hormones to produce more-than-natural quantities of milk. This can make the cows sick, so they have to be given large doses of antibiotics. As a result, the consumption of conventional milk has been associated with antibacterial resistance in humans. At the very least, purchase milk labelled “without artificial growth hormones” or “no rBGH.” Other benefits of organic milk include longer shelf life (it’ll also last longer in the fridge) and a richer taste because of the natural feed that organic cattle are fed on. It's the best way to go.

Meat and Fish
As with dairy, you minimise your exposure to growth hormones and antibiotics by choosing organic meats and poultry. However, don’t waste your money buying organic seafood. As for organic seafood, technically it doesn’t exist.

Baby Food
Since baby food is often made up of condensed fruits and vegetables, it's a potential source of concentrated pesticide residues. This means that buying organic baby food would be a very wise decision as babies’ developing systems are especially vulnerable to toxins from pesticides, as well as to hormones and antibiotics.

Packaged Food
There's no reason to buy organic cereals and snack foods unless you like the product. In fact, these foods are often not fortified with vitamins and minerals the way conventional foods are. The result: You may not get as much iron or folate, for example, from an organic cereal as you would from a non-organic equivalent.