There is an argument that all foods are OK in moderation, and this is largely based on not having ‘being healthy’ become something that feels a chore or that has you missing out on some of the things you really enjoy. But as a nutrition professional, there are a number of things that I NEVER eat. Some of them might surprise you. In short, stick to real food as often as you can, minimal processing and do not fall for the Big Food marketing nonsense on low fat diet products. Just saying.

1 Low fat/ reduced fat foods/ diet foods

These foods are, by definition, very highly processed. Where fat is taken out of food, what nearly always goes in instead is either sugar or artificial sweeteners. The idea that fat is bad or leads to weight gain has now been acknowledged as being entirely wrong. We now know that sugars (and excess starchy carbs) are what mostly leads to weight gain and keep you craving sweet things. Many artificial sweeteners aren’t great for gut health either. I’d far rather stick to the natural, full-fat version.

2 Margarine and butter substitutes

Margarine and vegetable spreads are the nutritionally poorer relations of real butter, coconut oil and other healthy fats like olive oil. Again, they are heavily processed. Often what draws people to them is the thought that they are somehow healthier because of their lower levels of saturated fats. Given that saturated fat is not the enemy to your health – while artificially hardened vegetable oils (think trans-fats) are - it’s far better to stick to unadulterated fats, using ghee (clarified butter) and coconut oil, or olive oil for cooking at lower temperatures.

3 Sugar-free fizzy drinks, diet drinks and energy drinks

Sometimes I see clients ‘filling up’ on diet drinks, which (although they contain no actual calories) are doing your body no favours. They’re still conditioning your body to expect more sweet stuff, and the jury is still out on whether artificial sweeteners are not great or seriously detrimental to health. Energy drinks often provide a dual hit of very large amounts of caffeine accompanied by either a lot of sugar or artificial sweeteners. When I’m working with clients who are propping themselves up with these drinks, I like to get to the cause of their fatigue, because what’s in the tin of Red Bull (or similar) will not be helping.

4 Hotdogs and processed meat

It is quite shocking how little actual meat goes into hotdogs, and processed deli-style meats are often pumped with water, sugar (even if it’s not actually called sugar, look out for anything ending in ‘-ose’ – like dextrose) and preservatives. Some of the additives in processed meats have been linked to increased risk of colon cancer. If my family demand ham, it’s pretty easy to pick up a small ham joint and cook it myself.

5 Shop-bought cereals

Most supermarket cereals are filled with sugar and very high in starchy carbs, which will have your energy levels crashing come mid-morning. Better options include home-made granola (like the cinnamon pecan granola from Deliciously Ella), which are easy weekend jobs and last a good while, porridge or overnight oats, omelettes or poached eggs (in fact, any kind of eggs) on wholemeal toast.

6 Rice cakes

These are often a go-to food for anyone counting calories. Unfortunately, they will skyrocket your blood sugar levels. A better choice would be a couple of oat cakes topped with unsweetened nut butter or a little hummus.

7 Agave nectar/ syrup

Agave syrup comes from a cactus, and the syrup is made from the pulp of the leaf. It’s very highly processed and is mainly fructose, which needs to be processed by the liver, causing more stress for an already over-worked organ. Fructose is actually worse for you than glucose (which is effectively what we are talking about when discussing ‘blood sugar’). Agave syrup (or nectar) is very similar to the (deservedly) much-demonised high fructose corn syrup, that has contributed greatly to the obesity epidemic in the US. My advice? Do not use it!

8 Mycoprotein like Quorn

Quorn is a very processed food that comes from a fungus Fusarium venenatum and is fermented. It has a lot of other ingredients added – like flavourings, yeast, starches and colourings, gluten to give it the texture and flavour of meat. Lentils and pulses are a much healthier alternative if you’re after vegetarian choices.

9 Fruit Juice

The easiest way to get lots of sugar into your system in a short space of time is by drinking it. And since it comes in as a liquid, the body doesn’t register it as “eaten”, so it cunningly slips past any detectors that might otherwise signal satiety or ‘satisfaction’. Fruit juice – particularly when freshly squeezed – certainly contains lots of lovely vitamins and minerals, but it contains just as much sugar as that can of Coke. So, don’t kid yourself: fruit juice is not healthy. If you want fruit, eat fruit. Don’t drink it.