Is Pesto Healthy?

Basil pesto in a pestle and mortar.

Despite plenty of nuances, dietitians broadly agree that, if consumed in moderation, pesto is healthy and is a great source of antioxidants, vitamins, calcium, and heart-healthy fats.

Deciding whether any food, including pesto, is healthy is never black and white

Most government advice relating to food is a blunt instrument, primarily designed to prevent hospitals from being inundated with food-poisoned patients. Complexity and context play little part in public-facing food policy. The messaging must be clear, categorical, without nuance, and understandable by everyone.

But what has this got to do with whether pesto is healthy or not? Actually, quite a lot. If you scan the barcode of a jar of supermarket pesto with an app like Yuka, it will almost certainly present you with a red traffic light warning and suggest you might want to consider a healthier alternative.

Screengrab of an app saying that sun-dried tomato pesto is unhealthy.

Is pesto's unhealthy red light really deserved?

So, does pesto really belong in the same camp as candy floss, tinned hotdogs, and pork scratchings? Well, no one can deny that pesto contains relatively large amounts of fat and salt, but without context, that fact is largely meaningless. It doesn't tell you about all the good things that are in pesto, and it doesn't take into account how much of it you are going to be eating.

How on earth can crisps be healthy and pesto unhealthy?

Raw pesto containing herbs, olive oil, cheese, and pine nuts makes it a great source of vitamins, calcium, monounsaturated fats, and antioxidants, yet the government's classification system means that some ultra-processed crisps are given a green light, and that's a dangerous message to give out.

Screengrab of an app saying that crisps are healthy.

If the public starts to believe that crisps are healthy and pesto is unhealthy, then people will simply skip the pasta aisle in favour of the crisp aisle.

Take the worst offender in that category, Pringles. Their crisps clock in at over 500 calories per 100g, contain 30% fat and all kinds of synthetic flavour enhancers such as monosodium glutamate, disodium guanylate, and disodium inosinate. Some of their wackier products contain guanylic acid, inosinic acid, annatto norbixin, and potassium chloride. In terms of real nutrition, you won't find much of it in that enticing red tube.

It won't come as any surprise that we have very little time for the UK government's HFSS (high fat, salt, and sugar) messaging. Like most food policies, its heart is in the right place, but its execution is hopelessly simplified.

After all, if salt is so bad, why don't we all live on a zero-sodium diet? (Spoiler: because you will develop the condition hyponatremia, which can be fatal.) If fat is so deadly, why do nutritionists prescribe people cod liver oil? If sugar is so awful, why are we not told to stop eating peas and bananas?

Apart from cigarettes and illegal drugs, pretty much anything we consume can be done guilt-free, provided it is done in moderation and as part of a balanced diet made up of plants, protein, complex starch, unsaturated fat, and a little dairy.

Dieticians agree that, when consumed in moderation, pesto is a healthy sauce

Our recommended portion size of 50g of pesto per person clocks in at under 200 calories, about the same as two slices of bread. Most importantly, though, it contains ingredients that are known to help with cholesterol, cardiovascular health, good skin, and cell health. We would consider that a pretty healthy sauce, wouldn't you?

It's true that eating large amounts of pesto every day can lead to weight gain. It could also introduce too much salt into your diet, which is known to contribute to high blood pressure, strokes, and heart disease. However, in moderation, it can easily grace your table once or twice a week without you having to lose any sleep over it.