GP explains the link between aspartame and migraines 

A type of low-calorie artificial sweetener called aspartame has hit the headlines in recent days because it is set to become classed as “possibly carcinogenic” later this month after a review by The WHO (World Health Organisation) cancer research unit. 

This classification means there is “some evidence” that it can cause cancer in humans, although the evidence is not conclusive. Used to replace sugar in around 6,000 diet foods and drinks, aspartame is an ingredient in many popular carbonated drinks and sports drinks, as well as chewing gum and some yoghurts.

But GP at LloydsPharmacy Online Doctor, Dr Neel Patel, wants to warn the public of another health impact of aspartame – migraines. 

What is aspartame? 

“Aspartame is an artificial flavouring which is more than 200 times sweeter than sugar. Popular in weight loss foods, it offers the sweet taste we crave, with fewer calories. On food labels, you may see aspartame referred to via its brand names – including Nutrasweet, Equal, and Sugar Twin.

“Aspartame is found in thousands of diet or low-calorie foods and drinks. For example, diet cola, hot chocolate powder, dessert syrups, cereal bars and salad dressings.”

What is the link between aspartame and migraines?

“It is thought there may be a link between eating and drinking food and beverages that contain aspartame and migraines. In a survey of 500 UK adults LloydsPharmacy Online Doctor conducted in March, almost one in ten said consuming products that contained artificial sweeteners like aspartame triggered migraines.”

Why can aspartame trigger migraines? 

“It is understood this may be because aspartame reduces dopamine levels. We know medications that increase dopamine levels in the brain have proven effective in reducing migraine symptoms. Therefore, as aspartame inhibits this hormone, this may explain the link.”

What can migraine sufferers do? 

“If you suffer from migraines, it might be worth considering avoiding, or at least limiting the number of foods and drinks you consume that contain aspartame.

“A helpful rule of thumb is to stick to food and drinks with minimal artificial ingredients. If you struggle to pronounce the name of an ingredient and it is not something you would find in a kitchen cupboard, there is a good chance it is an artificial additive.

“It is also a good idea to keep a food and activity journal. This can help to reveal any links between your diet and your migraines. Just record what you eat, and any migraine symptoms.

“If your migraines are particularly severe, frequent, or are getting worse, book an appointment with a doctor. They may prescribe migraine relief medication to prevent migraines and treat symptoms, helping you to get on with daily life.”