On the surface, all those anti-nutrient-containing foods all sound super healthy – who doesn’t love spinach and sweet potatoes. So, what’s the problem? Well, for some people (particularly those with specifically diagnosed issues) some anti-nutrients can exacerbate these issues.

“Lectins may cause inflammation or cause digestive symptoms in some people,” explains Pellegrini. “Goitrogens may impact thyroid function in people with hypothyroidism or iodine deficiency. Oxalates for example may increase the risk of kidney stones, so if you have kidney stones, you may be advised to reduce foods high in oxalates.

“Tannins may inhibit the absorption of iron. That’s why the NHS recommends leaving two hours from taking an iron supplement to having tea or tannin-rich foods.”

Are anti-nutrients really as unhealthy as they sound? Experts explain why we all need them