Hazelnut seems to be safe for most people in food amounts. But some people are allergic to hazelnuts and have had serious allergic reactions including life-threatening breathing problems (anaphylaxis). Hazelnuts have also been associated with one reported outbreak of botulism from contaminated yogurt.

Why are hazelnuts bad for you?

However, hazelnuts contain phytic acid, which has been shown to impair the absorption of some minerals, like iron and zinc, from the nuts ( 3 ). Summary Hazelnuts are a rich source of vitamins and minerals like vitamin E, manganese and copper. Additionally, they have a high content of omega-6 and omega-9 fatty acids.

Is it OK to eat hazelnuts everyday?

Lowering cholesterol

The researchers concluded that the best way to reap hazelnuts' health benefits was to eat them every day, without increasing a person's overall calorie intake. Results of a 2016 review likewise indicated that hazelnuts could reduce levels of harmful cholesterol.