A Sydney chef has hit out at picky diners' dodgy allergy claims, telling them to "sort your s*** out" because they are making eating out too difficult for people with real food aversions.

Queen Chow head chef Patrick Friesen aired his gripe on his Instagram account, claiming many were using allergies as an excuse to order customised meals.

He shared an image of a ticket loaded with spurious claims of gluten and shellfish allergies alongside orders for fried rice and seafood.

View photos Award winning chef Patrick Friesen said his mother's legitimate gluten allergy led to his anger with the fakers. Photo: Instagram More

"Can people with dietary requirements start knowing what you can and can’t eat?" Friesen wrote.

"Shellfish allergy but loves oyster sauce.









"Gluten free but loves gluten as long as it’s not a piece of bread.

"Vegetarians that love a chicken wing. Pescatarians who eat chicken. Sort your s** out and let your waiter know.

"You make it really damn hard for people with actual allergies and dietaries to go out to eat."

View photos

Friesen told the Daily Telegraph he was prompted to speak out because his mother had a real gluten aversion as a coeliac disease sufferer.

An allergy expert told the paper diner's using false allergies as excuses to demand customised meals could be a danger to those with legitimate problems because it could lead to complacency in the kitchen.

When confronted with allergic customers, chefs and restaurant staff are expected to be extremely careful to avoid letting the ingredients in question come into any contact with any other food or equipment.