It's become a go-to snack for the health-conscious looking to curb cravings, but are the new-age posh popcorns actually any good for you?The idea that popped corn is healthier than crisps is widespread, and given it's a high-fibre wholegrain in its natural form, it's not difficult to see why – but popcorn isn't made equal, and brands advertising low calories on attractive bags might not be as good for you as you think.Speaking to the Daily Mail, Ann Garry, CEO and Director of Nutrition Training at Health Coaches Academy, has revealed which of the packs are worth a purchase – and the others that are filled with unwanted nasties.She said: 'Popcorn has earned itself a health halo and up to a point, it deserves one. Corn is a wholegrain and naturally provides fibre, while popped corn can give you a satisfying volume of food for relatively few calories. However, the nutritional picture can change considerably once oil, sugar, salt, coatings and flavourings are added.''My rule in the supermarket is to check that corn is clearly the main ingredient, then compare the fibre, added sugar, saturated fat and salt. Portion size matters too, because even one of the better products can become less balanced when a sharing bag is eaten in one sitting.'And it might come as a shock to learn that, according to Ann, popcorn doesn't always trump crisps: 'This does surprise people, but a few ordinary crisps actually come out lighter, less fatty, and less salty than the heaviest popcorn bags here,' Ann said.'Popcorn isn't automatically the better choice, it really does depend on which ones you pick up.'Read on to discover which popcorns are worth a purchase and the others to avoid – plus the crisps that might be better for you than them all.