More processed - Instant oats are cooked, partially pre-digested, dried and rolled thinner, resulting in more processing that decreases fibre and nutrient content. Less fibre - The processing of instant oats removes some of the beneficial fibre found in rolled or steel-cut oats. This fibre helps regulate blood sugar levels. Higher glycaemic index - Since instant oats are more processed, they cause a quicker spike in blood sugar compared to steel cut or rolled oats. Added ingredients - Many instant oatmeal packets contain added salt, sugar, artificial flavours and preservatives, making them less healthy. Less filling - The partial pre-cooking of instant oats results in a softer, mushier texture that is less satisfying and doesn't keep you full as long. Quick cooking - While convenient, the ability to cook instant oats faster removes the benefits of slowly cooking traditional oats.