Sure but you know how you look at science from 100 years ago and you realise a lot of things were wrong? The scientific method ensures we approach the truth bit

Sure but you know how you look at science from 100 years ago and you realise a lot of things were wrong? The scientific method ensures we approach the truth bit by bit, but doesn't prevent misteps or partial information. So one can be more sure about some things than others. A calorie is a calorie is more "fundamental" science than "is eating an orange the same as eating a pill", so I trust that more. Because the fact of the matter is that some % of the things we know of today as true science will be proven false later, since that has happen since the dawn of time, and it's hard to know which ones.