Umm.. No.
I was saying all three will be eating 0.5 cups dry and therefore all three will have:
153 cals, 27g carbs, 5g protein, 2.5g fat
What I was saing was that, as the excess volume is created by the added water - and this is calorie free - it does not alter the macronutrients of the oats you started with.
HOWEVER - those online databases do not take into account the different volumes of water or the different ways people cook the oats. They just make an asumption that everyone who cooks 0.5 cups of oats will be using the same amount of water and will cook it for the same amount of time so they all end up with the same amount of volume at the end of cooking.
So, just say person 1 has 0.33 cups of dry oats (100 cals, 18g carbs) and cooks this in 0.33 cups water so they end up with 1 cup cooked... They have, in essense, only eaten the calories that were from that 0.33 cups oats (100 cals, 18g carbs) - so this '1 cup cooked oats' = 100 cals and 18g carbs.
But, say person 2 takes 0.25 cups oats (78 cals, 14g carbs) and they cook it in 0.5 cups water, so they also end up with 1 cup cooked.. Now, they have only eaten the calories from those 0.25 cups oats (78 cals, 14g carb) so their '1 cup cooked oats' = 78 cals and 14g carbs.
Now - if the enter the data based on the DRY weight - they will calculate correct calories:
person 1 will eat 0.33 cups dry = 100 cals
person 2 will eat 0.25 cups dry = 78 cals
BUT - if they were to enter their 'cooked weight' then both would enter 1 cup cooked oats..... So which one would be correct?
Well - if you take a look at the data at
nutritiondata.com then BOTH would end up with the wrong calorie content as nutritiondata assumes that it takes just under 0.5 cups dry oats to make 1 cup cooked!! So you can see that you get into all sorts of trouble.
So in order to avoid all that confusion - simply go off uncooked weight/volume and you will not have an issue!
I'll be measuring dry from now on! Thanks Emma!!!! 