fat in breast milk

Wow,!!! I must say, first of all my baby is 11 wks, I've breast fed him the whole time but have to supplement here and there, I noticed my milk wasn't very fatty when I pump so now I take a spoon fool of coconut oil first thing in the morning for 3 days that I've done it and now it's so fatty the bottle is all greased up and now, my baby is satisfied longer b4 almost every hr that he was hungry it felt like he was on my breast almost none stop, now he goes longer, I'm so glad I've tried bout everything to boost the supply, but it wasn't that I wasn't making enough I don't think he was just never really satisfied,. Thanks for to a (sister Inlaw)