Intake
Absorption
Your body takes nutrients into itself in addition to all the extra crap you eat. It's called your daily intake. And it gets all of those nutrients in your body through absorption.
せっしゅ
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
一日の摂取カロリーを計算してみました。
I calculated my calorie intake for one day.