go easy on
US /ɡoʊ ˈiːzi ɑn/
UK /ɡoʊ ˈiːzi ɑn/

1.
to treat someone in a gentle or lenient way, especially when you could be more severe
:
•
Please go easy on him; it's his first day.
•
The teacher told the older students to go easy on the younger ones during the game.
2.
to use or consume something in moderation
:
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You should go easy on the sugar if you want to lose weight.
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The doctor advised him to go easy on alcohol.