这件事情警告了我：我该减肥了 地道英文怎么说？

She ought to slim.
她应该减肥。
I'm trying to lose weight.
我正想减肥。
Food Firms Take on Dr. Atkins
食品公司挑战减肥宗师
They all wanted to reduce their weight.
他们都想减肥。
She said she was banting.
她说她在节食减肥。
Mary prefers not to be on a diet.
玛丽宁愿不吃减肥食谱。
She had to train hard to lose weight.
她得努力锻炼来减肥。
She is starving herself trying to lose weight.
她在饿肚子减肥。
My mother went on a diet by exercising every day.
我妈妈每天通过锻炼减肥。
FTC Targets Deceptive Diet Ads
言语夸大内容虚假减肥广告误区亟需治理

it rings an alarm to me, I got to start a diet now.

or

It is a warning for me, I need to control my weight.

This matter had warned me: I should lose weight

I need to lose fat.