reduce their daily calorie intake to 1,500 - 1,800 calories
or
reduce their daily calorie intake by 1,500 - 1,800 calories
These are very different answers, unless you’re consuming ~3,300 calories per day. These kinds of ‘subtle’ phrasing issue often results in AI mistake as both words are commonly used in advice but the context is really important.
Oh yeah! No, reduce to not reduce by. Though at the time I was eating a few things that had high calories that I didn’t realize so it would have been the same.
Your trainer advises you to reduce your calorie intake to between 200 and 500 calories per day? [0] That sounds very, very hazardous for anything other than very short term use, and (given the body's inbuilt "starvation mode") probably counterproductive, even then.
[0] Note that the robot suggested to reduce calorie intake by 1,500->1,800 calories, and the recommended calorie intake is 2,000.
People losing weight are probably eating more than 2000 per day to begin with. But if you go from 2800 down to 1500 you’re already likely to exceed 3 lbs of weight loss per week that is recommended without doctor supervision. If you need to lose more than 150 lbs in a year because you’re well past morbid obesity then you need staff, not just a food plan.
Same advice as my trainer gives me.