While everyone’s dietary needs are different, to be clear: 900 calories a day can be dangerous and lead to malnutrition over time (most people have a resting metabolic rate of at least 1,000 calories). What’s more, promotion of restrictive eating can send an incredibly negative message and end up justifying disordered eating.
The National Eating Disorders Association helpline is 1-800-931-2237; for 24/7 crisis support, text “NEDA” to 741741.
Source: https://www.buzzfeed.com/natashajokic1/heidi-klum-diet-criticism