Healthy bodies come in a variety of shapes and sizes. If regulations were put in place requiring advertisers to use a variety of healthy realistic body types, predict how it would influence health behaviors of the general public.

If regulations were put in place requiring advertisers to use a variety of healthy realistic body types, they will have a better impact in people with low self-steem.

Explanation:

As it is said in the question, healthy bodies come in a variety of shapes and sizes. Advertisements, social media and many public figures only show the perfect kind of body which means super skinny girls with perfect faces and even sometimes white skin ones. This is not only false but also showing just a tiny part of the whole society. The "perfect type of body" actually should not exist as we consider it to be the unrealistc one, the thin one. A perfect body is a body which is healthy, and this does not mean it should be a BMI perfect.

There are current movements that promote "real bodies", those that have a a small belly (or not so small). Talking again about the question, If regulations were put in place requiring advertisers to use a variety of healthy realistic body types, it would boost the self steem of many women ans adolescents that don't feel comfortable with unrealistic  stereotypes. This also would help to reduce some eating disorders.

the psychologist would claim that the research results were significant.