[Grammar] what does ' less established' mean?

[fabi1226]

Almost all of the studies that Rizzoli highlights in his review (2) involve children and adolescents, as the evidence for the influence of dairy foods on reducing (or preventing) fracture in adults is less established than that for increasing bone mass.

i don't get this sentence. does it mean that eaiting dairy food in adolescents influence increasing bone mass more than reducing fracture?

could someone simplify this sentence please? i don't get 'less established"...ㅜㅜ

 

[Matthew Wai]

http://www.oxforddictionaries.com/definition/english/established It may be helpful to you.

Not a teacher.

 

[emsr2d2]

Almost all of the studies that Rizzoli highlights in his review (2) involve children and adolescents, as the evidence for the influence of dairy foods on reducing (or preventing) fracture in adults is less established than that for increasing bone mass.

I don't get this sentence. Does it mean that [strike]eaiting[/strike] eating dairy food in adolescents influences increasing bone mass more than reducing fracture?

Could someone simplify this sentence please? I don't get 'less established. [...ㅜㅜ] None of these symbols is required.

Please see my amendments above. Remember to capitalise the first letter of a new sentence at all times.

Does it help to realise that "less established" refers to "the evidence"?