Bethany T, UK
"I gotta' hand it to the man - he knows his stuff! Jack always backs up his suggestions with verified science. This not only helps me...
Bethany T, UK
Millie C, UK
Christina T, UK
Elliot P, UK
Gemma M, USA
Sophie F, UK
Dr Lewis I, UK
Hannah E, AUS
Leah B, USA
Bethany I, USA
Luke M, UK
Anne B, UK
Angela D, USA