best way to loose fat is by following a nutritious balanced diet with all kinds of seasonal fruits and vegetables esp green veg.
with less fat -lean protein that helps take care of your deficiences like your concern of skin like soyabean will be appropriate.
plenty of fluid intake to flush toxins out.
you shouldnot loose weight fast otherwise it will come back soon.
slow and gradual fat loss withuot efffecting other organs is what you should aim at.
wish you good health.