how can i gain weight quickly

[sigeonpex]

im like 49kg at 15 and 5% body fat and ive been struggling hard not being able to gain much weight. are there any supplements or ways to gain a lot of weight? no pinning pls

 

[frxfrxfrx]

im like 49kg at 15 and 5% body fat and ive been struggling hard not being able to gain much weight. are there any supplements or ways to gain a lot of weight? no pinning pls

how tall are you

 

[sigeonpex]

how tall are you

doesnbt matter, just know that im really underweight so how do i fix that