Randomly saw a post from others forum saying tat Whey+milk+banana = Mass gain / similar with mass gain supplement
is tat true?

I think the people here are a bit tired of these kind of questions.
for mass gain, your calorie intake should be more than the calories you burn off, it's as simple as that.

you know what mass gainer is?

a bunchload of calories, in powder form.

so yeah, true. no difference, other than the macro content

Better take egg+meat+protein daily .. better clean bulking