What do you think about this mass gainer?

So I recently bought a vegan mass gainer, only because it looked really healthy when I read the ingredients. But when I got it, I looked at the back and it advises not to
take it under the age of 18, and I’m almost 17. It also had a text saying HARDCORE which felt like I was going to take steroids. I’m honestly not sure anymore if
this will be good for me if I implement it in my diet .

Anyways here stuff about the product:

Product name: USN whole food gainer

Ingredients: Oat Flour, Rice Protein, Rice Flour, Pea Protein, Flavouring, Sodium Chloride, Sweet Potato Starch, Potato Starch, Stabiliser, Non-nutritive
Sweetener Blend .

Protein per serving is 31g and carbs is 55g. It provides about 1800 kj per serving.

A little about me: 17, 180cm and 53kg, male. Been working out 4 times a week.

I’ve also heard that mass gainers could cause hair loss in some men and it makes me more scared to take this stuff. Tell me what you guys think. Anyone who knows a
lot about this stuff and has experience with it, please enlighten me, thanks!

What do you think about this mass gainer?