For many, the lack of progress can be as simple as not eating enough calories. You may have a fast metabolism or be super active (work, sports, gym sessions) meaning you could be thousands of calories behind what you need to grow!
So, what can you do? Eating more is an option, but what if you’re already at your limit? This is what weight gainers are for: with a large amount of carbs and protein, weight gainers give you the calories you need, along with a LOT of the protein you need to build muscle
Simply mix with water, milk or whatever else you want to mix it with and enjoy!