Im new here and I am looking to put on muscle, i weigh 145lbs and Im 5'10''

[Seattle Junk]

You are an ectomorph, you have a fast metabolism of course. You do need to eat a lot of calories and protein. You pretty much need to eat everything in site and a lot of it. But you need to stick to a solid base diet of quality protein and carbs and you need to eat until you almost feel sick. I know that is hard but you need to be eating way over your maintainence calories to put on muscle. I would like to see you eat this way for at least 3 months while hitting the gym hard. Do you need a trainer? Once you do that you should gain 10-20lbs no problem, if not then we can talk about AAS, GH, etc. Food is the most anabolic substance you can put in your body. Once you put on a good base naturally then AAS is going to be way more effective. This is good advice that everybody is giving you here and it is correct.

[killagorilla187]

Your main problem is eating enough calories, you should really try to gain some mass naturally.

If you ate right, you could naturally get to 170+lbs in a decent amount of time. Every day you have to eat alot, you can not forget about eating or miss a meal. Your body will just eat up everything, you have to create a surplus, even if full eat more!