Advice for hardgainers...???

I'm trying to gain a bit more m here...I'm 5'10" and fluctuate around 160-170lbs. my goal was always about 190-200lbs..i have tried every "miracle" product made by GNC, etc...all to no avail. B/c of some health issues, i can not have peanuts, peanut er, multivitamins and some other stuff too... Is there anyone out there who knows a better way to gain some good m? that is-withOUT a ton of supplements (illegal or legal). i refuse to go bankrupt on supplements that make me sick. Some more info on me-I have been routinely lifting for about 4-5 years, lowest weight being about 150 and highest about 185. I lift heavy about 4 times a week. I eat about 1500 cal/day and drink plenty of water. if anyone feels they have something to contribute (that i may not have heard a thousand times already) feel free to answer.. thanx in advance people.. and if anyone feels like talking at length about this, drop me a line/leave me an email address..