It is based on your weight, or your calorie intake. There are a few ways of doing it which tells me that as long as you get about 20 - 30% of your calories from lean protein foods, you are probably getting enough. There are so many factors though, you should ask your doctor.
This article has more on protein..
How much protein do we need? - Nutrition - Canadian Living
Fiance and I bought a treadmill a few weeks ago, I actually find it easier to jog on than the ones at the gym for one huge reason - I get really anxious at the gym worrying about everyone else, so I can't jog properly and end up getting winded very fast - I worry about the person next to me if they are annoyed by my breathing, etc.. just stupid little things like that, that our minds make up when we're anxious which in turn make me even more anxious lol.. it's a vicious cycle.
Anyway, I started jogging at home and I can jog for twice as long during my intervals because I feel no anxiety with just my fiance here.
I'm proud of myself as it *feels* like a milestone lol.
My fiance and I have always enjoyed food, and weight creeps up on you when you are a foodie and aren't careful. We have always eaten healthier than most at home, with no prepacked foods etc. and I typically make a well balanced meal, which we also take for leftovers the next day. Anyway lol.
I lost about 15 lbs before Xmas and kept it off, and my plan is to go through weight loss about 10 - 15 lbs at a time, maintain, then try to lose more. If I lose more while I'm maintaining from exercise then so be it! I'm on my next kick now, so I'm taking it up a notch with the exercise and making the lifestyle changes to lose more. I'm 199 right now.. I want to be 150 - 140. Crossing below the 200 mark was great with the first 15 lbs.
My jeans fit again.. I have tons of clothes I want to wear again, and I WILL wear them !!!
Getting married next summer. I ordered my dress already, and I want to be able to alter it at least a handful of sizes by the time I'm at a healthier feel good weight.
Holy jeez I just spilled my life... lol.