I don't think you should be too low on your calories. I'm often high on my protein too. Interested to know what the negatives to too much protein as well.

I actually googled this question a few days ago and since then I've tried very hard to stay within my limits.

This is copied and pasted from an article that I'll post a link to at the end.

Eating a quantity of protein that is more than 30 per cent of your total daily caloric intake is no good, according to protein expert Gail Butterfield, PhD, RD, director of Nutrition Studies at the Palo Alto Veterans’ Administration Medical Center and nutrition lecturer at Stanford University. (medicinenet.com) Dr Butterfield explains Eating more protein and increasing total caloric intake while maintaining the same exercise level will build an equal amount of additional fat and muscle mass, according to a study published in 1992 in the Journal of the American Geriatrics Society.

One of the biggest problems with eating too much protein is that it can create kidney problems. Excessive intakes of protein causes a buildup of ketones which your kidneys then have to work hard to get rid of, often causing dehydration, in the least.

http://www.nutritionresearchcenter.org/healthnews/too-much-protein-is-no-good/

Everything I have read states that it is unhealthy for a woman to eat less than 1200 calories a day... so if you're over that you are ok... you don't want your body going into starvation mode.

I can speak from personal experience on the too much protein issue... I am currently having my kidneys tested due to protein in my urine at my last doctor's appointment for my bloodwork (I go every 3 months). I had started eating following a paleolithic diet back in October... it is a lot of lean protein and veggies, no grains, legumes, or dairy... we believe it was my over-eating of protein that may or may not be causing me a problem.... I just had to collect my urine (sorry if I'm grossing anyone out) for 24 hours so they can test it to see if I've caused any kidney damage or not... keep your fingers crossed for me!! (although my dr seemed pretty confident it was going to turn out to be nothing)

I would say on average of 70 - 90 g

I aim for 30% of my calories from protein, or 120-150 depending on the calories I'm eating that day. The MFP standards for protein are set really low. If you're lifting, like I am, your muscles need the extra protein to repair. My goal is 1g. for every pound of lean body mass. My understanding of "too much protein" is significantly more than that.