What's the indication of protein overdose?

I have heard of people who have had kidney stones because of too much protein yes. If your only 112 lbs I dont see why you would need 150g's of protein. If your doing killer workouts everyday involving alot of lifting maybe I would consider it. I guess it all depends on what/how your body is handling it, your diet, and what your workouts are like as to where really your protein intake is. There are resources out there to tell you what percentage you should be shooting for and perhaps you should consult those. If you do however decide to keep your protein up in the 150's, you should be drinking alot of water too. Also, if your protein intake is high and your not putting in the workouts, Im to the understanding that a surplus of protein will turn to fat. I never have checked that out to be sure, so that may be something you'd want to research also. Im sure someone in MFP will know better than I. good luck

I take high proteins for a few reasons:

1. I lift 3 times a week
2. I love protein (who doesn't?). Steak tastes great.
3. If I eat rice/pasta/carbs during lunch, I get food coma. That's why I resort to veggies + meat
4. I love EGGGS, so I eat about 3 a day.

I drink quite a lot of water (3 liters a day?). In the past, a lot of water = clear urine. These days, I do not experience that. Hence I was thinking if somehow I'm overworking my kidney or if I overshoot on my protein intake.

I have heard rumors about how too high of a protein intake can affect your kidney adversely. Now, I do not completely buy into the whole argument but I am sure people can get overdose on protein (just as you can get overdose on anything else).

What then, is the sign of you eating too much protein? Breath smell? Urine color? Skin color? etc etc..
Is it a genuine concern (on the kidney or bones for example)? What are some sickness you can get from too much protein? kidney stones?

I just want to know a bit more about this issue because I've been engaging myself in a high protein diet (~150g for a 112lbs person) and I'm not sure how (un)healthy it is. Just want to get some feedback. Thanks!

Do regular high protein diets have potential health risks on kidney function in athletes?


Source


Department of Physiological Chemistry, Institute of Physical Education and Kinesiotherapy, Free University of Brussels, Belgium.


Abstract


Excess protein and amino acid intake have been recognized as hazardous potential implications for kidney function, leading to progressive impairment of this organ. It has been suggested in the literature, without clear evidence, that high protein intake by athletes has no harmful consequences on renal function. This study investigated body-builders (BB) and other well-trained athletes (OA) with high and medium protein intake, respectively, in order to shed light on this issue. The athletes underwent a 7-day nutrition record analysis as well as blood sample and urine collection to determine the potential renal consequences of a high protein intake. The data revealed that despite higher plasma concentration of uric acid and calcium, Group BB had renal clearances of creatinine, urea, and albumin that were within the normal range. The nitrogen balance for both groups became positive when daily protein intake exceeded 1.26 g.kg but there were no correlations between protein intake and creatinine clearance, albumin excretion rate, and calcium excretion rate. To conclude, it appears that protein intake under 2. 8 g.kgdoes not impair renal function in well-trained athletes as indicated by the measures of renal function used in this study


PMID: 10722779 [PubMed - indexed for MEDLINE]


Test subjects used up to 2.8g per kg of body weight. Some people then go on about osteoporesos caused by high protein and so on, again, shown not to be true -


They concluded that a protective effect of high-casein diet against CsA-induced proximal tubular damage was observed in Sprague–Dawley rats. Lacroix et al. studied the effects of a very-high-protein diet in rats over a period of 6 months. Forty eight Wistar rats received either a normal-protein diet (14% protein) or a very-high-protein diet (50% protein). No nephrocalcinosis, no area of collagenous sclerosis, and no hypercellularity were detectable. Also, endothelial and mesangial cells were normal and so were surrounding tubules.

Pons M, Plante I, LeBrun M et al. Protein-rich diet attenuates cyclosporin A-induced renal tubular damage in rats. J Renal Nutr 2003; 13: 84–92

Hey gang! I'm lookin for some info. I just started a high protein diet this week. I'm following the plan that's on men's health website. After logging my intake for the day my calorie intake was 2,024 calories. Broken down I had 51% from protein(259g), 34% from carbs and 15% from fat. I'm 5'9'' and weigh 193 pounds and I'm trying to lose my beer guy and put on muscle. I exercise 4 times a week plus work in construction so I move around all day at work. I have no clue if 50% of my calories coming from protein is good or bad for my situation. I felt fine all day, and not once got hungry or a craving. So, am I good? Or should I cut back a bit on the protein? Thanks a million for any feedback!