Guest guest Posted June 3, 2000 Report Share Posted June 3, 2000 The amount of protein your body absorbs is directly related to how much protein your body needs. The more lean muscle mass you gain, the more protein your body needs to maintain it. Think about it. A 95 pound weakling does not need the same amount of protein that a 250 pound body builder needs. Makes sense. ~Laury P.S. I was a dietitian before my present profession. Quote Link to comment Share on other sites More sharing options...
Guest guest Posted July 7, 2009 Report Share Posted July 7, 2009 Hi, Is there a certain maximum amount of protein that the body can absorb during a meal? The reason I ask is that some of my patients are putting 40 grams of protein powder into water and drinking it to get more protein, and I just wanted to double check whether or not this would be beneficial towards meeting their protein requirements. Thanks, Myrowitz, MHS, RD, LDN Clinical Dietitian GBMC Comprehensive Obesity Management Program Quote Link to comment Share on other sites More sharing options...
Guest guest Posted July 8, 2009 Report Share Posted July 8, 2009 This is such a common question and I even wrote an article incorrectly citing that there was an upper limit of 30 grams per meal / setting. That was the only fact I hadn't check and I relied on the editing/fact checking of more seasoned dietitians than myself at that time.(I had just completed my bachelors in nutrition.) A dietitian who read my article then asked for the source and I realized I didn't have one and I went looking and looking to back up that claim I had repeated from a non-reputable source. Per conversations with a gastroenterologist and nephrologist, there is no maximum limit the body can absorb. If there were, we would see more cases of proteinemia from excessive protein consumption. But we don't see that. The body absorbs what it needs, deaminates what it doesn't, stores excess calories consumed, and excretes the rest as waste. When I asked if it was possible to consume such a large dose of protein as to cause a pH shift as some amino acids are acidic in nature he said hypthetically yes, but it would have to be such a large dose in a short period of time as to overwhelm the bodies buffering system and he doesn't know of such an incident ever having happened. I think the real concern with protein intake is: Is it meeting that person's protein needs based on their current situation? Is the protein intake in-line with overall calorie needed? Is the protein a high biological value / high PDCAA score source? Is the carbohydrates, B-vitamins, and fluid intake adequate to meet the needs to metabolize the protein being consumed? Protein intake has a positive and negative effect on calcium absorption/excretion. A study well publicized talks about strict vegetarian / vegans and an increased risk for osteoporosis from vegetable based protein sources. This population is already at a high risk for osteoporosis due to the surgery. Another study I used as part of my thesis reported the traditional .6 to .8 g pro/kg used to calculate protein needs had a high calcium loss in the urine than the group who whose protein needs were calculated at .9 to 1.0 g/kg. If you need the citations... let me know. I hope this helps Lora , MS, RD, LD Dietitian Full Circle Nutrition (940) 536-4433 www.fullcirclenutrition.com www.nutritionknowledgesurvey.com > > Hi, > > Is there a certain maximum amount of protein that the body can absorb during a meal? The reason I ask is that some of my patients are putting 40 grams of protein powder into water and drinking it to get more protein, and I just wanted to double check whether or not this would be beneficial towards meeting their protein requirements. > > Thanks, > > Myrowitz, MHS, RD, LDN > Clinical Dietitian > GBMC Comprehensive Obesity Management Program > Quote Link to comment Share on other sites More sharing options...
Guest guest Posted July 8, 2009 Report Share Posted July 8, 2009 There was a presentation at ADA Annual Meeting last fall from an Australian PhD and his dietitian, measuring muscle loss (sarcopenia) in hospitalized patients. They basically found that you lose muscle distressingly quickly from inactivity, but the take home message about the food was that 3 meals/day of 4 oz each had the maximum absorption. It didn't help to eat more at a sitting. Different patient population and no GI issues necessarily, but it does support the 30 gm limit. June Vista Health Re: protein absorption This is such a common question and I even wrote an article incorrectly citing that there was an upper limit of 30 grams per meal / setting. That was the only fact I hadn't check and I relied on the editing/fact checking of more seasoned dietitians than myself at that time.(I had just completed my bachelors in nutrition.) A dietitian who read my article then asked for the source and I realized I didn't have one and I went looking and looking to back up that claim I had repeated from a non-reputable source. Per conversations with a gastroenterologist and nephrologist, there is no maximum limit the body can absorb. If there were, we would see more cases of proteinemia from excessive protein consumption. But we don't see that. The body absorbs what it needs, deaminates what it doesn't, stores excess calories consumed, and excretes the rest as waste. When I asked if it was possible to consume such a large dose of protein as to cause a pH shift as some amino acids are acidic in nature he said hypthetically yes, but it would have to be such a large dose in a short period of time as to overwhelm the bodies buffering system and he doesn't know of such an incident ever having happened. I think the real concern with protein intake is: Is it meeting that person's protein needs based on their current situation? Is the protein intake in-line with overall calorie needed? Is the protein a high biological value / high PDCAA score source? Is the carbohydrates, B-vitamins, and fluid intake adequate to meet the needs to metabolize the protein being consumed? Protein intake has a positive and negative effect on calcium absorption/excretion. A study well publicized talks about strict vegetarian / vegans and an increased risk for osteoporosis from vegetable based protein sources. This population is already at a high risk for osteoporosis due to the surgery. Another study I used as part of my thesis reported the traditional .6 to .8 g pro/kg used to calculate protein needs had a high calcium loss in the urine than the group who whose protein needs were calculated at .9 to 1.0 g/kg. If you need the citations... let me know. I hope this helps Lora , MS, RD, LD Dietitian Full Circle Nutrition (940) 536-4433 www.fullcirclenutrition.com www.nutritionknowledgesurvey.com > > Hi, > > Is there a certain maximum amount of protein that the body can absorb during a meal? The reason I ask is that some of my patients are putting 40 grams of protein powder into water and drinking it to get more protein, and I just wanted to double check whether or not this would be beneficial towards meeting their protein requirements. > > Thanks, > > Myrowitz, MHS, RD, LDN > Clinical Dietitian > GBMC Comprehensive Obesity Management Program > Finding the best videos just got easier. Try the NEW Truveo.com. Quote Link to comment Share on other sites More sharing options...
Guest guest Posted July 9, 2009 Report Share Posted July 9, 2009 You can view the presentation and get the handouts from this talk here: http://www.eatright.org/cps/rde/xchg/ada/hs.xsl/7540_15808_ENU_HTML.htmKendra D. Blaschke, MS, RD, LDCitizens Medical CenterClinical Dietitian(361) 582-5623From: jgzaragoza@... <jgzaragoza@...>Subject: Re: Re: protein absorption Date: Thursday, July 9, 2009, 6:21 PM The researcher's name was Paddon-, dietitian Hewlings, also a PhD. The title of the talk was Aging Boomers: Is Muscle Loss the Silence Epidemic? [bariatricNutrition Dietitians] Re: protein absorption This is such a common question and I even wrote an article incorrectly citing that there was an upper limit of 30 grams per meal / setting. That was the only fact I hadn't check and I relied on the editing/fact checking of more seasoned dietitians than myself at that time.(I had just completed my bachelors in nutrition.) A dietitian who read my article then asked for the source and I realized I didn't have one and I went looking and looking to back up that claim I had repeated from a non-reputable source. Per conversations with a gastroenterologist and nephrologist, there is no maximum limit the body can absorb. If there were, we would see more cases of proteinemia from excessive protein consumption. But we don't see that. The body absorbs what it needs, deaminates what it doesn't, stores excess calories consumed, and excretes the rest as waste. When I asked if it was possible to consume such a large dose of protein as to cause a pH shift as some amino acids are acidic in nature he said hypthetically yes, but it would have to be such a large dose in a short period of time as to overwhelm the bodies buffering system and he doesn't know of such an incident ever having happened. I think the real concern with protein intake is: Is it meeting that person's protein needs based on their current situation? Is the protein intake in-line with overall calorie needed? Is the protein a high biological value / high PDCAA score source? Is the carbohydrates, B-vitamins, and fluid intake adequate to meet the needs to metabolize the protein being consumed? Protein intake has a positive and negative effect on calcium absorption/excretio n. A study well publicized talks about strict vegetarian / vegans and an increased risk for osteoporosis from vegetable based protein sources. This population is already at a high risk for osteoporosis due to the surgery. Another study I used as part of my thesis reported the traditional .6 to .8 g pro/kg used to calculate protein needs had a high calcium loss in the urine than the group who whose protein needs were calculated at .9 to 1.0 g/kg. If you need the citations... let me know. I hope this helps Lora , MS, RD, LD Dietitian Full Circle Nutrition (940) 536-4433 www.fullcirclenutri tion.com www.nutritionknowle dgesurvey. com > > Hi, > > Is there a certain maximum amount of protein that the body can absorb during a meal? The reason I ask is that some of my patients are putting 40 grams of protein powder into water and drinking it to get more protein, and I just wanted to double check whether or not this would be beneficial towards meeting their protein requirements. > > Thanks, > > Myrowitz, MHS, RD, LDN > Clinical Dietitian > GBMC Comprehensive Obesity Management Program > Finding the best videos just got easier. Try the NEW Truveo.com. Finding the best videos just got easier. Try the NEW Truveo.com. Quote Link to comment Share on other sites More sharing options...
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