Det du sier der er veldig uinformert. Friske nyrer kan håndtere protein uansett mengde uten problemer.
Her er en god artikkel om nettopp dette:
http://www.iform.no/pub/art.php?id=952Proteinpulver er mat som kan gjøre hverdagen litt mindre stressende om du har dårlig tid til å lage mat. Proteinpulver er altså ingen bløff, men heller ikke noen "stor" hjelper.
Den ene studien involverer folk som inntar under 2g/kg protein, og det tilsvarer i overkant av 20% protein, som er øvre grense i helsedirektoratets anbefaling. Så det er ikke noe spesielt mye. Den andre studien involverer folk som inntok et ukjent kvantum med protein over en veldig kort tidsperiode. Det er derimot noe som heter protein-forgiftning, og det involverer både nyrene og leveren.
http://en.wikipedia.org/wiki/Inuit_diet"Because the climate of the Arctic is ill-suited for agriculture and lacks forageable plant matter for much of the year, the traditional Inuit diet is unusually low in carbohydrates and high in fat and animal protein. In the absence of carbohydrates, protein is broken down in the liver through gluconeogenesis and utilized as an energy source. Inuit studied in the 1970s were found to have abnormally large livers, presumably to assist in this process. Their urine volumes were also high, a result of the excess urea produced by gluconeogenesis.
Traditional Inuit diets derive, at most, 35-40% of their calories from protein, with 50-75% of calories preferably coming from fat. This high fat content provides valuable energy and prevents protein poisoning, which historically was sometimes a problem in late winter when game animals grew lean through winter starvation."
http://en.wikipedia.org/wiki/Rabbit_starvation"Rabbit starvation, also referred to as protein poisoning or mal de caribou, is a form of acute malnutrition caused by excess consumption of any lean meat (e.g., rabbit) coupled with a lack of other sources of nutrients usually in combination with other stressors, such as severe cold or dry environment. Symptoms include diarrhea, headache, fatigue, low blood pressure and heart rate, and a vague discomfort and hunger that can only be satisfied by consumption of fat or carbohydrates."
Rabbit starvation, eller protein-forgiftning er en aktuell problemstilling i forbindelse med ekstreme protein-dietter. Det finnes eksempler fra her på Treningsforum der folk spiser 50-90 % protein i forbindelse med en diett som pågår over lang tid, flere måneder.