Problem z wolowina w Polsce jest taki, ze praktycznie nie hoduje sie u nas ras miesnych, a to co mozna kupic w sklepach zazwyczaj pochodzi ze starych (zasuszonych) krow mlecznych albo buhajow w wieku poprodukcyjnym. Stad niska jakosc. Wolowina z ras miesnych nie staje sie twarda w wyniku obrobki cieplnej, ma krwistoczerwony kolor i smak, ktorego nie mozna porownac z niczym innym...
Co do tluszczu z wolowiny, raczej nie chodzi o to, ze nie jest metabolizowany (nie widze podstaw z zakresu biochemii/fizjologii trawienia wskazujacych na to, ze nie moglby byc metabolizowany), ale o to, ze podnosi znaczaco poziom frakcji LDL cholesterolu w osoczu krwi ludzi zdrowych (moge sie mylic- jesli ktos ma jakies informacje na ten temat, niech wklei).
Znalazlam taka referencje:
K O'Dea, K Traianedes, K Chisholm, H Leyden and AJ Sinclair;American Journal of Clinical Nutrition, Vol 52, 491-494; Cholesterol-lowering effect of a low-fat diet containing lean beef is reversed by the addition of beef fat:
The aim of this study was to differentiate between lean beef and beef fat as risk factors for elevated plasma cholesterol concentrations. Ten healthy weight-stable subjects (five men, five women) parti****ted. Energy intake was kept constant over the 5-wk study. Total cholesterol concentrations fell significantly within 1 wk of commencing the very- low fat (9%) energy from fat) lean-beef (500 g/d) diet (5.91 +/- 0.47 to 4.72 +/- 0.42 mmol/L, p less than 0.001) and rose as beef drippings were added in a stepwise manner in weeks 4 and 5 (5.45 +/- 0.56 mmol/L in week 5). The changes in total cholesterol concentrations were due almost entirely to changes in the concentration of low-density lipoprotein cholesterol levels. These results indicate that it is the beef fat, not lean beef itself, that is associated with elevations in cholesterol concentrations and that lean beef can be included in cholesterol-lowering diets provided it is free of all visible fat and the saturated fatty acid content of the diet is low.
Caly artykul tutaj:
http://www.ajcn.org/cgi/reprint/52/3/491
BTW- Mateo, SOG polecial, ale w innym dziale
Zmieniony przez - Martucca w dniu 2007-12-06 09:58:16