Pich, ne se shashkai, vse pone vitaminkite ot jyltyka sa se usvoili.
Beltyka na iaiceto ima okolo 5% usvoiaemost ako se gotvi pod 4-5 i nad 15 minuti. Inache e v diapazona 90-99%. Znam go ot moi priateli lekari, na koito imam doverie (ot tezi, koito mi iziajdat jyltycite kato mi doidat na gosti i ne mrynkat che ot mazninite shte me hvane bog znae kakva bolest, syvsem adekvatni hora sa) Stava vypros za NPU predpolagam, no v bylgarskite uchebnici ne se izpolzva nito edno sykrashtenie, a usvoiaemost moje da e vsichko. Az si gi gotvia, da mi e mirna glavata. Ne zabraviai i da gi izmivash dobre che salmonelkata jivee po cherupkite ( 1 na 30000 iaica e zarazeno, predstavi si.....:P)

A eto i niakolko nachina i termina za izmervane na KPD-to na beltychinite:


PER (Protein Efficiency Ratio):
An outdated method of evaluating protein quality based on the rate of growth of young rats using various protein combinations. A PER above 2.5 was considered excellent based on Egg and casein ( milk protein) with a PER of 3.0. This method gave too much weight to the importance of the essential amino acid Methionine which is more important to developing hair on the rat than it is to human nutrition.

NPU (Net Protein Utilization)
Another outdated or seldom used measure to reflect the value of protein foods. It is basically the amount of protein that a given food makes available to your body based on digestibility and the amino acid composition. A value of 100 indicates that every of protein eaten would be used to produce lean tissue. The highest NPU is egg protein with a score of 94.

BV (Biological Value)
Also outdated but it is a system which evaluates protein based on the amount of nitrogen retained by the body after absorption of a protein food. Again the egg is the standard and the highest value possible is 100 even though some companies try to tell you different about their products.

PDCAAS (Protein Digestibility Corrected Amino Acid Score)
A mouthful but currently the protein quality system considered to be most reliable. The highest score is 1.0 and this is given to any protein source considered complete for use by the human body. Soy protein isolates, egg white, whey protein isolates and casein proteins supplements all scored 1.0 on this test. Beef scored 0.92 and beans were at 0.68.

some things never change, and some do