Nutrition N Health Flashcards
Biologically complete / ideal protein
Contains all essential AA in adequate amounts to meet requirement.
Animal protein
Biologically incomplete protein
Protein lacking one or more essential AA required
Limiting AA
Essential AA lacking in given food item
Cereals deficient in lysine, threonine
Pulses deficient in methionine
Supplementary action of proteins
Combination of food items taken together to complement limiting AA
Wheat + pulses
Reference protein
Protein of high nutritive value usually with 16% nitrogen.
AA score
mg AA per g of test protein / of reference proteins *100
Protein digestibility corrected AA Score (PDCAAS)
Protein digestibility * AA score
Protein digestibility value
Protein % absorbed in blood stream
Net protein utilization (NPU)
Retained N2 / intake of N2 * 100
Consideres absorption and retention of nitrogen.
Egg is considered for reference with 100 NPU
1g of protein is equivalent to ___ of nitrogen
6.25g of nitrogen
Types of fibres
Soluble
Insoluble
Soluble fibres
Hydrophilic
Forms gel
Slows down digestion
Affect blood sugar level
Helps in insulin senstivity
Lowers LDL + cholesterol (absorption interefered)
Oats, apples, nuts, flax, berriers, cucumber, celery, carrots, lentils
Insoluble fibres / gut health fibre
Laxative effect
Bulk increasing
Speeds up food passing
Wheat, seeds, nuts, brown rice,brocolli, tomato,onion, cabbage
Fibre function
Constipation
Stomach and colon cancer
CVS diseases (cholesterol)
Reduce gallstone formation
Obesity
Diabetes (hyperglycemia)
Fibers in CVS diseases
Bind bile acids
Cholesterol and FA absorption slowed
Re absorption of bile acids slowed
Intestinal bac. Reduce soluble fibres to FA blocking
cholesterol synthesis.