To live longer, eat 7+ pieces of fresh fruits or vegetables a day, but not canned or frozen.
People who ate at least 7 portions of fruit and vegetables each day were 42% less likely to die from any cause.
It was shown in a recent European study that followed more than 65 thousands participants over 12 years. People with the highest intakes were also 25% less likely to die from cancer and 31% less likely to die from heart disease. Analyzing studies like this, we need to remember that term “vegetables” usually include non-sweet fruits in botanical sense, like tomatoes, bell peppers, cucumbers, eggplants, squashes, and many others. See Vegetables, Fruits.
But canned and frozen fruit increased the risk of dying by 17%, and fruit juice was found to have no significant benefit.
The lead author of this study, Dr. Oyinlola Oyebode of department of epidemiology and public health in UCL, said:
“The clear message here is that the more fruit and vegetables you eat, the less likely you are to die at any age. My advice would be however much you are eating now, eat more.”
The protein digestibility-corrected amino acid score (PDCAAS) has been adopted by FAO/WHO as the preferred method for the measurement of the protein value in human nutrition.
PDCAAS = Amino Acid Score x Digestibility
The method is based on comparison of the concentration of the first limiting essential amino acid in the test protein with the concentration of that amino acid in a reference (scoring) pattern. This scoring pattern is derived from the essential amino acid requirements of the preschool-age child.
Although the principle of the PDCAAS method has been widely accepted, critical questions have been raised in the scientific community:
- the validity of the preschool-age child amino acid requirement values (more than 4 times greater than the EAA requirement for an adult),
- the validity of correction for fecal instead of ileal digestibility,
- the truncation of PDCAAS values to 100%.
The reference scoring pattern was based on studies performed more than 25 years ago on a limited number of 2-year-old children recovering from malnutrition.
According to the current official recommendations, a 2-year old child needs ~ 3x higher essential-to-non-essential amino acid ratio, and needs essential amino acids in different proportions than adult. Methionine/cysteine is the limiting essential amino acids for adults, and for children it is lysine or tryptophan.
The use of fecal digestibility overestimates the nutritional value of a protein because amino acid nitrogen entering the colon is lost for protein synthesis in the body and is, at least in part, excreted in urine as ammonia.