All about fruitarianism with a long-term fruitarian, Lena

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My watch with 33 rounds (25 yards x 66)

Swimming in UCSD pool, I started to count laps like in running, by rounds, to make it easier. So now, I touch the lap button on my watch on the start point only. I mostly swim a mile or so, in breaststroke, almost daily. Today I made 33 rounds (50 yards or 45.7 meters each, 25-yard laps x 66). It is 1650 yards, or ~ 0.94 miles, or ~1509 kilometers. 

My times stopped improving: the time for 1.5K on the watch is one of my best times - 41 minutes and 14 seconds, often I am 1-2 minutes slower.

Einstein:

Not everything that can be counted counts, and not everything that counts can be counted.

Protein Digestibility-Corrected Amino Acid Score

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:

  1. the validity of the preschool-age child amino acid requirement values (more than 4 times greater than the EAA requirement for an adult),
  2. the validity of correction for fecal instead of ileal digestibility,
  3. 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.

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