All about fruitarianism with a long-term fruitarian, Lena

Autobiography

An account of fruitarian aspects of Lena's life in her own words.

  • Blog

    Personal blog of Fruitarian Lena - fruitarian life in text and photographs.

  • Vlog

    Lifestyle vlogs - videos and short films - by Lena, a vegan fruitarian European in California

  • Same Food Every Day

    For days I had the same: oranges, and then tomatoes with avocado, with occasional grapes or apples. It is around 6-8 pounds or ~ 3-4 kg (bulk), $5-7 a day, buying smartly in California.

    What are you guys having these days?

  • Tired and Happy - 20 Years Vegetarian

    On this gray Sunday, April 14 2013, I like to celebrate my 20-year strict high fruit vegetarianism. I switched some time in the beginning of March 1993 (do not remember the exact date, my notebooks were destroyed), but by now, on  it must be well over 20 years.

Socrates

Thou should eat to live, not live to eat. 

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.

Fruitarians.net Apple