All about fruitarianism with a long-term fruitarian, Lena

Estimated Average Requirement (EAR) and Recommended Dietary Allowance (RDA) for amino acids (protein) for healthy adults 19 y and older, mg/kg/day:

  • Estimated Average Requirement (EAR): average, estimated to meet the requirements of 50%.
  • Recommended Dietary Allowance (RDA): average, sufficient to meet the nutrient requirements of nearly all.
Amino Acids EAR RDA
phenylalanine + tyrosine 27 33
valine 19 24
threonine 16 20
tryptophan 4 5
methionine + cysteine 15 19
leucine 34 42
isoleucine 15 19
lysine 31 38
histidine 11 14

Franz Kafka

Now I can look at you in peace; I don't eat you any more.

Carotenoids

Carotenoids are a class of more than 750 pigments synthesized by plants, algae, and photosynthetic bacteria. These richly colored molecules are the sources of the yellow, orange, and red colors of many plants. Fruit and vegetables provide most of the 40 to 50 carotenoid phytonutrients found in the human diet.

The most common carotenoids in North American diets are α-carotene, β-carotene, β-cryptoxanthin, lutein, zeaxanthin, and lycopene. 

Provitamin A carotenoids - α-carotene, β-carotene, and β-cryptoxanthin - can be converted by the body to retinol (vitamin A), but not lutein, zeaxanthin, and lycopene. 

Dietary lutein and zeaxanthin help maintain optimal visual function - they absorb damaging blue light that enters the eye.

The results of observational studies suggest that diets high in carotenoid-rich fruit and vegetables are associated with reduced risks of cardiovascular disease and some cancers. But high-dose β-carotene supplements did not

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