All about fruitarianism with a long-term fruitarian, Lena

phenylalanine

  • EAR and RDA for Amino Acids

    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
  • Amino Acid Requirements for Adults

    Estimates of Amino Acid Requirements for adultsmg / kg per day

    • Phenylalanine + tyrosine: 14
    • Leucine: 14
    • Methionine + cystine13
    • Histidine: 8–12
    • Lysine: 12
    • Isoleucine: 10
    • Valine: 10
    • Threonine: 7
    • Tryptophan: 3.5

  • Phenylalanine Food Sources

    Fruitarian foods high in amino acid phenylalanine, per 100 g (~1/5 lb): 

    • Spirulina, dried - 2777 mg 
    • Soybeans - 2122 mg 
    • Pumpkin or squash seeds - 1642 mg 
    • Peanuts - 1427 mg 
    • Kidney beans - 1370 mg 
    • Lentils, sprouted - 442 mg 
    • Avocados - 260 mg
    • Raisins - 140 mg 
    • Grapefruit - 53mg 
  • Phenylalanine

    Phenylalanine is an essential amino acid.

    Provided by diet, phenylalanine can be converted into another amino acid, tyrosine, in the body. Tyrosine is used to synthesize two key neurotransmitters that promote alertness: dopamine and norepinephrine. 

    It has 3 forms:

    • D-phenylalanine;
    • L-phenylalanine - most common, the form in which phenylalanine is incorporated into the body’s proteins;
    • DL-phenylalanine.

  • All Essential Amino Acids

    An essential amino acid, or indispensable amino acid, is an amino acid that cannot be synthesized by the organism, and must be supplied in diet. 

    The 9 amino acids humans cannot synthesize (F V T W M L I K H):

    • phenylalanine
    • valine
    • threonine
    • tryptophan
    • methionine
    • leucine
    • isoleucine
    • lysine
    • histidine

    Animal and plant proteins are made up of about 20 common amino acids.

    Synthesis of 6 other amino acids - conditionally essential - can be limited under special conditions (R C G Q P Y)arginine, cysteine, glycine, glutamine, proline, and tyrosine.

    Dispensable amino acids can be synthesized in the human body, 5 (A D N E S): alanine, aspartic acid, asparagine, glutamic acid and serine .

Gottfried Wilhelm Leibniz

We live in the best of all possible worlds.

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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