All about fruitarianism with a long-term fruitarian, Lena

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  • Vitamin C

    Vitamin C, or L-ascorbic acid, or ascorbate, is an essential nutrient for humans, a water-soluble vitamin. Humans, unlike most animals, are unable to synthesize vitamin C, so it is an essential dietary component. 

    • Vitamin C is required for the biosynthesis of collagen (an essential component of connective tissue), L-carnitine, and certain neurotransmitters, it is also involved in protein metabolism.
    • Vitamin C is also an important physiological antioxidant and has been shown to regenerate other antioxidants within the body, including alpha-tocopherol (vitamin E). Vitamin C regenerates vitamin E by reducing vitamin E radicals formed when vitamin E scavenges the oxygen radicals. 
    • Vitamin C plays an important role in immune function and improves the absorption of nonheme iron, the form of iron present in plant-based foods.

    Approximately 70%–90% of vitamin C is absorbed at moderate intakes of 30–180 mg a day. At doses above 1 g a day, absorption falls to less than 50% and absorbed, unmetabolized ascorbic acid is excreted in the urine. 

    Insufficient vitamin C intake causes scurvy, which is characterized by fatigue or lassitude, connective tissue weakness, and capillary fragility.

    Cells accumulate vitamin C. The total body content of vitamin C ranges from 300 mg (at near scurvy) to about 2 g.

    • High levels of vitamin C are maintained in cells and tissues, and are highest in leukocytes (white blood cells), eyes, adrenal glands, pituitary gland, and brain.
    • Relatively low levels of vitamin C are found in extracellular fluids, such as plasma, red blood cells, and saliva.
  • All Known Essential Vitamins

    Vitamins are a group of substances that are needed for normal cell function, growth, and development. There are 13 essential vitamins:

    • Vitamin A (retinol, retinal, 4 carotenoids)
    • Vitamin C (ascorbic acid)
    • Vitamin D (D3 - Cholecalciferol, D2 - Ergocalciferol)
    • Vitamin E (tocopherols, tocotrienols)
    • Vitamin K (phylloquinone, menaquinones)
    • Vitamin B1 (thiamine)
    • Vitamin B2 (riboflavin)
    • Vitamin B3 (niacin)
    • Vitamin B5 (pantothenic acid)
    • Vitamin B6 (pyridoxine, pyridoxal, pyridoxamine)
    • Vitamin B7 (biotin)
    • Vitamin B9 (folic acid)
    • Vitamin B12 (cyanocobalamin)

    Fat-soluble vitamins are stored in the body's fatty tissue: vitamins A, D, E, K

    Water-soluble vitamins - the body must use almost all water-soluble vitamins right away - vitamins B1, B2, B3, B5, B6, B7, B9 and C.
    Vitamin B12 is the only water-soluble vitamin that can be stored in the liver for many years.

Einstein:

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

Choline Recommended Intake from Seeds and Fruits

Choline is an essential vitamin-like (vitamin B4) nutrient, synthesized in human body, but not sufficiently.

The recommended adequate intake (AI) of choline is set at 425 milligrams (mg)/day for women and 550 mg/day for men.

Choline deficiency causes muscle damage and abnormal deposition of fat in the liver, which results in a condition called nonalcoholic fatty liver disease. Genetic predispositions and gender can influence individual variation in choline requirements.

Example Plant Fruitarian Sources of Choline

Seeds (including legumes and nuts), high in choline, milligrams per 100 g portion: 

  • Soybeans - 124 mg 
  • Lima beans - 97 mg 
  • Lentils - 96 mg
  • Peas (mature) - 96 mg
  • Flaxseeds - 79 mg 
  • Pistachio nuts - 71 mg 
  • Quinoa - 70 mg 
  • Pumpkin and squash seed kernels (pepitas) -  63 mg 
  • Cashew nuts - 61 mg 
  • Pine nuts - 56 mg 
  • Sunflower seed kernels - 55 mg 
  • Buckwheat - 54 mg 
  • Almonds - 52 mg 

Fruits, high in choline, milligrams per 100 g portion: 

  • Tomatoes, sun-dried - 105 mg 
  • Apples - 18 mg 
  • Figs - 16 mg 
  • Avocados - 14 mg 

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