Pear (Pyrus communis)

ByОлена Коновалова
PEAR
      The fruits of the pear (Pyrus communis) exhibit a relatively limited vitamin profile, but are characterized by a high concentration of specific mineral elements: boron (186.0% of the Daily Value [DV] per 100 g), lead (160.0%), cobalt (100.0%), and rubidium (44.0%). The mineral profile further includes substantial quantities of thallium (20.0%), silicon (17.0%), vanadium (12.5%), nickel (11.3%), copper (10.0%), and iron (9.7%).
     The pear is rich in total phytosterols (15.0% DV) and mono- and disaccharides (19.6%), within which glucose (27.6% DV per 100 g) and fructose (17.8% DV) serve as the predominant sugars. The nutritional matrix also includes dietary fiber (16.0%) and pectic substances (19.6%). The fruit contains minor quantities of starch (0.5 g per 100 g) and sucrose (0.78 g).
     The total purine base content per 100 g constitutes 5.0% of the daily allowance.
     The concentration of oxalic acid per 100 g is minimal (6.2 mg), representing 1.6% of the maximum tolerable daily intake (for further details, see Rhubarb).
     It should be noted that pear fruits exhibit a significant capacity for the bioaccumulation of toxic ultratrace elements, specifically: lead (160.0% DV per 100 g), thallium (20.0%), and strontium (8.6%).
Caloric content per 100 g: 58 kcal
Water per 100 g: 83.7 g
Ash per 100 g: 0.33 g
CHEMICAL COMPOSITION
 
Vitamins, macro- and microelements, nutrients per 100 g
VITAMINS
Name Content, mass fraction per 100 g of product % of daily norm
in numbers visually*
Vitamin B1 (thiamine) 0.01 mg 1% 0
Vitamin B2 (riboflavin) 0.03 mg 2% 5
Vitamin B5 (pantothenic acid) 0.05 mg 1% 0
Vitamin B6 (pyridoxine) 0.03 mg 2% 5
Vitamin B9 (folic acid) 7.0 µg 2% 5
Vitamin B12 (cyanocobalamin) 0.0 µg 0% 0
Vitamin C (ascorbic acid) 4.2 mg 5% 5
Vitamin E (alpha-tocopherol) 0.12 mg 1% 0
Beta-tocopherol 0.0 mg 0% 0
Gamma-tocopherol 0.03 mg 0.2% 0
Delta-tocopherol 0.0 mg 0% 0
Vitamin D (ergocalciferol) 0.0 µg 0% 0
Vitamin PP (nicotinic acid) 0.19 mg 1% 0
Vitamin K (phylloquinone) 4.5 µg 4% 5
Biotin 0.1 µg 0.2% 0
Beta-carotene 13.0 µg 0.4% 0
Alpha-carotene 0.0 µg 0% 0
Lutein + zeaxanthin 45.0 µg 0.8% 0
Beta-cryptoxanthin 2.0 µg 0.04%  0
Lycopene 0.0 µg 0% 0
Choline 5.1 mg 1% 0
Methylmethionine sulfonium (vitamin U) 0 mg 0%  0
Betaine trimethylglycine 0.2 mg 0.02% 0

* Full pitcher – 100% daily norm; empty – 0-1% daily norm.

MINERAL ELEMENTS

Macroelements

 

Name Content, mass fraction per 100 g of product % of daily norm
in numbers visually
Potassium 119.0-155.0 mg 5% 5
Calcium 9.0-19.0 mg 1.3% 0
Silicon 3.0-6.0  mg 17% 20
Magnesium 7.0-12.0 mg 2.3% 5
Sodium 1.0-14.0 mg 0.6% 0
Sulfur 6.0 mg 0.6% 0
Phosphorus 11.0-16.0 mg 1.6% 0
Chlorine 1.0 mg 0.04% 0

 

Microelements and ultratrace elements

 

Name Content, mass fraction per 100 g of product % of daily norm
in numbers visually
Aluminum 110.0 µg 0.3% 0
Boron 130.0 µg 186% 10090
Vanadium 5.0 µg 12.5% 10
Iron 0.17-2.3 mg 9.7% 10
Iodine 1.0 µg 0.7% 0
Cobalt 10.0 µg 100% 100
Lithium 3.0 µg 3.0% 5
Manganese 50.0-65.0 µg 3% 5
Copper 80.0-120.0 µg 10% 10
Molybdenum 5.0 µg 7.1% 10
Arsenic 0.1 µg 1% 0
Nickel 17.0 µg 11.3% 10
Tin 4.4 µg 0.2% 0
Rubidium 44.0 µg 44% 50
Lead 0.9-30.0 µg 160% 10060
Selenium 0.10-0.21 µg 0.2% 0
Strontium 69.0 µg 8.6% 10
Thallium 0.4 µg 20% 20
Fluorine 2.2-10.0 µg 0.2% 0
Chromium 1.8 µg 3.6% 5
Zinc 100.0-190.0 µg 1.2% 0

 

PROTEINS AND AMINO ACIDS

 

Name Content, mass fraction per 100 g of product % of daily norm
in numbers visually
Total protein content 0.38 g 1% 0
Content of essential amino acids 0.108 g 0.5% 0
Content of non-essential amino acids 0.183 g 0.3% 0

 

Essential Amino Acids

 

Name of the acid Content, g per 100 g of product % of daily norm
in numbers visually
Valine 0.016 g 0.6% 0
Histidine 0.007 g 0.3% 0
Isoleucine 0.013 g 0.7% 0
Leucine 0.021 g 0.5% 0
Lysine 0.021 g 0.5% 0
Methionine 0.003 g 0.2% 0
Threonine 0.011 g 0.5% 0
Tryptophan 0.003 g 0.3% 0
Phenylalanine 0.013 g 0.4% 0

 

Non-Essential Amino Acids

 

Name of the acid Content, g per 100 g of product % of daily norm
in numbers visually
Alanine 0.015 g 0.2% 0
Arginine 0.010 g 0.2% 0
Aspartic acid 0.060 g 0.5% 0
Glycine 0.013 g 0.4% 0
Glutamic acid 0.033 g 0.2% 0
Proline 0.029 g 0.6% 0
Serine 0.016 g 0.2% 0
Tyrosine 0.005 g 0.2% 0
Cystine 0.002 g 0.1% 0



FATS AND FATTY ACIDS

 

Name Content, mass fraction per 100 g of product % of daily norm
in numbers visually
Total fat content 0.12 g 0.1% 0
Content of unsaturated fatty acids 0.168 g 0.4% 0
Content of omega-3 unsaturated fatty acids 0.034 g 3.4% 5
Content of omega-6 unsaturated fatty acids 0.103 g 1.0% 0
Content of saturated fatty acids 0.052 g 0.2% 0

 

Unsaturated Fatty Acids

 

Name of the acid Content, g per 100 g of product
Palmitoleic C 16:1 (omega-7) 0.003 g
Oleic C 18:1 (omega-9) 0.027 g
Linoleic C 18:2 (omega-6) 0.103 g
Linolenic C 18:3 (omega-3) 0.034 g
Stearidonic C 18:4 (omega-3) 0.0 g
Gadoleic C 20:1 (omega-11) 0.0 g
Arachidonic C 20:4 (omega-6) 0.0 g
Eicosapentaenoic C 20:5 (omega-3) 0.0 g
Erucic C 22:1 (omega-9) 0.0 g
Clupanodonic C 22:5 (omega-3) 0.0 g
Docosahexaenoic C 22:6 (omega-3) 0.0 g
Nervonic C 24:1 (omega-9) 0.0 g

 

Saturated Fatty Acids

 

Name of the acid Content, g per 100 g of product
Lauric C 12:0 0.0 g
Myristic C 14:0 0.0 g
Palmitic C 16:0 0.042 g
Stearic C 18:0 0.010 g
Arachidic C 20:0 0.0 g
Behenic C 22:0 0.0 g
Lignoceric C 24:0 0.0 g

 

Sterols

 

Name Content, mass fraction per 100 g of product % of daily norm
in numbers visually
Total phytosterols 8.0 mg 15% 20
Campesterol No data
Beta-sitosterol No data
Stigmasterol No data
Cholesterol 0.0 mg 0% –

 

CARBOHYDRATES

 

Name Content per 100 g of product % of Daily Value (DV)
Numerical Visual
Total Carbohydrates 15.46 g 5% 5
Mono- and Disaccharides 9.8 g 19.6% 20
Glucose 2.76 g 27.6% 30
Fructose 6.23 g 17.8% 20
Galactose 0.0 g 0% 0
Sucrose 0.78 g – –
Lactose 0.01 g 0.0% 0
Starch 0.5 g –  –
Maltose 0.01 g – –
Dietary Fiber 3.1 g 16% 20
Pectin 0.98 g 19.6% 20
PURINE BASES
Name Content per 100 g of product % of Daily Value (DV)
Numerical Visual
Total Purines 6 mg 5% 5

Units of measurement:
Medium fruit: 135.0 g
Standard cup: 250.0 g
Faceted glass: 200.0 g
Teaspoon: 7.0 g
Tablespoon: 20.0 g

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