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
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% |
 |
| Calcium |
9.0-19.0 mg |
1.3% |
 |
| Silicon |
3.0-6.0 mg |
17% |
 |
| Magnesium |
7.0-12.0 mg |
2.3% |
|
| Sodium |
1.0-14.0 mg |
0.6% |
|
| Sulfur |
6.0 mg |
0.6% |
|
| Phosphorus |
11.0-16.0 mg |
1.6% |
|
| Chlorine |
1.0 mg |
0.04% |
|
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% |
|
| Boron |
130.0 µg |
186% |
  |
| Vanadium |
5.0 µg |
12.5% |
 |
| Iron |
0.17-2.3 mg |
9.7% |
|
| Iodine |
1.0 µg |
0.7% |
|
| Cobalt |
10.0 µg |
100% |
|
| Lithium |
3.0 µg |
3.0% |
|
| Manganese |
50.0-65.0 µg |
3% |
|
| Copper |
80.0-120.0 µg |
10% |
|
| Molybdenum |
5.0 µg |
7.1% |
|
| Arsenic |
0.1 µg |
1% |
|
| Nickel |
17.0 µg |
11.3% |
|
| Tin |
4.4 µg |
0.2% |
|
| Rubidium |
44.0 µg |
44% |
 |
| Lead |
0.9-30.0 µg |
160% |
 |
| Selenium |
0.10-0.21 µg |
0.2% |
|
| Strontium |
69.0 µg |
8.6% |
|
| Thallium |
0.4 µg |
20% |
|
| Fluorine |
2.2-10.0 µg |
0.2% |
|
| Chromium |
1.8 µg |
3.6% |
|
| Zinc |
100.0-190.0 µg |
1.2% |
|
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% |
|
| Content of essential amino acids |
0.108 g |
0.5% |
|
| Content of non-essential amino acids |
0.183 g |
0.3% |
|
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% |
|
| Histidine |
0.007 g |
0.3% |
|
| Isoleucine |
0.013 g |
0.7% |
|
| Leucine |
0.021 g |
0.5% |
|
| Lysine |
0.021 g |
0.5% |
|
| Methionine |
0.003 g |
0.2% |
|
| Threonine |
0.011 g |
0.5% |
|
| Tryptophan |
0.003 g |
0.3% |
|
| Phenylalanine |
0.013 g |
0.4% |
|
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% |
|
| Arginine |
0.010 g |
0.2% |
|
| Aspartic acid |
0.060 g |
0.5% |
|
| Glycine |
0.013 g |
0.4% |
|
| Glutamic acid |
0.033 g |
0.2% |
|
| Proline |
0.029 g |
0.6% |
|
| Serine |
0.016 g |
0.2% |
|
| Tyrosine |
0.005 g |
0.2% |
|
| Cystine |
0.002 g |
0.1% |
|
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% |
|
| Content of unsaturated fatty acids |
0.168 g |
0.4% |
|
| Content of omega-3 unsaturated fatty acids |
0.034 g |
3.4% |
|
| Content of omega-6 unsaturated fatty acids |
0.103 g |
1.0% |
|
| Content of saturated fatty acids |
0.052 g |
0.2% |
|
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% |
|
| 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% |
|
| Mono- and Disaccharides |
9.8 g |
19.6% |
|
| Glucose |
2.76 g |
27.6% |
 |
| Fructose |
6.23 g |
17.8% |
|
| Galactose |
0.0 g |
0% |
|
| Sucrose |
0.78 g |
– |
– |
| Lactose |
0.01 g |
0.0% |
|
| Starch |
0.5 g |
– |
– |
| Maltose |
0.01 g |
– |
– |
| Dietary Fiber |
3.1 g |
16% |
|
| Pectin |
0.98 g |
19.6% |
|
PURINE BASES
| Name |
Content per 100 g of product |
% of Daily Value (DV) |
| Numerical |
Visual |
| Total Purines |
6 mg |
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