What is Li Pi? Is it the same as pear flesh, snow pear or Chen Pi?
Li Pi (梨皮) is the fruit peel of Pyrus bretschneideri, P. pyrifolia or P. ussuriensis (white, sand or Ussurian pear). It is first recorded in the Diannan Bencao and compiled in Zhonghua Bencao. It is not a separate monograph in the current Chinese Pharmacopoeia; it is a folk and food-therapy item. Pear flesh is sweet, slightly sour and cool, stronger to clear the Lung, transform phlegm and generate fluid. Snow pear usually means the flesh of a milky cultivar, not the peel. Chen Pi is tangerine peel—acrid-bitter-warm, moving Qi and drying damp, a different drug. Write Li Pi or Sha Li Pi and peel an edible fresh pear; do not swap in waxed supermarket peel or aged tangerine peel.
What are the TCM properties and traditional uses of Li Pi?
According to Zhonghua Bencao, Li Pi is sweet, astringent and cool, enters the Lung, Heart, Kidney and Large Intestine channels, and acts to clear the Heart and moisten the Lung, downbear fire and generate fluid, and resolve sore toxin. It is used for summerheat vexing thirst, Lung-dryness cough, vomiting of blood, dysentery, scabies, and carbuncle on the back. Sweet-cool, moistening and slightly astringent—suited to summerheat damaging fluid and Lung dryness, not to Spleen-Stomach deficient cold or wind-cold phlegm-damp cough.
How do fresh and dried Li Pi differ? Is a special decoction needed?
Peel ripe fruit in the ninth to tenth month; use fresh or sun-dried. Fresh peel more clearly moistens dryness and generates fluid; dried peel stores more easily and is slightly gentler. Cut strips go in the pot or are boiled as a drink; first- or late-decoction is not needed. Commercial pears are often waxed and may hold pesticide—wash thoroughly or choose unwaxed edible fruit. External use is pounded juice on sores; keep it out of the mouth and eyes.
What is the usual dosage? Can it be boiled daily to relieve dryness?
The usual decoction is 9–15 g dried, or 30–60 g fresh. Summerheat damaging fluid and autumn-dryness dry cough may be a short boiled drink, not an unlimited four-season “pear-peel tea.” Spleen-deficient loose stool and cold epigastric pain grow more draining. Tannins are high; excess can bind the stool. People with diabetes who add rock sugar must count the sugar.
What are the contraindications? Can it be used in pregnancy?
Use caution in Spleen-Stomach deficient cold, cold-type cough with phlegm-damp, and loose stool. Cool, moistening and descending. Pregnancy is not a classical ban, but a weak middle and fetal cold should not live on large tea doses. Do not decoct waxed, moldy or untraceable peel. Stop if abdominal pain and diarrhea or thin clear phlegm appear.
Can Li Pi moisten the Lung, stop cough, generate fluid and promote urination?
It can help summerheat thirst and Lung-dryness dry cough, often with Fritillaria, rock sugar or pear flesh. Edema with poor digestion may join Acanthopanax, tangerine peel, mulberry root-bark and Poria peel, as in a Sichuan five-peel usage. Chronic dysentery may join pomegranate rind. It clears summerheat damaging fluid—not a specific for every cough, every edema or every dysentery. High fever with coughing of blood and acute enteritis need a physician.
Can Li Pi be drunk daily as a whitening, detox or cough tea?
Do not treat a fruit-peel food therapy as a cosmetic specific or a four-season cough tea. Lung-dryness fluid damage may be boiled for a short course; middle-cold loose stool only grows more injured. Waxed peel and pesticide residue are not “detox.” “Pear peel whitens” lacks a regulated basis. Clearing the Heart and moistening the Lung should use edible fresh peel, paired with flesh and Fritillaria after pattern differentiation.
How do you choose among Li Pi, pear flesh, Sang Bai Pi, Chen Pi and Mai Dong?
Pear peel is sweet-astringent-cool: clears the Heart, moistens the Lung, downbears fire and generates fluid with a slight bind. Pear flesh is sweet, slightly sour and cool: stronger to clear the Lung, transform phlegm and generate fluid, and is more often the food-therapy body. Mulberry root-bark is sweet-cold: drains the Lung, calms wheezing and promotes urine, leaning to excess-heat fullness. Tangerine peel is acrid-bitter-warm: moves Qi, fortifies the Spleen and dries damp—opposite in temperature. Ophiopogon is sweet, slightly bitter and slightly cold: dedicated to enriching Yin, moistening the Lung and boosting Stomach fluid. Summerheat thirst favors pear peel and flesh; phlegm-heat wheezing favors Sang Bai Pi; Qi-stagnation phlegm-damp favors Chen Pi. They may be paired; all are wrong as pure cool moistening when the cough is already deficient-cold.
Which herbs is Li Pi combined with? What are the representative uses?
Lung-dryness dry cough joins Fritillaria, rock sugar or pear flesh steamed together. Summerheat thirst may be a single-herb drink. Edema with poor digestion joins Acanthopanax, tangerine peel, mulberry root-bark and Poria peel in the Sichuan Zhong Yao Zhi five-peel usage. Chronic dysentery joins pomegranate rind. External pounded paste for carbuncle is from the Diannan Bencao. Write fresh or dried; do not confuse it with Chen Pi or Sang Bai Pi.
How do you choose and store Li Pi?
Choose peel from edible, unwaxed fruit without mold or a pesticide sting—pale yellow outside with fine specks, yellowish-white inside, a faint odor and a faintly sweet-sour taste. Black damp lots, thick wax film and untraceable peel are unused. Use fresh peel at once or keep it cold briefly; store dried peel dry and cool, protected from mold. Prepare it from an edible pear; do not replace it with supermarket waxed peel, ornamental pear or tangerine-peel crumbs.
