Sang Ye (Morus alba leaf)

Sang Ye (Morus alba leaf) contains 1-deoxynojirimycin and quercetin compounds that reduce respiratory inflammation and support liver detoxification. These bioactives work by inhibiting inflammatory cytokines and enhancing hepatic enzyme activity.

Origin & History

Sang Ye is derived from the leaves of the white mulberry tree, native to China. It is harvested and dried for medicinal use.

Historical & Cultural Context

Historically, Sang Ye has been used in Chinese herbal medicine for its cooling properties and to treat respiratory ailments.

Health Benefits

- Supports respiratory health by reducing inflammation in the airways, as shown in studies where it decreased symptoms by 30%. This helps ease breathing and improve overall lung function. - Enhances liver function by promoting detoxification processes, which aids in the breakdown of toxins and supports metabolic health. - Boosts immune system by increasing the production of white blood cells, which are crucial for fighting infections and maintaining overall health. - Lowers blood sugar levels by improving insulin sensitivity, potentially reducing the risk of type 2 diabetes. - Provides antioxidant protection by neutralizing free radicals, which helps prevent cellular damage and supports skin health. - Promotes cardiovascular health by reducing cholesterol levels, which can lower the risk of heart disease. - Aids in weight management by increasing metabolism and promoting fat oxidation, helping maintain a healthy weight.

How It Works

Sang Ye's primary bioactive 1-deoxynojirimycin inhibits α-glucosidase enzymes while quercetin and rutin suppress NF-κB inflammatory pathways. The compounds reduce pro-inflammatory cytokines IL-6 and TNF-α in respiratory tissues. Chlorogenic acid enhances Phase II liver detoxification enzymes including glutathione S-transferase.

Scientific Research

Studies on Sang Ye have shown its potential in reducing inflammation and oxidative stress. Some animal studies suggest benefits for respiratory health.

Clinical Summary

Limited human studies show Sang Ye extracts reduced respiratory inflammation symptoms by 30% in small trials of 60-80 participants. Animal studies demonstrate hepatoprotective effects with 200-400mg/kg doses improving liver enzyme markers. Most evidence comes from in vitro studies on isolated compounds rather than whole leaf preparations. Clinical data remains preliminary with larger randomized controlled trials needed.

Nutritional Profile

Sang Ye (Morus alba leaf) is rich in bioactive flavonoids including rutin (0.3–1.2% dry weight), quercetin (0.1–0.5%), and kaempferol glycosides, which exhibit strong antioxidant activity. It contains 1-deoxynojirimycin (DNJ) at approximately 0.1–0.2% dry weight, a potent alpha-glucosidase inhibitor relevant to blood sugar regulation; bioavailability of DNJ is relatively high due to its water-soluble nature. The leaf provides chlorogenic acid (0.5–2.0% dry weight) and caffeic acid derivatives contributing to anti-inflammatory and hepatoprotective effects. Polysaccharides constitute approximately 2–5% of dry weight, supporting immunomodulatory activity. Mineral content includes calcium (1,500–2,700 mg/100 g dry weight), potassium (1,200–2,000 mg/100 g), iron (8–15 mg/100 g), zinc (3–7 mg/100 g), and magnesium (300–500 mg/100 g). Vitamins present include beta-carotene (provitamin A, approximately 5–10 mg/100 g dry weight), vitamin C (15–30 mg/100 g fresh leaf, though reduced significantly upon drying and decoction), vitamin B1 (0.5–0.6 mg/100 g), and vitamin B2 (1.0–1.5 mg/100 g). Crude protein content ranges from 15–28% of dry weight, containing essential amino acids including leucine, lysine, and valine, though protein bioavailability is moderate due to plant cell wall matrix. Dietary fiber content is approximately 10–15% dry weight (largely insoluble cellulose and hemicellulose). Phytosterols, particularly beta-sitosterol (0.1–0.4% dry weight), are present and may contribute to cholesterol-modulating effects, though their oral bioavailability is limited (typically 5–10%). Gamma-aminobutyric acid (GABA) is present at approximately 0.02–0.2% dry weight, potentially supporting mild anxiolytic and hypotensive effects. Ursolic acid and oleanolic acid (triterpenoids, approximately 0.05–0.3% dry weight) contribute to anti-inflammatory and hepatoprotective properties. When prepared as a traditional decoction, water-soluble compounds (DNJ, flavonoid glycosides, chlorogenic acid, minerals, polysaccharides) are preferentially extracted, while lipophilic compounds (phytosterols, ursolic acid) have lower extraction efficiency.

Preparation & Dosage

Typical dosage ranges from 5 to 15 grams in decoction. Consult a healthcare provider before use.

Synergy & Pairings

Ju Hua, Lian Qiao, Jin Yin Hua

Safety & Interactions

Sang Ye is generally well-tolerated with mild gastrointestinal upset reported in some users. May interact with diabetes medications due to glucose-lowering effects of 1-deoxynojirimycin. Contraindicated during pregnancy and breastfeeding due to insufficient safety data. Can potentiate effects of blood pressure medications through ACE-inhibiting compounds.