Du Zhong

the leaves are the strongest part of the plant compared to the cortex, flower, and fruit.

The leaves have been reported to enhance bone strength and body muscles.

reported to exhibit protective effects on kidneys as observed by malonaldehyde and glutathione levels (increasing glutathione levels) after renal perfusions.

can help lower high blood pressure (hypertension).

has antiviral and antibacterial effects.

no drug interactions and no side effects of taking too much.

has been used in traditional Chinese medicine for several thousand years.

has several pharmacological properties such as antioxidant, anti-inflammatory, antiallergic, antimicrobial, anticancer, antiaging, cardioprotective, and neuroprotective properties.

tldr https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4793136/

It lowers malondialdehyde (MDA) levels, a marker of oxidative damage, protecting tissues like the brain and liver.
Eucommia ulmoides leaf and bark extracts increase the activities of key antioxidant enzymes, including glutathione peroxidase (GSH-Px), superoxide dismutase (SOD), and catalase (CAT).
It is used as a natural health booster in poultry feed (improving immunity) and shows potential for medicinal use in improving antioxidant capacity.
USDA Zones 4-7