The Herb Cabinet 本草

枸杞子 gǒu qǐ zǐ

Lycium barbarum · goji berry, wolfberry

Neutral Sweet LiverKidney

“The little red berries in every grandmother's soup pot. Gentle enough for the kitchen, respected enough for the pharmacy — food and medicine refusing to be separated.” — Lao Xinglin

What the tradition says

Gou qi zi is where the line between food and medicine happily dissolves. The tradition classes these sweet red berries as a yin and blood nourisher for the liver and kidney: for dizziness, weak knees and lower back, early graying, and above all for the eyes — blurry vision and declining sight are the classic callings^[1]. Because it is mild, neutral, and pleasant, it shows up as much in congee, soup, and tea as in prescriptions — the herb a grandmother doses by the handful, not the gram.

The plant is generous: the root bark (地骨皮, dì gǔ pí) is a separate, cooling medicine in its own right — one shrub, two drawers of the cabinet.

What the research says

Modern interest centers on the fruit's polysaccharides and its carotenoid zeaxanthin, which concentrates in the retina — a neat echo of the traditional eye indication, though clinical evidence in humans remains preliminary and mostly small-scale^[2]. Trials and reviews exist for immune measures, eye health, and metabolic markers; none yet amounts to proof for a specific condition^[2].

Where to be careful

• The one interaction worth memorizing: several case reports describe

elevated INR in people taking warfarin after goji tea or goji wine — if you are on anticoagulants, treat goji as a drug, not a snack^[2].

• Lycium may also affect how some drugs are metabolized (CYP-mediated), and

allergic reactions are reported in people with certain food allergies^[2].

• As ordinary food, for most people, it is about as benign as the

pharmacopoeia gets.

In the pharmacy

Dried berries of Lycium barbarum, from bright scarlet to brick red — Ningxia's crop is the famous one. Good berries are plump, sweet, and slightly chewy; they go into the pot with the rice, the tea, or straight into the mouth.

Reviewed 2026-08-25