Chinese herbs

Rehmannia

Also called: shu di huang, di huang

A root used in many Chinese formulas.

Why people take it: Nourishment, blood sugar.
What the evidence says: Little evidence.
How it is usually taken: Usually in Chinese herbal formulas, 9 to 15 g of root a day.
Be careful: Loose stools.
Medicines it can interact with: May lower sugar with diabetes medicines.

Other chinese herbs

Dong quai Horny goat weed Schisandra Jujube Chrysanthemum tea Gynostemma Eucommia Polygonum multiflorum Pueraria Panax notoginseng American ginseng Ejiao Pearl powder Hawthorn berry (shanzha)Monk fruit

Common questions

What is Rehmannia?

A root used in many Chinese formulas.

Why do people take Rehmannia?

Nourishment, blood sugar.

Does Rehmannia work?

Little evidence.

How much Rehmannia do people take?

Usually in Chinese herbal formulas, 9 to 15 g of root a day.

Is Rehmannia safe?

Loose stools.

Does Rehmannia interact with medicines?

May lower sugar with diabetes medicines.

Sources and further reading

Last reviewed 31 October 2026. Written by Satya Babu.

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