Herb Herbs that cool the Blood

Di Huang

Unprepared Rehmannia | 地黄

Rehmannia glutinosa

TCM Properties

Temperature

Cold

Taste

Sweet

Organ Affinity

Heart, Kidneys, Liver

Parts Used

Prepared dried root tuber

TCM Actions & Uses

Traditional Chinese Medicine properties and applications of Di Huang

Traditional Actions

Expels Heat by Cooling Blood.
Tonifies Yin by promoting Fluid production.
Soothes the Heart by calming Blazing Fire.
Cools and nourishes.

Key TCM Concepts

In Traditional Chinese Medicine (TCM), Di Huang belongs to the 'Herbs that cool the Blood' category. Herbs in this category are used to clear inflammatory and infectious conditions, referred to as 'Internal Heat' in TCM. This is why most of the herbs in this category will have both antibacterial and antiviral properties. In TCM one has too much 'Internal Heat' in their body as a result of a deficiency of 'Yin' (which is Cold in nature, see our explanation on Yin and Yang) or, more commonly, an Excess of Yang (Hot in nature). Herbs that cool the Blood treat the latter and as such tend to be Cold or Neutral in nature.

 

As suggested by its category Di Huang is Cold in nature. This means that Di Huang typically helps people who have too much 'Heat' in their body. Balance between Yin and Yang is a key health concept in TCM. Those who have too much Heat in their body are said to either have a Yang Excess (because Yang is Hot in nature) or a Yin deficiency (Yin is Cold in Nature). Depending on your condition Di Huang can help restore a harmonious balance between Yin and Yang.

 

Di Huang also tastes Sweet. The so-called 'Five Phases' theory in Chinese Medicine states that the taste of TCM ingredients is a key determinant of their action in the body. Sweet ingredients like Di Huang tends to slow down acute reactions and detoxify the body. They also have a tonic effect because they replenish Qi and Blood.

 

The tastes of ingredients in TCM also determine what Organs and Meridians they target. As such Di Huang is thought to target the Heart, the Kidney and the Liver. In addition to regulating Blood flow, in TCM the Heart is believed to be the store of the 'Mind' which basically refers to someone's vitality. The Kidneys do not only regulate the urinary system but also play a key role in the reproductive system and the growth and aging process of the body. The Liver is often referred as the body's "general" because it is in charge of regulating the movements of Qi and the Body Fluids. It also takes a leading role in balancing our emotions.

Common Applications

Palpitations Nosebleed Fever Insomnia Diabetes Dermatitis

Research Studies

Scientific research and clinical studies on Di Huang

Shufeng Liangxue Decoction (consisting of rehmannia root) is effective and safe in treating hormone dependence dermatitis.1

Ziyin Tongbi Decoction (consisting of rehmannia root) is effective and safe for the treatment of benign prostatic hyperplasia.2

Sources:

1. Bai YS, Zhou CY, Wang JQ. (2008). Clinical observation on auxiliary treatment of hormone dependence dermatitis by shufeng liangxue decoction. Zhongguo Zhong Xi Yi Jie He Za Zhi. , 28(12):1121-3.

2. Guo J1, Song CS, Han Q. (2008). Clinical observation on ziyin tongbi decoction in treating benign prostatic hyperplasia. Zhongguo Zhong Xi Yi Jie He Za Zhi. , 28(12):1082-5.

Preparation & Dosage

Traditional and modern methods for preparing Di Huang

Traditional Preparation

Remove impurities, wash, cut in thick slices and dry.

Recommended Dosage

Note: The following information is provided for educational purposes only and is not meant to replace professional medical advice.

9 - 30 grams

Safety & Contraindications

Important safety information and precautions for Di Huang

This information is for educational purposes only. Always consult with a qualified healthcare provider before using any herb or supplement.

Herb-Drug Interactions

Like many herbs, Di Huang may interact with certain medications. If you are taking any prescription medications, we recommend consulting with a healthcare provider knowledgeable in herb-drug interactions.

Related Educational Resources

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