Chinese Foxglove

Rehmannia Glutinosa

Use with CautionHormonal BalanceDetox & LiverImmune SupportPain & Inflammation

Medicinal Facts

Rehmannia glutinosa, known as Chinese Foxglove, is primarily recognized for its iridoid glycosides, such as catalpol and rehmannioside, which are pivotal in its medicinal applications. This herb sits at the intersection of Traditional Chinese Medicine (TCM), where it is a cornerstone for nourishing Yin and tonifying blood, and modern pharmacological research exploring its neuroprotective and anti-inflammatory effects. Its multifaceted role in both traditional practices and contemporary studies highlights its potential in addressing chronic conditions and metabolic disorders.

What it helps with

Neuroprotection & cognitive health

Catalpol, a major iridoid glycoside in Rehmannia, exhibits neuroprotective effects through the modulation of the PI3K/Akt signaling pathway, enhancing neuronal survival and reducing apoptosis. It also upregulates brain-derived neurotrophic factor (BDNF), supporting synaptic plasticity. Evidence from animal studies suggests potential benefits in neurodegenerative diseases such as Alzheimer's.

Inflammation & immune modulation

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About Chinese Foxglove

Rehmannia glutinosa, commonly known as Chinese Foxglove, is a perennial herb native to China, where it has been a staple in traditional Chinese medicine (TCM) for centuries. It is particularly valued for its roots, which are used in various forms to support kidney and adrenal health, regulate menstrual cycles, and boost overall vitality. The plant is often included in herbal formulations aimed at nourishing the blood and yin, addressing deficiencies that can lead to fatigue, dizziness, and paleness. The active compounds in Rehmannia glutinosa include iridoid glycosides, such as catalpol, which are believed to contribute to its anti-inflammatory and immune-modulating properties. Additionally, the herb contains polysaccharides that may enhance immune function and support liver health. In TCM, it is frequently used to treat conditions associated with yin deficiency, such as night sweats, tinnitus, and chronic fatigue. Modern research has begun to validate some of these traditional uses. Studies suggest that Rehmannia glutinosa may help modulate the immune system, protect the liver from damage, and reduce inflammation. Its potential to support adrenal function makes it a popular choice for those experiencing stress-related fatigue or burnout. However, due to its potent effects, it should be used under the guidance of a qualified healthcare practitioner, especially for individuals with pre-existing health conditions or those taking other medications.

Traditional Use

Rehmannia glutinosa has been used in traditional Chinese medicine for centuries, with its first documented use dating back to the Tang Dynasty (618-907 AD). It is a key ingredient in several classical herbal formulas, such as 'Sheng Di Huang,' which is used to nourish the yin and support the kidneys. The herb has also been recognized in other Asian cultures, including Japanese Kampo medicine, where it is valued for its restorative properties. Over time, its use has expanded to include modern herbal practices, where it is often recommended for adrenal support and overall vitality.

Preparations & Dosage

Preparations

Decoction: Combine 9-15 grams of dried Rehmannia root with 500 mL of water. Bring to a boil, then reduce heat and simmer for 30-45 minutes. Strain the liquid and drink warm. Can be consumed 1-2 times daily.
Tincture: Use a 1:5 ratio of dried root to alcohol. Macerate for 4-6 weeks in a dark place, shaking occasionally. Strain and store in a dark bottle. Take 2-4 mL up to three times daily.
Capsule: Use standardized Rehmannia root extract in capsule form. Take 500-1000 mg per dose, 1-3 times daily, with meals.

Interactions & Warnings

Rehmannia glutinosa may interact with medications that affect blood sugar levels, such as insulin or oral hypoglycemics, potentially enhancing their effects. It may also interact with antihypertensive drugs, necessitating careful monitoring of blood pressure. Additionally, due to its immune-modulating properties, it should be used cautiously in individuals with autoimmune conditions or those taking immunosuppressive medications.

Use with caution

Rehmannia glutinosa should be used with caution in individuals with digestive issues, as it may cause mild gastrointestinal discomfort. Pregnant and breastfeeding women should consult a healthcare provider before use. It may interact with medications affecting blood sugar and blood pressure.