Hermetica Superfood Encyclopedia
The Short Answer
Rehmannia glutinosa is a Traditional Chinese Medicine root containing catalpol and rehmannioside compounds that support kidney function and blood circulation. The herb's steamed form (Shu Di Huang) tonifies kidney yin energy and may enhance adrenal health through hypothalamic-pituitary-adrenal axis modulation.
CategoryRoot & Tuber
GroupTraditional Chinese Medicine
Evidence LevelModerate
Primary Keywordrehmannia glutinosa benefits
Synergy Pairings4
Rehmannia Glutinosa (Shu Di Huang) — botanical close-up
Health Benefits
Supports kidney and adrenal health by nourishing these organs and enhancing their function. This can improve stress response and energy levels. - Promotes blood circulation and may alleviate anemia by increasing red blood cell production. This enhances oxygen delivery throughout the body, boosting vitality. - Exhibits anti-inflammatory properties by inhibiting pro-inflammatory cytokines, which can reduce pain and swelling in chronic conditions. This supports joint health and mobility. - Enhances immune function by stimulating the production of white blood cells, improving the body's ability to fight infections. - Supports liver health by aiding in detoxification processes, which can improve metabolic health and reduce toxin buildup. - Improves bone health by providing essential minerals like calcium and phosphorus, crucial for maintaining bone density. - Supports hormonal balance by modulating endocrine function, which can improve reproductive health and alleviate symptoms of hormonal imbalances.
Origin & History
Natural habitat
Rehmannia Glutinosa, also known as Shu Di Huang, is a root native to China. It is traditionally steamed and dried to enhance its therapeutic properties, often used in herbal decoctions.
“Rehmannia has been a staple in Traditional Chinese Medicine for centuries, often used in formulations to nourish the blood and support kidney function.”Traditional Medicine
Scientific Research
Animal studies support rehmannia's anti-inflammatory and immune-boosting effects. Limited human trials suggest potential benefits in kidney health and anemia management.
Preparation & Dosage
Traditional preparation
Common dosage is 6-12 grams of rehmannia root in decoction form. Consult a healthcare provider before use.
Nutritional Profile
- Rich in iridoid glycosides and polysaccharides.
- Contains vitamins A and C.
- Provides essential minerals like calcium and magnesium.
How It Works
Mechanism of Action
Rehmannia glutinosa's primary bioactive compound catalpol activates the PI3K/Akt signaling pathway, promoting cellular survival and reducing oxidative stress in kidney tissues. The herb's rehmannioside compounds enhance erythropoiesis by stimulating EPO production, while iridoid glycosides modulate the HPA axis to support adrenal function. Additional compounds like acteoside provide nephroprotective effects through anti-inflammatory mechanisms.
Clinical Evidence
Limited human studies exist for rehmannia glutinosa as a standalone ingredient, with most research conducted in animal models or as part of Traditional Chinese Medicine formulas. Preclinical studies in rats demonstrate nephroprotective effects at doses of 200-400mg/kg, showing improved kidney function markers and reduced oxidative damage. One small human trial (n=60) of a rehmannia-containing formula showed modest improvements in chronic kidney disease markers over 12 weeks. The evidence base remains preliminary and requires larger, well-controlled human trials to establish clinical efficacy.
Safety & Interactions
Rehmannia glutinosa is generally well-tolerated but may cause digestive upset, diarrhea, or stomach discomfort in some individuals, particularly with the raw form. The herb may interact with diabetes medications by affecting blood sugar levels and should be used cautiously with anticoagulant drugs due to potential circulation effects. Pregnant and breastfeeding women should avoid rehmannia glutinosa due to insufficient safety data. Individuals with autoimmune conditions should consult healthcare providers before use as the herb may stimulate immune function.
Synergy Stack
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Also Known As
Rehmannia glutinosaChinese FoxgloveShu Di HuangPrepared RehmanniaSteamed Rehmannia RootDi HuangChinese RehmanniaGlutinous Rehmannia
Frequently Asked Questions
What is the difference between raw and prepared rehmannia glutinosa?
Raw rehmannia (Sheng Di Huang) has cooling properties and clears heat, while prepared rehmannia (Shu Di Huang) is steamed with wine and has warming properties that tonify kidney yin. The steaming process increases catalpol content and reduces digestive side effects.
How much rehmannia glutinosa should I take daily?
Traditional Chinese Medicine typically uses 9-15 grams of dried rehmannia root daily, often divided into 2-3 doses. Modern standardized extracts usually recommend 200-600mg daily, but optimal human dosing requires more clinical research to establish.
Can rehmannia glutinosa help with hair loss?
Traditional Chinese Medicine uses rehmannia for hair health based on the theory that kidney essence affects hair growth. However, no clinical studies have specifically tested rehmannia's effects on hair loss in humans.
Is rehmannia glutinosa safe for people with diabetes?
Rehmannia may affect blood sugar levels and could potentially interact with diabetes medications. People with diabetes should monitor blood glucose closely and consult their healthcare provider before using rehmannia supplements.
How long does it take for rehmannia glutinosa to show effects?
Traditional Chinese Medicine suggests rehmannia's tonic effects may take 4-8 weeks of consistent use to manifest. However, individual response varies and depends on the specific health condition being addressed and overall constitution.
Does rehmannia glutinosa interact with blood pressure or heart medications?
Rehmannia glutinosa may have mild blood pressure-lowering effects and can potentiate certain cardiovascular medications, so it should be used cautiously alongside antihypertensive drugs. Individuals taking heart medications, blood thinners, or blood pressure regulators should consult their healthcare provider before supplementing with rehmannia glutinosa. This is particularly important for those on prescription medications, as the herb's circulatory effects could amplify drug activity.
Is rehmannia glutinosa safe during pregnancy and breastfeeding?
Rehmannia glutinosa is traditionally considered warming to the spleen and may affect menstrual and reproductive function, making it potentially unsuitable during pregnancy without professional guidance. Most herbalists and practitioners recommend avoiding rehmannia glutinosa supplementation during pregnancy and breastfeeding due to insufficient safety data in these populations. Pregnant or nursing women should consult their healthcare provider before use.
What clinical evidence supports rehmannia glutinosa for kidney and adrenal support?
Traditional Chinese Medicine has used rehmannia glutinosa for over 2,000 years to tonify kidney yin and support adrenal resilience, with modern research showing it contains compounds that support normal cortisol patterns and stress response. Several peer-reviewed studies demonstrate rehmannia's ability to enhance antioxidant activity and reduce inflammation markers associated with adrenal fatigue, though large-scale clinical trials in Western populations remain limited. While the traditional evidence is substantial, more robust clinical research is needed to fully establish optimal dosing and efficacy in specific populations.
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