Evidence supporting the use of: Green tea
For the health condition: Dementia

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Synopsis

Source of validity: Scientific
Rating (out of 5): 2

Green tea (Camellia sinensis) has been investigated for its potential neuroprotective effects, including its relevance to dementia and cognitive decline. The primary bioactive compounds in green tea are catechins, especially epigallocatechin gallate (EGCG), which exhibit antioxidant and anti-inflammatory properties. Laboratory and animal studies have shown that EGCG can inhibit amyloid-beta aggregation, reduce oxidative stress, and modulate pathways involved in neuronal survival—mechanisms implicated in the pathology of Alzheimer’s disease and other dementias.

Small-scale human studies and epidemiological research suggest an association between habitual green tea consumption and a lower risk of cognitive impairment or dementia. For example, a longitudinal study in Japan found that individuals who drank more green tea had a reduced risk of developing cognitive decline. However, these studies are often observational and cannot establish causality. Randomized controlled trials in humans are limited and have produced mixed results, with some showing modest cognitive benefits while others found no significant effect.

Overall, while laboratory research and preliminary human data indicate potential cognitive benefits, the clinical evidence supporting green tea as a treatment or preventive measure for dementia is currently limited and not definitive. Further large-scale, well-designed clinical trials are needed to confirm efficacy. Thus, the evidence rating is 2: promising in theory and preclinical studies, but lacking robust clinical validation for dementia treatment or prevention.

More about green tea
More about Dementia

Other health conditions supported by green tea

Acne
Addictions (coffee, caffeine)
Age Spots
Aging (prevention)
Allergies (food)
Allergies (respiratory)
Alzheimer's Disease
Antibiotics (alternatives to)
Anxiety
Anxiety Disorders
Appetite (excessive)
Arteriosclerosis
Arthritis
Asthma
Athletic and Exercise Aids
Autoimmune Disorders
Belching
Benign Prostate Hyperplasia
Bites and Stings
Bleeding (internal)
Blood in Urine
Bloodshot Eyes
Breast Lumps
Cancer (natural therapy for)
Cancer (prevention)
Cardiovascular Disease
Cartilage Damage
Cellulite
Cervical Dysplasia
Chemotherapy (reducing side effects)
Chicken Pox
Cholesterol (high)
Cholesterol (low)
Chronic Obstructive Pulmonary Disorder
Circulation (poor)
Circulation (to the brain)
Cirrhosis of the Liver
Colds (antiviral)
Colds (decongestant)
Colds (general)
Colds (prevention)
Colds (with fever)
Colic (children)
Colitis
Colon (atonic)
Colon (spastic)
Concentration (poor)
Congestion
Congestion (bronchial)
Congestion (lungs)
Congestion (lymphatic)
Congestion (sinus)
Conjunctivitis
Constipation (adults)
Contagious Diseases
Convalescence
Cough (damp)
Cough (dry)
Cough (general)
Cough (spastic)
Cramps (menstrual)
Crohn's Disease
Cuts
Cystic Breast Disease
Cystic Fibrosis
Cytomealovirus
Dandruff
Debility
Dementia
Denture Sores
Depression
Dermatitis
Diabetes
Diabetic Retinopathy
Diarrhea
Digestion (poor)
Down Syndrome
Endometriosis
Epstein Barr Virus
Eye Infections
Eye Problems
Eyes (red or itching)
Fibroids (uterine)
Free Radical Damage
Fungal Infections
Glaucoma
Hemochromatosis
Irritable Bowel Syndrome
Parkinson's Disease
Perspiration (excessive)
PMS (general)
Polyps
Rosacea
Skin (oily)
Abdominal Pain
Abscesses
Body Odor
Cancer Treatment (reducing side effects)
Fatigue
Gastritis
Gingivitis
Hair (loss or thinning)
Headache (general)
Hypertension
Inflammation
Influenza
Liver Detoxification
Memory and Brain Function
Oral Surgery
Psoriasis
Stress
Triglycerides (high)
Ulcers
Urinary Tract Infections
Wrinkles