Ash Tree: Benefits, Dosage, Contraindications
Other name(s)
European Ash
Scientific name(s)
Fraxinus excelsior
Family or group:
Plants
Active ingredients:
Tannins
Coumarins
Flavonoids
Mucilages
Excelsioside
Indications
Rating methodology
EFSA approval.
Gout ✪✪✪✪✪
In gemmotherapy, the buds are used to increase urine quantity (usage confirmed by the EMA) and lower uric acid levels responsible for gout.
Posologie
Oral route: buds
40 - 100 drops
gemmotherapy
Synergies
Joint pain, Tendonitis ✪✪✪✪✪
The EMA indicates that ash (leaf) is used to relieve minor joint pain.
Posologie
Oral route: leaf, buds
10 - 30 g
gemmotherapy, aqueous decoction
Rheumatism ✪✪✪✪✪
Various in vitro and especially in vivo studies have proven its anti-inflammatory and antirheumatic properties, often comparable to non-steroidal anti-inflammatory drugs, but with little or no side effects. In gemmotherapy, buds are recommended for rheumatism, particularly osteoarthritis, polyarthritis, and gouty rheumatism.
Posologie
Oral route: buds, leaf
10 - 30 g
gemmotherapy
Urinary disorders ✪✪✪✪✪
The EMA recommends ash leaves as a traditional herbal medicine used to increase urine quantity and as an adjuvant in minor urinary complaints.
Posologie
Oral route: leaf, buds
10 - 30 g
gemmotherapy, aqueous decoction
Properties
Diuretic
Aqueous extract of ash significantly increased urine production in normotensive and hypertensive rats according to a study. It caused a significant increase in urinary excretion of sodium, potassium, and chlorides, which is an indicator of diuretic effect. In normotensive rats, ash extract increased glomerular filtration rate, an important indicator of kidney function, measuring filtered blood quantity. These results suggest that ash extract may be effective in promoting urinary excretion and improving renal function, thus having potential for the treatment of conditions requiring increased diuresis.
Usages associés
Analgesic
The analgesic properties of ash have been demonstrated with combined products containing ash bark, Populus tremula (aspen) bark/leaf, and Solidaginis herba (goldenrod) in clinical studies on rheumatoid arthritis and osteoarthritis. The effectiveness of the combined product would be similar to that of non-steroidal anti-inflammatory drugs (NSAIDs), with half as many undesirable effects.
Usages associés
Anti-inflammatory
Extracts from various Fraxinus species have reduced the production of inflammatory mediators and leukocyte influx. Ash leaf extracts decrease the release of pro-inflammatory cytokines like TNF-b1 and IL-6. This reduces inflammation and associated tissue damage. Ash extracts also increase the expression of the receptor for IL-10, an anti-inflammatory cytokine, helping to regulate and control the immune response. Specific compounds from ash, such as oleuropein, ligstroside, verbascoside, and rutoside, have been identified as contributors to these anti-inflammatory effects.
Usages associés
Safety dosage
Adult from 18 years: 10 g - 30 g
Tea: 10 to 30 g of pulverized plant material in 1000 ml boiling water as infusion, divided into 2 or 3 individual doses. In gemmotherapy: 40 to 100 drops per day of 1D glycerinated macerate.
Precautions
Child up to 18 years: avoid
Use in children and adolescents under 18 years has not been established due to lack of adequate data.
Pregnant women: avoid
Safety during pregnancy has not been established.
Breastfeeding women: avoid
Safety during breastfeeding has not been established.
Contraindications
Renal insufficiency: prohibited
Contraindicated in conditions where reducing fluid intake is recommended (e.g., severe heart or kidney disease).
