Oak: benefits, dosage, contraindications
Other name(s)
White oak
Scientific name(s)
Quercus pedunculata, Quercus robur, Quercus petraea, Quercus pubescens
Family or group:
Plants
Active ingredients:
Saponins
Tannins
Pectin
Indications
Scoring methodology
EFSA approval.
Fatigue ✪✪✪✪✪
Some preliminary clinical studies conducted on a patented Robuvit® oak bark extract (Quercus robur) show improvements in fatigue and markers of oxidative stress.nnIn another study, the same extract was investigated. 70 women were divided into two groups: one group received 300 mg/day of Robuvit® and the other a placebo, for 8 weeks. After 4 weeks, a significant improvement in general and mental health was observed in the Robuvit® group compared with placebo. nnIn gemmotherapy, oak is recommended for fatigue or overwork and during convalescence. The buds are said to have a regenerative and stimulating effect on the adrenal glands.nn
Posologie
Oral: buds, bark
300 mg
Gemmotherapy, standardized extract
The Oak-wood Extract Robuvit® Improves Recovery and Oxidative Stress after Hysterectomy: A Randomized, Double-blind, Placebo-controlled Pilot Study
Improvement in mood, oxidative stress, fatigue, and insomnia following supplementary management with Robuvit®
Robuvit® and endurance in triathlon: improvements in training performance, recovery and oxidative stress
Rejuvenate our tissues with buds. Dr. MAX TETAU, Dr. DANIEL SCIMECA
Constituents and Metabolites of a French Oak Wood Extract (Robuvit®) in Serum and Blood Cell Samples of Women Undergoing Hysterectomy
Sexual disorders ✪✪✪✪✪
The oak bud is known for its effect on sexual disorders: as a stimulant, it can be used to combat male impotence, frigidity, and lack of libido (sexual asthenia).nn
Posologie
Oral: buds, bark
300 mg
Gemmotherapy, standardized extract
Diarrhea ✪✪✪✪✪
Bark has long been used as an astringent remedy for diarrhea, vomiting, bleeding... The EMA indicates that oak bark is used for the symptomatic treatment of mild diarrhea.
Posologie
Oral route: bark
560 mg
herbal tea/tea/infusion, aqueous decoction, dry extract
Stomatitis ✪✪✪✪✪
The EMA indicates that oak bark is used for the symptomatic treatment of minor inflammations of the oral mucosa or the skin.
Posologie
Buccal route: bark
560 mg
herbal tea/tea/infusion, aqueous decoction, dry extract
Hemorrhoids ✪✪✪✪✪
The EMA indicates that oak bark is used for the symptomatic relief of itching and burning associated with hemorrhoids.
Posologie
Sitz bath: bark
560 mg
herbal tea/tea/infusion, aqueous decoction, dry extract
Properties
Hormonal metabolism
In gemmotherapy, buds are used as an adrenocortical stimulant. A patented oak wood extract from the species Quercus robur (Robuvit®) is obtained by water extraction. It contains a mixture of antioxidants, ellagitannins, roburins, and bioflavonoids. This extract acts at the cellular level on mitochondria through its metabolite, Urolithin A, which activates mitophagy (degradation and recycling of mitochondria) for mitochondrial regeneration. It also has effects on muscle growth and protein synthesis, thanks to Urolithin B, and reduces oxidative stress by increasing the antioxidant capacity of blood plasma. In terms of clinical effects, the use of Robuvit® has shown improvements in sleep, athletic performance, reduction of chronic fatigue symptoms, mood enhancement, erectile function, and recovery after surgery.
Usages associés
The Oak-wood Extract Robuvit® Improves Recovery and Oxidative Stress after Hysterectomy: A Randomized, Double-blind, Placebo-controlled Pilot Study
Constituents and Metabolites of a French Oak Wood Extract (Robuvit®) in Serum and Blood Cell Samples of Women Undergoing Hysterectomy
Antioxidant
Laboratory research has suggested that these antioxidant activities play a role in the anti-inflammatory effects. In humans, the use of a specific oak wood extract (Robuvit) increases the total antioxidant capacity of the blood, probably by increasing antioxidant enzyme activities. Lipid and protein oxidation is reduced. These antioxidant activities are thought to play a role in the various clinical effects observed in clinical research, including the reduction of edema, fatigue, and liver damage. nnThe antioxidant effects of the oak bark extract may also play a role in improving physical performance and increasing energy in aging individuals. nnThe antioxidant activity of oak leaves has also been demonstrated in laboratory models and may be superior to that of oak bark.nn
Absorption, metabolism, and effects at transcriptome level of a standardized French oak wood extract, Robuvit, in healthy volunteers: pilot study
Antioxidant characterization of oak extracts combining spectrophotometric assays and chemometrics
Anti-inflammatory
Oak has a cortisone-like action; it is used for gastrointestinal inflammation. nn
Usages associés
Astringent
The tannin content of oak bark contributes to its astringent properties. nn
Safe dosage
Adults aged 18 years and over: 300 mg - 560 mg (dry extract)
Oral use of oak bark is safe in adults for a duration of 3 to 4 days, particularly for the treatment of diarrhea. By mouth: - 3 g in 250 mL of water, 3 times per day. - 1 g of powder in capsules, 3 times per day. - Dry extract 140 mg; 4 times per day. For mouthwash: - Decoction 20 g per liter of water. For sitz bath: - 5 g per liter of water, bath duration 20 minutes.
Precautions
Child up to 18 years: avoid
Use in children and adolescents under 18 years is not recommended.
Pregnant women: avoid
In the absence of sufficient data, use during pregnancy and breastfeeding is not recommended.
Breastfeeding women: avoid
In the absence of sufficient data, use during pregnancy and breastfeeding is not recommended.
Liver disorders: avoid
Theoretically, oral use of white oak bark could worsen liver dysfunction.
Renal insufficiency: avoid
Theoretically, oral use of white oak bark could worsen a renal disorder.
