Back to the list of herbs

Oak (bark)

Safe

Quercus cortex

Energy
Cooling
Forms
Infusion, Maceration, Tincture
Min. dosage
1 – 3 g

Planetary correspondences

Saturn50%
Jupiter80%

Esoteric description

Essence of the Old Guardian: Quercus robur

Oak is the axis of the world, the Axis Mundi, the embodiment of the unwavering will and power of Jupiter. In the Hermetic tradition, it represents the masculine principle of the earth, the structure that protects life, and longevity.

Occult and Planetary Correspondences

  • Planet: Jupiter (expansion, order, authority).
  • Element: Earth (with stability and protection).
  • Archetype: Sage, Protector, King.
  • Spagyric Significance: Oak bark represents the "Salt" (body) of the plant. In alchemy, it is used to strengthen the "philosophical vessel" of the soul. Oak extracts are used in rituals to create boundaries, protect against astral parasites, and strengthen personal authority.

Biochemical Profile

Oak bark is a complex system of organic compounds that provide the plant with protection against parasites and decay, which directly correlates with its astringent and antiseptic effect on the human body.

  • Tannins (gallotannins and ellagitannins): Comprise up to 20% of the composition. These polyphenols possess a pronounced tanning effect. Biochemically, they form a durable film of denatured proteins on mucous membranes, preventing the penetration of pathogens and arresting inflammatory processes.
  • Quercetin: A flavonoid with powerful antioxidant and anti-inflammatory effects. It stabilizes mast cell membranes, reducing histamine release (anti-allergic effect).
  • Pectins and pentosans: Polysaccharides that facilitate detoxification and the binding of heavy metals in the gastrointestinal tract.
  • Ellagic acid: Possesses cytostatic potential, protecting the cellular genome from damage.

Synergy: From Matter to Spirit

In the spagyric process, the "calcination" of oak bark allows for the extraction of pure mineral salts (Salt), which in small doses serve as a catalyst for tissue regeneration. The biochemical mechanism of the astringent action of tannins is a physical reflection of the occult principle of "binding"—the oak does not allow life force to dissipate, holding it within the structure, whether it be the skin, the mucous membrane, or the human energy field.

Favorable days calendar

Day highlighting for working with “Oak (bark)” by the Moon, aspects, and planetary plant weights. Brighter means a more favourable day.

May 2026

PlantOak (bark)— taken into account in the estimation of days and percentages on the grid
Mon
W
Wed
Thu
Fri
Sat
Sun

Cautions

Contraindications

  • constipation
  • Pregnancy
  • severe kidney disease

Interactions

  • may reduce absorption of alkaloids
  • may reduce absorption of iron supplements