Tangaek — Decoctions · Trees
槲若 Gogyak (곡약)
Gogyak is the leaf of the daimyo oak. The text points out that 若 simply means leaf, and the Korean name tteokgalnamu comes from wrapping rice cakes in those broad leaves. The same passage runs on to poplar bark (白楊樹皮) and sappanwood (蘇方木), the dyewood that gives a red bath.
Original, read line by line 東醫寶鑑 · Tangaek — Decoctions vol. 3
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性平, 味甘苦, 無毒. 療血痢. 主痔, 止渴.
Its nature is neutral, its taste sweet and bitter, and it is non-toxic. It treats hyeolri (血痢, bloody dysentery). It chiefly governs piles and stops thirst.
HomiclubGogyak is the leaf of the tteokgal oak. Its name comes from the broad, thick leaves once used to wrap rice cakes, and the way its dead leaves cling to the twigs all winter is the clue by which the tree is known.
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取葉炙用, 若卽葉也.
Take the leaves and roast them for use; yak (若) means the leaf itself.
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樹皮味苦澁, 除蠱及瘻, 治惡瘡.
The bark is bitter and astringent in taste; it removes go (蠱, gu infestation) and ru (瘻, fistula) and treats malign sores.
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與櫟相類, 亦有斗, 但小不中用. 不拘時採用. 《本草》
It resembles the yeok oak and likewise bears cups, but they are small and not fit for use. Gather and use it without regard to season. 《Boncho (本草)》
Trees — more entries
This is a cultural and historical record from a classical text, not a claim about any food’s effects. Nothing here is a health supplement or intended to prevent or treat disease. Consult a medical professional about health concerns. · Text: Korean Medicine Classics DB · Reading: Homiclub