Walnut - Research
There are a few human clinical intervention trials that show a heart healthy diet with walnuts can lower blood cholesterol levels.15 One human clinical study suggests Juglans regia chewing sticks are effective as an aid in maintaining oral hygiene due to antibacterial properties.16
The German Commission E has approved walnut leaf for external use in mild, superficial inflammations of the skin and excessive perspiration of the hands and feet.13
ince the meat of the walnut appears to be shaped like a human brain, some traditional, plant-based medical systems used them to treat brain injuries and mental illness.1 In India, a leaf decoction was used as a wash for malignant sores and pustules.6 Traditional Chinese medicine used a tonic internally for weak kidney energy.2 Walnuts have also been used internally for gastrointestinal, skin, circulatory, and lung conditions.2,3,5,10 In folk medicine, it was considered a “blood purifier” and was believed to eliminate worms, poison, and anemia.10,13
In traditional medicine, walnut leaves were used externally in bathing, dressing, and/or rinse forms as an astringent and emollient for various skin conditions such as acne, eczema, herpes, fungal infection, itchiness, inflammation, burns, hair loss, ulcers and perspiration.2,3,5,6,10 A decoction was made for bedbugs and lice.3
1 Wood R. The New Whole Foods Encyclopedia: A Comprehensive Resource for Healthy Eating. New York: Penguin Putnam Inc; 1999.
2 Bown D. The Herb Society of America New Encyclopedia of Herbs and Their Uses. London: Dorling Kindersley Ltd.; 2001.
3 Van Wyk BE, Wink M. Medicinal Plants of the World. Portland, OR: Timber Press; 2004.
4 Onstad D. Whole Foods Companion: A Guide for Adventurous Cooks, Curious Shoppers & Lovers of Natural Foods. White River Junction, VT: Chelsea Green Publishing Company; 1996.
5 Bruneton J, ed. Pharmacognosy, Phytochemistry, Medicinal Plants. 2nd ed. Paris: Lavoisier; 1999.
6 Blumenthal M, Goldberg A, Brinckmann J, eds. Herbal Medicine: Expanded Commission E Monographs. Austin, TX: American Botanical Council; Newton, MA: Integrative Medicine Communications; 2000.
9 Davidson A. The Oxford Companion to Food. London: Oxford University Press; 1999.
10 Wichtl M, Brinckmann J. Herbal Drugs and Phytopharmaceuticals. Stuttgart: Medpharm GmbH Scientific Publishers; 2004.
11 Arctander S. Perfume and Flavor Materials of Natural Origin. Carol Stream, IL: Allured Publishing Corporation; 1994.
12 D’Amelio FS. Botanicals: A Phytocosmetic Desk Reference. Boca Raton, FL: CRC Press LLC; 1999.
13 Blumenthal M, Busse WR, Goldberg A, Gruenwald J, Hall T, Riggins CW, Rister RS, eds. Klein S, Rister RS, trans. The Complete German Commission E Monographs Therapeutic Guide to Herbal Medicines. Austin, TX: American Botanical Council; Boston: Integrative Medicine Communication; 1998.
14 Tyler VE, Robbers JE, eds. Tyler’s Herbs of Choice. 2nd ed. Binghamton, NY: Haworth Herbal Press; 1999.
15 Feldman EB. The scientific evidence for a beneficial health relationship between walnuts and coronary heart disease. J Nutr 2002;132(5):1062S-1101S.
16 Jagtap AG and Karkera SB. Extract of Juglandaceae regia inhibits growth, in-vitro adherence, acid production and aggregation of Streptococcus mutans. J Pharm Pharmacol. 2000;52(2):235-42.