From Hippocrates to Harvard: 2,500 Years of Olive Oil Medicine

Long before clinical trials and peer-reviewed journals, physicians were prescribing olive oil. The history of its medicinal use stretches back two and a half millennia — a continuous thread from ancient Greek temples to modern research universities, with remarkably consistent conclusions at both ends.

Hippocrates: The Great Healer

Hippocrates of Kos, born around 460 BC, is often called the father of Western medicine. He was the first to systematically separate medical practice from religious superstition, insisting that disease had natural causes and natural remedies.

Olive oil was central to his pharmacy. The Corpus Hippocraticum — the collection of texts attributed to Hippocrates and his school — records over 60 medical applications for olive oil. These span an extraordinary range of conditions and specialities: dermatology, gynaecology, surgery, gastroenterology, and dentistry.

Hippocrates used olive oil to treat skin conditions, to clean and dress wounds, to ease muscular pain, and as a base for medicinal preparations. He recommended it for ulcers, for fevers, and for conditions of the stomach and intestines. In an era without antibiotics, antiseptics, or anaesthesia, olive oil was one of the most versatile tools available to a physician — soothing, protective, and, as we now understand, mildly antimicrobial.

What is remarkable is not just the breadth of these applications but their intuition. Many of the conditions Hippocrates treated with olive oil are conditions for which modern research has confirmed anti-inflammatory or protective benefits. He did not know about oleocanthal or polyphenols. He simply observed, over decades of practice, that olive oil helped.

Dioscorides: The Pharmacologist

Pedanius Dioscorides (40–90 AD), a Greek physician who served as a military doctor in the Roman army, wrote De Materia Medica — a five-volume encyclopaedia of medicinal substances that remained the authoritative reference in both Europe and the Islamic world for over fifteen hundred years.

Dioscorides was meticulous. His entries on olive oil include specific preparations for specific complaints: oil for back pain, toothache, and headaches. One particularly detailed recipe calls for the sediment of olive oil to be combined with unripe grape juice and cooked down to the consistency of honey — this preparation was recommended for decaying teeth.

Where Hippocrates prescribed broadly, Dioscorides prescribed precisely. His work represents the first systematic attempt to catalogue olive oil's medicinal properties with something approaching scientific rigour — careful observation, specific dosages, and repeatable methods.

Galen: Oil as Food-Drug

Galen of Pergamon (129–216 AD) was physician to Roman emperors and the most influential medical writer of antiquity after Hippocrates. His works dominated Western and Islamic medicine for over a thousand years.

Galen introduced an idea that was ahead of its time: olive oil as a "food-drug" — a substance that nourished the body while simultaneously treating disease. This concept, which might have seemed eccentric in the early twentieth century, is now mainstream in nutritional science. The idea that what you eat can be therapeutic is, in large part, the foundation of modern dietary medicine.

Galen prescribed olive oil for typhus, tetanus, eye and ear diseases, ulcers, and a range of other conditions. He was particularly interested in oil's capacity to strengthen the body's resistance to disease — an observation that anticipates, however distantly, our current understanding of the anti-inflammatory and immunomodulatory effects of olive oil's phenolic compounds.

Avicenna: The Canon of Medicine

The tradition continued east. Ibn Sina, known in the West as Avicenna (980–1037 AD), was a Persian polymath whose Canon of Medicine synthesised Greek, Roman, and Islamic medical knowledge into a single comprehensive system. The Canon was used as a medical textbook in European universities until the seventeenth century — roughly seven hundred years after it was written.

Avicenna prescribed olive oil across an astonishing range of conditions: digestive complaints, respiratory illnesses, skin disorders, pain, fever, and mental health conditions. His approach was systematic and graded — he classified oils by their quality and age, recommending different preparations for different purposes.

What is significant about Avicenna's work is its continuity with the Greek tradition. He had read Hippocrates, Dioscorides, and Galen, and he built on their observations rather than discarding them. The result was a medical tradition in which olive oil had been continuously prescribed for over fourteen hundred years — not out of dogma, but because successive generations of physicians observed that it worked.

Hildegard of Bingen: Medicine, Not Food

Hildegard of Bingen (1098–1179), a German Benedictine abbess, is often described as Europe's first female physician. She was also a composer, a theologian, a naturalist, and a visionary — in every sense of the word.

Hildegard's medical writings recommend olive oil as medicine rather than food — an interesting distinction that reflects both the climate of northern Europe (where olive oil was an expensive import rather than a kitchen staple) and her particular understanding of the body's needs. She prescribed it for external application and therapeutic use, treating it as a pharmacological substance rather than a dietary one.

This is a useful reminder that olive oil's medicinal reputation was not limited to the Mediterranean. Even in regions where the tree did not grow, where the oil had to be imported at considerable expense, physicians recognised its therapeutic value and prescribed it accordingly.

From Ancient Intuition to Modern Evidence

The thread that runs from Hippocrates to Hildegard — and onward to the clinical trials of the twentieth and twenty-first centuries — is not one of blind tradition. It is one of consistent observation. Each generation of physicians, working with the tools and knowledge available to them, arrived at similar conclusions about olive oil's capacity to heal.

Modern science has begun to explain why. The polyphenols in extra virgin olive oil — particularly oleocanthal and oleacein — have documented anti-inflammatory, antioxidant, and antimicrobial properties. The high oleic acid content supports cardiovascular health. The vitamin E content protects cells from oxidative damage. The mechanisms are becoming clearer with each passing year.

But the fundamental insight — that olive oil is good for you, in ways that go beyond simple nutrition — was established two and a half thousand years ago, on the islands and coastlines of the eastern Mediterranean, by physicians who had nothing but their eyes, their hands, and their patients.

The extra virgin olive oil produced on Crete today is made from the same Koroneiki olives that would have grown in Hippocrates' time, pressed in much the same way, yielding an oil rich in the same compounds his patients benefited from. At Eliato, we find a quiet satisfaction in that continuity.