Herbs and Spices

Since the earliest humans began to walk the earth, herbs and spices have functioned as far more than culinary seasonings; they have constituted nature’s original pharmacy, carefully observed, tested through trial and error, and revered for their capacity to soothe, strengthen and restore across widely differing cultures and climates.

Archaeological and chemical evidence now suggests that this relationship began tens of thousands of years before written records, when Neanderthal communities in what is now northern Spain deliberately selected and ingested plants such as yarrow and chamomile. Analysis of dental calculus from individuals who lived roughly fifty thousand years ago at the El Sidrón site has revealed residues of these bitter, nutritionally poor herbs, which possess little value as food yet are traditionally valued for their anti inflammatory, antiseptic and calming properties; the presence of a gene for bitter taste perception among these Neanderthals further implies intentional selection rather than accidental consumption, offering a compelling glimpse of early self medication in a landscape where survival depended on intimate knowledge of the plant world.

By the time sophisticated civilisations emerged along the great rivers of the Near East, herbal knowledge had been refined into systematic practice and preserved in durable records. In ancient Egypt, around 1550 BC, the Ebers Papyrus - a scroll more than twenty metres long containing roughly seven hundred remedies - documented the use of garlic, coriander, frankincense, aloe, juniper and many other plants for infections, digestive complaints, respiratory problems and even the preservation of the body in embalming. Garlic, in particular, was prized for its ability to impart vitality and strength; workers constructing the pyramids are said to have received regular rations of it, while its compounds provided mild antiseptic and digestive benefits that modern chemistry has partially confirmed. Coriander cooled and soothed irritated tissues, and frankincense resin addressed throat and lung complaints, yet these empirical preparations were frequently accompanied by incantations, reflecting a worldview in which physical and spiritual causes of illness were inseparable.

Parallel traditions developed independently yet with striking similarities of purpose. In Mesopotamia, clay tablets from the third millennium BC record hundreds of plant remedies, including liquorice root and fennel for respiratory and digestive ailments, administered under the patronage of healing deities such as Gula. In ancient China the foundations of Traditional Chinese Medicine were laid through the systematic classification of herbs according to taste, temperature and affinity for particular organs, with ginseng, ginger and liquorice employed to harmonise the flow of qi, the vital energy that was understood to animate the body and to maintain balance between opposing forces. India’s Ayurvedic system, whose earliest textual traces appear in the Vedas and which was later elaborated in the Charaka and Sushruta Samhitas, treated turmeric, ashwagandha and cardamom as means of reducing inflammation, building resilience and supporting longevity within a holistic framework that considered constitution, digestion and seasonal rhythm together. These great systems did not view plants as isolated chemical agents but as living allies capable of addressing both the physical symptoms and the deeper imbalances of body and spirit.

In the classical world of Greece and Rome, physicians began to organise this accumulated wisdom into more systematic treatises. Hippocrates, often called the father of medicine, emphasised the therapeutic power of diet and simple herbs such as thyme and peppermint for respiratory and digestive complaints, operating on the principle that the body possessed an innate capacity for healing when properly supported. Galen later produced extensive catalogues of simple drugs whose influence shaped European medicine for more than a thousand years, while Dioscorides’ De Materia Medica described hundreds of plants with practical precision that remained authoritative for centuries. Spices such as saffron and cinnamon, carried along the Silk Road, were valued both for their rarity and for their capacity to treat fevers and infections, illustrating how trade itself became a vehicle for medical knowledge.

During the Middle Ages European monasteries carefully preserved classical texts and cultivated physic gardens of sage, rosemary and lavender, whose aromatic and antimicrobial properties were put to practical use in an age of recurrent epidemic disease. Simultaneously, the Islamic Golden Age synthesised Greek, Persian, Indian and Chinese learning into a sophisticated pharmacology. Avicenna’s Canon of Medicine, a monumental work that became a cornerstone of medieval and early modern education, documented the medicinal applications of cloves, nutmeg, black pepper and dozens of other spices, many of which were imported from distant regions and treated as more valuable than gold. These aromatic substances were employed against plague, melancholy and a wide range of inflammatory conditions, while the regulated apothecary shops that appeared in cities such as Baghdad marked an important step toward the creation of the pharma industry.

The great spice trade of the fifteenth to seventeenth centuries accelerated this global exchange. European voyages of discovery introduced New World plants such as chilli peppers, whose active compound capsaicin is now recognised for its pain relieving properties, and vanilla, long paired by Indigenous Mesoamerican cultures with cacao for both flavour and energy. In turn, European apothecaries blended these newcomers with familiar Mediterranean herbs such as basil and oregano, while Indigenous peoples of the Americas contributed remedies such as echinacea, later adopted for immune support. The result was a vast, if often uneven and exploitative, circulation of botanical knowledge that enriched medical practice on every continent.

The nineteenth and twentieth centuries witnessed a decisive divergence between traditional herbalism and the emerging pharmaceutical industry, yet the plants themselves never ceased to matter. Chemists isolated active constituents - curcumin from turmeric for its anti inflammatory effects, allicin related compounds from garlic, and capsaicin from chilli - thereby translating ancient observations into molecular language. Contemporary research continues this dialogue. Ginger has been extensively studied for its ability to relieve nausea in pregnancy, chemotherapy and motion sickness. Turmeric and its principal curcuminoids have shown promise in laboratory models of inflammation and amyloid clearance, and some human trials, including a UCLA study of a bioavailable formulation, have reported improvements in memory and mood among older adults with mild age related complaints, while observational data from Asian populations link regular curry consumption with slower rates of cognitive decline; results in established Alzheimer’s disease remain mixed, however, and bioavailability challenges persist. Sage and rosemary, long associated in European folk medicine with clarity of mind, have demonstrated benefits for attention, working memory and alertness in several controlled trials, particularly when used by healthy adults or those with milder impairment, although larger and longer studies are still required. These findings do not restore every traditional claim, yet they confirm that careful observation of the plant world continues to yield clinically relevant insights.

From the earliest shamans and Neanderthal foragers to the modern laboratory, herbs and spices have accompanied humanity’s persistent effort to understand and harness the restorative power of nature. Their long history is both a record of empirical ingenuity and a reminder that many of the remedies we still value began as carefully chosen responses to the needs of the body and the spirit. Whether infused in a calming tea, incorporated into a daily meal, or examined under the microscope for their bioactive molecules, these plants continue to invite both wonder and rigorous inquiry.

Dementia Hub’s detailed examination of twelve common herbs and spices offers a practical starting point for anyone seeking to explore that invitation with the benefit of contemporary scientific evidence.