How do herbs work?

Sometimes it can feel like magic, but it isn't. It's chemistry. An individual plant may be comprised of hundreds of different chemical compounds, all of which have unique and synergistic qualities. For instance, when you drink a hot mug of chamomile tea after a stressful day, the compound apigenin binds to the same brain receptors commonly targeted by anti-anxiety medications. Bitter compounds in plants like dandelion root and artichoke leaf bind with specialized receptors throughout your digestive system, triggering a cascade of responses through the vagus nerve that increases the production and release of digestive secretions, a mechanism called increasing digestive fire.

It's not just chemistry, though. There's also something called the meaning effect, which applies equally to herbal medicine and pharmaceuticals. Your beliefs, expectations, and the entire context of your healing shape your physiological responses to interventions and create definable neurochemical changes. This is not the placebo effect; this is the complexity of human beings with all of our interconnects parts influencing each other.

Modern pharmacology often extracts specific desirable compounds from plants to produce new medications. For instance, French lilac, or goat's rue, was traditionally used for diabetes. Scientists identified the active constituent galegine, then modified it to create metformin, the most commonly prescribed medication for diabetes. Spoiled sweet clover was observed to cause bleeding in cattle, which led to the identification of coumarin compounds, now sold as the blood thinner warfarin.

Herbalists generally prefer to use the whole plant because the synergy of the different compounds is greater than the sum of its parts. For instance, willow bark contains salicin, the precursor to aspirin, which is effective at reducing pain, headaches and fevers, and it also contains other compounds - mucilaginous polysaccharides that coat the gastric mucosa and flavonoids that are anti-inflammatory, thereby providing its main benefit of pain relief while also offering protection from potential side effects. The whole plant has built-in buffers making them safer to use and reducing, if not eliminating, side effects.