In everyday cooking, spices are often treated as flavor additions. But biologically, spices function more like regulators than seasonings. Certain spices influence very specific processes: some affect microcirculation near the skin, others alter bile flow, bacterial balance, stress hormones, or neurotransmitter activity. These effects depend not only on the spice itself, but on timing, dosage, and context — whether it’s consumed with fats, heat, or during stress. Unlike macronutrients, spices wo