Controlled-release refers to a method of delivering medication or nutrients in a way that allows them to be released slowly over time. This approach helps maintain consistent levels of the substance in the body, improving effectiveness and reducing side effects. It is commonly used in pharmaceuticals, where patients benefit from fewer doses throughout the day. This technique can also apply to fertilizers in agriculture, where nutrients are released gradually to plants. By using controlled-release systems, both healthcare and farming can achieve better results, enhancing patient care and crop yield while minimizing waste and potential harm.