Have you ever noticed that as we age, we reach for a sweater or jacket more often, or that cold weather seems to feel colder than it used to? There’s actually real science behind that. As we get older, our bodies become less efficient at regulating temperature.

One reason is that we gradually lose some of the layer of fat beneath the skin that helps insulate us from the cold. At the same time, our blood vessels do not respond as quickly as they once did, making it harder for the body to redirect warm blood and maintain comfort.

Muscle mass also decreases with age, and muscles play an important role in generating heat. The less muscle mass we have, the less natural heat our bodies produce. On top of that, metabolism tends to slow down over time, which means the body generates less heat overall.

Certain medical conditions can make sensitivity to cold even more noticeable. Poor circulation, thyroid disorders, anemia, diabetes, sudden weight loss, and some medications can all contribute to feeling colder more easily. That is why many older adults prefer warmer homes or wear extra layers, even when younger family members feel perfectly comfortable.

It is also important not to ignore a major change in cold tolerance, especially if it develops suddenly or is accompanied by symptoms such as fatigue, dizziness, shortness of breath, or sudden weight changes.

In many cases, increased sensitivity to cold is simply part of aging. But sometimes it can signal an underlying medical issue that deserves attention.

So if you find yourself reaching for an extra blanket more often as the years go by, you are probably not imagining it. Aging changes the way the body handles temperature, and for many people, cold simply feels colder.