The cold has arrived, bringing with it the irresistible urge to wrap up in a blanket, sip a hot cup of tea, and postpone everything on the day’s list. This impulse is completely understandable — the human body reacts in very real ways to the changes in temperature and light that winter brings. But beyond the momentary comfort, what does science tell us about how to take good care of our health during the colder months of the year?

In Brazil, winter has quite varied characteristics depending on the region: while the South and Southeast face low temperatures and dry air, other regions experience only a decrease in humidity and rainfall. In all these situations, however, the body needs extra attention. Respiratory infections, dry skin, mood changes, and drops in immunity are common complaints that tend to intensify during this period.

The good news is that some consistent — and accessible — habits can make a real difference in well-being during winter. This article gathers evidence-based guidelines to help you get through the cold with more health, energy, and balance. Always remember: the information here is educational and general; for specific guidance on your case, it’s best to talk to a healthcare professional.

Why Does Winter Affect Our Bodies?

The cold provokes real physiological responses in the body. One of them is vasoconstriction — the narrowing of blood vessels to conserve body heat, which can increase demand on the cardiovascular system. Moreover, reduced sun exposure decreases the production of vitamin D, essential for various body functions, including bone health and immune system function.

Lower light levels also interfere with circadian rhythms and the production of serotonin and melatonin, hormones directly linked to mood and sleep. Studies published in psychiatric journals suggest that part of the population experiences more pronounced mood variations in winter, with symptoms such as excessive tiredness, a craving for more carbohydrates, and difficulty concentrating. This phenomenon, known as Seasonal Affective Disorder (SAD), varies in intensity and deserves clinical attention when it significantly affects daily life.

Understanding these reactions helps make more conscious health decisions — not out of fear, but out of care.

Nutrition in the Cold: Nourishment That Comforts and Strengthens

In winter, it’s natural for appetite to increase slightly and for the preference for warmer, more caloric foods to intensify. This is a biologically understandable response. The challenge is to embrace these preferences without abandoning variety and dietary balance.

Some general guidelines that usually contribute to healthy eating in winter: