Nikolay Bondarenko

Before summer, some people more often notice a runny nose, fatigue, a “general feeling of unwellness,” mild cold-like symptoms, or worsening of allergies. This may be related to seasonal infections, increased levels of allergens, and changes in environmental conditions. A short or mild episode on its own does not necessarily indicate a health problem, but […]

Immunity in spring works differently: the risk of colds does not disappear and may even increase. Temperature fluctuations, changes in humidity, residual vitamin D deficiency after winter, and circadian rhythm shifts create conditions in which the body temporarily becomes more vulnerable. In most cases, this is not “weak immunity” but normal adaptation. During the spring […]

Spring sleep is often disrupted: it becomes harder to fall asleep, waking times shift, and in the morning the feeling of rest is gone. Sometimes this appears as mild spring insomnia or poor sleep in spring, when even a sufficient night’s sleep does not restore energy. It seems like there should be more light and […]