While a person’s age is usually counted by their date of birth, doctors also talk about biological age. This reflects how old the body really is based on physical and mental function, not just the number of years lived. Lifestyle, genetics, and daily habits all play a role, and a higher biological age is often linked to a greater risk of disease.

A study published in the journal Nature Aging explored whether simple daily habits could slow this internal aging clock. The research included 777 adults aged 70 and above, whose biological age was measured using epigenetic clocks tools that analyze aging at the cellular level.

Participants were divided into different groups. Some took fish oil capsules daily, others combined fish oil with vitamin D supplements, and one group also followed a routine of moderate exercise about 30 minutes, three times a week.

After three years, blood tests revealed a notable pattern. Individuals who took only fish oil capsules showed a slower rise in biological age, aging nearly two years and eight months less than expected. The effect was even stronger among those who paired fish oil with vitamin D and regular exercise.

Researchers noted that this trio of habits supplementation and physical activity also lowered the risk of chronic illness, cancer, and physical weakness.

Experts believe the key reason behind these benefits is a reduction in inflammation. Chronic inflammation speeds up biological aging, while lowering it helps protect cells and maintain overall health.

However, researchers cautioned that more studies are needed to confirm these findings and fully understand the long-term impact. They also advised people not to start supplements on their own and to consult a doctor first, especially older adults.

Still, the message is clear, small, steady habits may quietly shape how well we age not just how long we live, but how healthy those years truly are.