Study Protocol Optimized Complementary Feeding Study (OTIS) A Randomized Controlled Trial Of The Impact Of A Protein Reduced Complementary Diet Based On Nordic Foods

This study examines how different feeding approaches during a baby's first transition to solid foods (ages 6-18 months) might impact their long-term metabolic health. Researchers are comparing the standard Swedish infant diet to a "Nordic foods" approach that emphasizes more fruits, berries, vegetables, whole grains, and fish, while reducing protein intake by 30% and limiting dairy, meat, and sweets.

The researchers believe that what babies eat during this critical transition period has lasting effects on their health. High protein intake and low consumption of fruits, vegetables, and fish during infancy may increase the risk of obesity, type 2 diabetes, and unhealthy cholesterol levels later in life. The Nordic diet approach aims to establish healthier eating patterns early and potentially prevent these metabolic problems.

The study measures several important health markers including body composition (how much fat versus muscle babies have), blood markers related to inflammation and metabolism, gut bacteria composition, and blood pressure. Researchers are also tracking how well children accept new healthy foods and monitoring their cognitive development, since fish and certain milk components may support brain health.

If successful, this research could reshape how we think about infant nutrition and its role in preventing chronic diseases. The findings may influence feeding recommendations not just in Sweden but globally, potentially helping establish eating patterns that support metabolic health throughout life. For clinical practice, this research reinforces the importance of early nutrition interventions and suggests that optimizing infant feeding could be a powerful tool for preventing metabolic dysfunction and promoting longevity.