How phytochemicals influence the bioavailability of nutrients:

Components of plant foods such as phytochemicals can play an important role in shaping the bioavailability of nutrients during digestion and absorption. Certain compounds may enhance nutrient release, micellarization, and transport across the intestinal epithelium, while others can bind nutrients or interfere with digestive enzymes and bile acids, reducing uptake. These interactions highlight that the nutritional value of plant foods is determined not only by nutrient content, but also by the surrounding chemical matrix that modulates how efficiently those nutrients are utilized by the body. We are particularly interested in how phytochemicals and plant matrix components impact the bioavailability of carotenoids (some are vitamin A precursors) and iron.