Vitamin D is fat-soluble, so with meals—most notably, those containing healthy fats—the absorption improves. A healthy breakfast or lunch accompanied by your supplement optimizes its performance and promotes improved overall health results. Because vitamin D is fat-soluble, pairing it with foods such as avocado, nuts, eggs, or olive oil-based foods increases absorption. A balanced diet with these healthy fats improves the supplement’s bioavailability and effectiveness.