Whole foods provide a range of nutrients that work synergistically to support overall health. This synergy is often lost in synthetic vitamins, which are typically isolated compounds. For example, spinach is rich in iron, but it also contains vitamin C, which enhances iron absorption. This natural combination is more effective than taking iron or vitamin C in isolation.

For dogs, consuming a diet rich in whole fruits and vegetables ensures they receive a broad spectrum of nutrients that work together to support their health. Apples, for example, contain vitamin A, vitamin C, and fiber, all of which contribute to a healthy immune system, skin, and digestive tract. The combined effect of these nutrients is more potent than any single nutrient alone.