2. Long Transit Time for Delivery . Have you noticed an increasing amount of produce finding its way to your grocery store comes from other countries? If you think your favorite mango or pineapple (from Hawaii or the Philippines) was just cut at its peak ripeness, then immediately boxed, rushed to the airport and shipped overnight to your favorite grocery store, you’re sadly mistaken. Sometimes, foods are picked weeks and even MONTHS before we see it on our shelves. So much for obtaining the maximum amount of nutrition! I always suggest that my clients buy as much of their food as possible from local growers to reduce transit time and improve the nutritional value of the food they’re eating.