Walking through the vitamin and supplement aisle at your local supermarket can be an overwhelming experience. Since most stores aren't stocked with experts to help you navigate the products, it can be impossible to know what to take to improve your health. The homeopathic company Boiron has taken a high-tech step so you can figure out what you need on your smartphone. The free app answers simple questions, like if you're looking for natural help with allergy, cold and flu, eye care or digestive problems. Then it asks for symptoms and offers a product option that will work for you.