They are high in antioxidants, although those that are produced commercially generally come with chemicals and such that aren t so good for you. Canned fruits and vegetables come with high levels of sugars and calories, which antioxidant supplements don t have. The supplements offer you the levels you need, without any chemicals, sugars, or calories. A prolonged deficiency in vitamin A can put you at a risk for cancer as well, and you ll also miss out on any effects of anti aging that the vitamin might have. Although you should begin taking it immediately if you have a deficiency, the effects wouldn t be the same as they would be if you stayed up to date with the right amount on a daily basis. Manufacturers that are GMP compliant will always follow the manufacturing standards of zinc, in order to minimize and quite possibly eliminate the risk of contaminants that you could be getting from the supplement. If you choose your supplement wisely, you shouldn t have to worry about any problems. You can buy zinc supplements at GNC, online, or other nutrition stores. If you are looking for a supplement value, the coq10 offers you a high level of antioxidant value. Although fruits and vegetables are the best sources for antioxidants, the problem with them is that they are produced by the use of chemical herbicides, pesticides, and different types of fertilizers. Over the years, studies have shown that fruits and vegetables which are organically grown are high in antioxidants, and boast a much higher concentration than those that have been produced commercially. Even though you can look for vitamins that provide energy, it would be in your best interest to find those that can be effective with fighting fatigue as well. There are vitamins, nutrients, and supplements that are great for fighting fatigue and helping the body stay alert. The vitamin known as NADH is very powerful for energy, although many people aren t aware of it. There are studies however, that have proven vitamin E to be very effective in protecting the skin against UV rays. Vitamin E has been shown on numerous occasions to shield the skin from the harmful rays of the sun, which as we all know, can lead to skin cancer. If you include sources of vitamin E, or supplements in your diet you can help to prevent the damage of UV rays to your skin.