Supplements are formulated for the average person and it's assumed that the average American eats a lot of animal protein and starches and only very small amounts of healthy vegetables.

So the formula Ocuvite, for example, seeks to address a supposed deficiency. Lutein and Zeaxanthin can be found together in dark leafy greens, and balanced by nature. These two can be found in cooked kale, collard greens, turnip greens and spinich. One cup provides a lot of nutrition, including fiber. The above vegetables represent the richest sources but there are many other vegetables that will provide these nutrients.

Also in the formula is Omega-3 fatty acids: This assumes you eat a lot of animal protein that is rich in omega-6. So the omega-3 is to help provide some balance. You could provide the same by having a few servings per week of some cold-water fish like salmon, sardines or mackerel.

Vitamin E: Nuts

Vitamin C: Fresh fruit etc.

Zinc: Almonds, peanuts, cashews, garbanzo beans, baked beans, Mozzarella, chicken breast and many other animal foods.

The bottom line: Recommending a supplement assumes you are not eating a nutritious diet.