Why Supplement?

I grew up on a farm and I remember how the cows would be sent out to the fields during the day to graze and in the evening they would come into the milking shed and would happily wait to be milked for some food. Farmers know that you need to feed the cows nutrient dense food, so that you get high quality milk at good prices. I remember the horses having a block that they licked, and this gave them nutrients. It was always kept next to the water trough. Just a little is all they needed.
I see supplementing our diet in the same way – if we want our bodies to be healthy and full of energy, we need to supplement. Sports people understand this – so should we!