Also Sugar is an essential drug, you'd die without it (Hypoglycemia). it is just simply we over consume it on the most part today.
As your attorney...
Nicotine (aka vitamin B3) is also an essential food supplement. That doesn't mean that we'll get sick if we don't smoke.
Our bodies are perfectly capable to turn polysaccharides (from potatoes, rice, wheat, maize, meat...) into all the sugar we need.
Any form of refined sugar is essentially too much.