While I agree that sugar and alcohol can affect people in the same ways, I hesitate to jump on board with a "Holistic Nutritionist" who is suggesting many different supplements.
I don't believe supplements are the answer. Good nutrition is the key. Varied balanced meals, a little exercise.
I've had sugar and alcohol and depression and anxiety problems.
I still struggle with sugar if I buy treats. I know that if I buy them I'm likely to eat the whole thing as soon as I get it home, so I try to be gentle with myself. I buy them every-now-and-then, not three times a week. I make the decision at the store.
If I'm at some event or at someone's house I decline sugary treats. I use the, "It's not mine," rule for myself. If I didn't plan it, work it into my calories and buy it myself, I don't eat it.
Some people do the complete abstinence thing. I am not willing to live the rest of my life without sugary treats, so I manage it.