Will smoking give me a deeper voice

No. It can give your voice a more gravely sound but as far as I know won't actually lower the pitch.

At your age though, there are some things you can do to lower your voice.

Science is quite clear that a deep voice is the result of hormones in the body - high male hormones (like testosterone), low female hormones (like estrogen), and low stress hormones (like cortisol)

You can raise testosterone through diet. Male hormones are made from certain kinds of fat in the diet. The right kinds of fat for raising testosterone come from:
Olives, olive oil, avocados, meat, eggs

Other kinds of fat will have the wrong effect, lowering testosterone:

Vegetable oil, dairy, seeds, certain nuts

A large supply of nutritients also helps in the production of male hormones. The most nutritious foods are vegetables, particularly green leafy vegetables like spinach.

Also, dairy products contain estrogen and have been shown to decrease all male hormones and increase all female hormones in men, so you should keep milk and cheese to a minimum.

/r/singing Thread