Up your weight-bearing and cardio exercise for a real boost, I'd say.
As far as nutrition is concerned:
For zinc, add in peas, beans, brown rice, spinach, tofu or tempeh.
For calcium, add in more green leafy vegetables, calcium-fortified tofu, soy milk, and orange juice
OR Just have a delicious Kashi GoLean Vanilla shake (Trader Joe's has the powder and it's really nutritious and delicious!) made with a light soy milk fortified with calcium as a tasty meal replacement (which is about 300 calories this way).
"Yes! Live! Life's a banquet and most poor suckers are starving to death!" Auntie Mame