[Lotus]

Losing weight will mean losing volume, vice versa too. You can add contour by adding in a certain strength training for breasts called isometrics. Which if you strengthen the sides (inside and outside walls) and upper poles you'll see definition. Think gymnastics for the breasts, lol. Add the proper amount of proteins, healthy fats, veggies, fruit, filtered water etc, and it's a good start. And judging from what you stated you should add omega 3 (chia seeds is good source).