Is It Possible to Naturally Lift Breasts?

The best option if you really don't want to undergo surgery is to make an investment in excellent undergarments. See a qualified bra fitter. You would be amazed at the outcome you can find when the proper bra is selected and worn properly. Good luck.

Unfortunately, there is no scientifically proven non-surgical method, such as pills or exercises, that can naturally lift breasts. The reason for this is that breast tissue itself is not muscle, and exercises can only tone the underlying pectoral muscles, not affect the shape or firmness of the breast tissue. Although exercises like chest presses or push-ups can help improve the appearance of the chest area by building muscle, they won't significantly lift or firm the breasts themselves. Additionally, products like herbal pills or topical creams that claim to lift the breasts have not been shown to work effectively.
For a more immediate, though temporary, solution, wearing a well-fitting bra, such as a push-up or lift bra, can provide significant lift and shape. A professional bra fitter can help you find a style that works best for your body, offering a comfortable and supportive fit. Non-surgical treatments tighten the skin slightly, but the results are generally subtle and temporary. For lasting and more dramatic results, a breast lift (mastopexy) surgery is the most effective option. If surgery is not currently an option, focusing on proper support can be helpful in the meantime.
Krishna Vyas, MD, PhD, MHSHarvard, Hopkins, & Mayo Clinic Trained Aesthetic Plastic SurgeonNew York, New York

Breasts
droop and descend because the skin envelope is not mechanically strong enough
to withstand the weight of the breast. 
There is a new technique called The Bellesoma Method, which transfers
the weight of the breast to the underlying pectoralis major muscle.  Vertical scars are avoided and nipple
sensation and the ability to breast feed are maintained.  This technique is all natural, no foreign
body, meshes, implants or artificial materials are used.Best Wishes,Gary Horndeski, M.D.