You can and do choose how your Cells transform.
The membrane of every cells has Energy Potential. It's the interaction with surrounding energy that creates the shift. Your choices give you full management of how you drive the cells - potential versus degradation.
Taking this responsibility personally is the primary aim of Self Healing. The steps to gain this are expounded in Cellular Transformation Therapy©.
My book Change Your Cells Change Your Life explains the link between biology and the energetic field and the Guided Techniques called Awake Aware Alight© take you through gentle activations.
By repeating each technique, your mind recognises the feelings, integration takes place and you are then able to monitor and maintain your cell's environment for maximum wellbeing.