Book Available latest edition

​​3rd Edition Coming Soon

​​​​CHI is excited to announce the sale of Hormone Optimization
in Preventive / Regenerative Medicine. 2nd Edition

A Guide for the “Nuts and Bolts” of Preventive / Regenerative Medicine.

by Ron Rothenberg, MD
Kris Hart, MN, FNP, RN-C 
and Roger Rothenberg, BA

       Hormone Therapy

The definition of a bio-identical hormone is simply a hormone that is atom for atom the same hormone that is endogenously produced in the human body. It is produced in a lab from the active ingredients of the wild yam and it looks and acts just like our natural hormone.

Program Benefits


Many patients experience the following benefits:

​ hormone optimization regenerative medicine bioidentical hormone replacement therapy

  • Enhanced Energy
  • Increased Mental Function
  • Improved Immune System
  • Enhanced Sexual Energy
  • Improved Physical Appearance
  • Improved Cardiac and Diabetic Risk Profile

DNA & Telomere Science

Dr. Rothenberg along with  T.A. Sciences®  is focused on the aging process at a cellular level, through the science of Telomerase Activation.
Telomeres are the caps at the end of each strand of DNA that protect our chromosomes, like the plastic tips at the end of shoelaces. Telomeres get shorter as we get older, which leaves DNA unprotected and causes cells to age.

Click the photo for more information.

Comprehensive text book for physicians, comprehensive book for consumers, complete with treatment guidelines, abstracts and algorithms.

Sold at Amazon  or our office has a limited quantity of books

To order your copy contact us at 800.943.3331

20 Years of  Promoting Quality of Life 

​​​​​​​​​​​​The Trusted Source for Preventive / Regenerative ​Medicine

​​​320 Santa Fe Drive, Suite 211

Encinitas, CA 92024



​​​​​​​​​California HealthSpan Institute      

Anti-aging Medicine is Preventive / Regenerative Medicine and we seek to prevent, reverse and manage the process of aging by replacing and balancing your natural hormones.

Your future Vitality is waiting at California HealthSpan  

New... Peptide Hormone Therapy

This new therapy offered as an enhancement to your hormone program. There are many peptide combinations that may offer amazing results.

The definition of a peptide is chain of amino acids specifically designed to fit into your own receptors to produce a desired effect.  Like a key fits into a lock unlocking the response it was designed for. 

​​​Preventive/Regenerative Medicine


Is solidly based on data in the medical literature and clinical experience of MD specialists in the field.

We offer our patients programs that are both cutting edge and based on the documented benefits of traditional medicine and integrative medicine.

Supplements & Micro-nutrients

There is a broad spectrum of supplements and micro-nutrients that are recommended by CHI.

  • Metabolism

  • Reduce Inflammation

  • Support Brain Function

  • Repair DNA

  • Boost Immune system

  • Decrease Risk of Heart Attack

and so much more ...