About Us

Meet Our Experienced Medical Staff

Dr. Mohamed Ali, M.D. is a Board Certified Internal Medicine Physician.

He has been in practice since 2001 in the Inland Empire and hails from Rochester, New York. He completed his residency at the University of Rochester, New York where he was awarded the coveted and prestigious distinction of chief medical resident.

He is an academician as well as a clinician. Dr. Ali divides his time between providing quality medical care for his patients in private practice and teaching medical students and residents at Pomona Valley Hospital's Family Medicine program, affiliated with UCLA School of Medicine.

His interest in weight loss started when one of his regular patients came to his office in tears, fearing that her husband would divorce her because she was overweight. Dr Ali helped her lose 55 lbs. and keep her marriage.*

Word-of-mouth spread and Hi-Pro (now Medi-Slim) Diet was created. Our company is based on the belief that our customers' needs are of the utmost importance. Our entire team is committed to meeting those needs. As a result, a high percentage of our business is from repeat customers and referrals.

We welcome the opportunity to earn your trust and deliver you the best service in the industry.

Dr. John Vanderhulst, M.D.

Dr. Vanderhulst attended Jefferson Medical College in Philadelphia, Pennsylvania. After medical school, he practiced general medicine for thirty-six years with a medical group in the Downey area of Southern California.

While Dr. Vanderhulst was a physician, he also went to law school and graduated from Western State University, College of Law, located in Fullerton, California. He passed the California Bar exam in 1989 and has an active law license along with his medical license.

After a short retirement from practicing medicine, Dr. Vanderhulst met with Dr. Mohamed Ali and was impressed with his medical weight loss program so much that he returned to medicine at the Claremont Medi-Slim Wellness office.

The successes that he has seen at Medi-Slim Wellness are amazing. As a physician Dr. Vanderhulst feels it is just as rewarding to practice preventive medicine by helping people avoid the metabolic diseases that are caused by obesity.

*The results described are based on strict adherence to our program. Individual results may vary.