About Dr. John Marshall, MD
Dr Marshall is Board Certified in Family Medicine and has had a distinguished career in the US Air Force Medical Corp, retiring as Chief of Medical Staff at Brooks Air Force Base in San Antonio. He continued to serve in community medicine as Staff Physician with the University Health System in San Antonio.
Dr Marshall has served with distinction at Faith Family Family first as a volunteer and now in retirment continuing to work two days a week and vounteering at other times.
Procedures & Services
Patient Education Resources
Can video game usage lead to ADHD?
Attention-deficit/hyperactivity disorder (ADHD) is a complex disorder that is believed to be caused by a combination of genetic and environmental factors. While excessive video game use has been assoc...
Attention-deficit/hyperactivity disorder (ADHD) is a complex disorder that is believed to be caused by a combination of genetic and environmental factors. While excessive video game use has been assoc...
Could gluten be triggering my asthma?
There is some evidence to suggest that gluten, a protein found in wheat, barley, and rye, may be a trigger for asthma symptoms in some individuals. However, the relationship between gluten and asthma ...
There is some evidence to suggest that gluten, a protein found in wheat, barley, and rye, may be a trigger for asthma symptoms in some individuals. However, the relationship between gluten and asthma ...
How is atopic dermatitis different from eczema?
Atopic dermatitis and eczema are often used interchangeably, but they are not exactly the same thing. Atopic dermatitis is a type of eczema.Eczema is a general term that refers to a group of condition...
Atopic dermatitis and eczema are often used interchangeably, but they are not exactly the same thing. Atopic dermatitis is a type of eczema.Eczema is a general term that refers to a group of condition...
What are the best sunscreens?
The best sunscreens are those that provide broad-spectrum protection, which means they protect against both ultraviolet A (UVA) and ultraviolet B (UVB) rays. They should also have an SPF (sun protecti...
The best sunscreens are those that provide broad-spectrum protection, which means they protect against both ultraviolet A (UVA) and ultraviolet B (UVB) rays. They should also have an SPF (sun protecti...
What are treatment options for an enlarged prostate?
An enlarged prostate, also known as benign prostatic hyperplasia (BPH), is a common condition that affects many men as they age. Treatment options for an enlarged prostate will depend on the severity ...
An enlarged prostate, also known as benign prostatic hyperplasia (BPH), is a common condition that affects many men as they age. Treatment options for an enlarged prostate will depend on the severity ...