pH and alkaline water

5 04 2012

Learn the pros and cons of using pH and alkaline water.

Drinking pH water helps your body with endurance but only on an empty stomach, drinking it with a shake or with food is harmful to your digestive system.


XCAP’s Dr. Fitzgerald – All Diets Work

29 02 2012

Here is an important point that Dr. Fitzgerald makes about diets.

All diets have one thing in common that make them work: Calorie Restriction


We hope these videos help you.

Make sure you go onto YOU TUBE and subscribe to his channel: BloodDocJohn

Also, Dr. Fitzgerald’s book on Fat Loss can be purchased at

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Food Sensitivities – Detailed Verson

24 02 2012

We knew that having Dr. Fitzgerald talk about different health topics would be useful to many people but we had no idea it would be this popular.  He had so many questions and thank you’s from the food sensitivity video that he made another video about food sensitivities that goes into more detail.

We hope these videos help you.

Make sure you go onto YOU TUBE and subscribe to his channel: BloodDocJohn

Also, Dr. Fitzgerald’s book on Fat Loss can be purchased at

XCAP Launches in The UK

10 03 2011

XCAP is now conveniently located in The United Kingdom.  Expect that your supplements will be shipped to you with ease and efficiency.  Check out and also Xtreme Couture UK on Facebook.

New Weight Loss Book Needs a Title

8 02 2011

Dr. John Fitzgerald’s weight loss book is currently going through the final touches.

We would like to hear your suggestions for a title.

Please put your suggestions in the comment section below.

If you title is chosen, you will receive an autographed copy on the first run of the book.


Customers Get Amazing Results with the XCAP Zyto Scan

25 01 2011

Dr. John Fitzgerald met with customers at Las Vegas Nutrition Center to do free consultations with the Zyto Scan.  The Zyto Scan allows the body to communicate through Galvanic Skin Response (GSR) technology to measure fluctuations in electrical conductivity of the skin.  By placing their hands on the hand cradle device, Dr. Fitzgerald was able to analyze the data that was transmitted through the sensors and assist the customers in choosing the XCAP products best suited for their needs.  

XCAP can now be found at any of the Las Vegas Nutrition Center Stores.   

(Top picture and descending): Store Owner Lori Smith with customer, Jane Nass and Dr. John Fitzgerald, Aaron Tru and Dr. John Fitzgerald, Gilles Reichert and Dr. John Fitzgerald, Ikelene and Aaron Tru, XCAP

Vitamin D improves Testosterone

25 01 2011

I have been saying for several years that when I give patients Vitamin D, it improves their hormone levels.  Now, here is some research to back it up.  Dr. John Fitzgerald, Blood Doc John

Effect of Vitamin D Supplementation on Testosterone Levels in Men.

Department of Internal Medicine, Division of Endocrinology and Metabolism, Medical University of Graz, Austria.


The male reproductive tract has been identified as a target tissue for vitamin D, and previous data suggest an association of 25-hydroxyvitamin D [25(OH)D] with testosterone levels in men.

We therefore aimed to evaluate whether vitamin D supplementation influences testosterone levels in men.

Healthy overweight men undergoing a weight reduction program who participated in a randomized controlled trial were analyzed for testosterone levels. The entire study included 200 nondiabetic subjects, of whom 165 participants (54 men) completed the trial.

Participants received either 3 332 IU vitamin D daily for 1 year or placebo. Initial 25(OH)D concentrations were in the deficiency range (<50 nmol/l) and testosterone values were at the lower end of the reference range (9.09-55.28 nmol/l for males aged 20-49 years) in both groups. Mean circulating 25(OH)D concentrations increased significantly by 53.5 nmol/l in the vitamin D group, but remained almost constant in the placebo group.

Compared to baseline values, a significant increase in total testosterone levels (from 10.7±3.9 nmol/l to 13.4±4.7 nmol/l; p<0.001), bioactive testosterone (from 5.21±1.87 nmol/l to 6.25±2.01 nmol/l; p=0.001), and free testosterone levels (from 0.222±0.080 nmol/l to 0.267±0.087 nmol/l; p=0.001) were observed in the vitamin D supplemented group.

By contrast, there was no significant change in any testosterone measure in the placebo group. Our results suggest that vitamin D supplementation might increase testosterone levels.