Urologists often refer to the southern United States as the "Stone Belt." In Sugar Land and Fort Bend County, the combination of high heat and relentless humidity creates a perfect storm for chronic dehydration. When you do not drink enough water to compensate for the sweat you lose just walking to your car, your urine becomes highly concentrated. This lack of fluid allows minerals like calcium and oxalate to crystallize, bind together, and form hard deposits known as stones.
If you have ever passed a kidney stone, you know it is an excruciating experience that you never want to repeat. The pain is frequently described by patients as worse than childbirth. The good news is that for the vast majority of patients, recurrent stones are largely preventable with specific, targeted lifestyle adjustments. Men, in particular, face a higher lifetime risk and should prioritize this preventive care just as they would schedule their colon cancer screenings.
Hydration: The 2.5 Liter Rule
The most common advice given to patients is simply to "drink more water," but that is entirely too vague. My clinical recommendation is to drink enough water to produce at least 2.5 liters of clear urine per day.
You lose a massive amount of water through your skin and breath in the Texas summer, a process known clinically as insensible fluid loss. If your urine is dark yellow, you are already behind. To achieve the 2.5 liter output goal, a patient working outdoors or exercising in our climate might need to consume upwards of a gallon of water daily.
The Power of Citrate
Water volume is critical, but the specific chemistry of your urine also matters. Citrate is a naturally occurring compound that binds to calcium in the urine. By keeping the calcium occupied, citrate prevents the calcium from binding with oxalate to form a solid stone. It essentially acts as a chemical shield against stone formation.
You can easily increase your citrate levels naturally by adding fresh lemon or lime juice to your daily water intake. For patients with a strong history of recurrent stones, we sometimes prescribe concentrated potassium citrate, but utilizing citrus fruits is an excellent, simple first step for general prevention.
The Calcium Myth
One of the most persistent and harmful misconceptions I encounter in the clinic is patients cutting out milk, cheese, or yogurt because they were told their stones are made of "calcium."
This is actually counterproductive. Dietary calcium is your friend. When you eat calcium rich foods, the calcium binds with oxalate in your stomach and intestines. Because they bind together in the digestive tract, they leave the body safely through your digestive system before they ever reach your kidneys.
If you unnecessarily eliminate dietary calcium, the unbound oxalate is absorbed directly into your bloodstream, travels to your kidneys, and forms stones. You should absolutely continue eating normal amounts of calcium rich foods. However, you should always consult with your physician before taking over the counter calcium supplements, as these can sometimes increase your risk if taken incorrectly or without food.
Sources & Further Reading
- NIDDK (NIH): Kidney Stones Overview
- National Kidney Foundation: Kidney Stones
- American Urological Association: Medical Management of Kidney Stones
Medically Reviewed: April 24, 2026