Diet Lifestyle & Risk Factors
Diet Lifestyle & Risk Factors Diet factors associated with calcium oxalate crystal formation
Drinking too little water is a major factor contributing to calcium oxalate crystals. Drinking extra water dilutes the substances in urine that lead to calcium oxalate crystals. Strive to drink enough fluids to pass 1 ½ to 2 liters of urine a day, which is roughly six to eight standard 8-ounce cups.
At the first sign of a kidney stone, it may help to include some citrus beverages, like lemonade and orange juice. The citrate in these beverages helps block calcium oxalate crystal formation.
Even though calcium oxalate crystals are the most common type of crystals, it does not mean to eliminate calcium from your diet, you still need foods that have calcium! Getting too little calcium in your diet can cause oxalate levels to rise and actually lead to calcium oxalate crystals. To prevent this, make sure to get enough calcium appropriate to your age by consuming foods high in calcium and Vitamin D (or take a calcium supplement if necessary).
Ideally, obtain calcium from eating foods, since some studies have linked taking calcium supplements to calcium oxalate crystals. Men 50 and older should get 1,000 milligrams (mg) of calcium per day, along with 800 to 1,000 international units (IU) of vitamin D to help the body absorb the calcium. Woman 50 and older should get 1,200 milligrams (mg) of calcium per day, along with 800 to 1,000 international units (IU) of vitamin D to help the body absorb the calcium. Eating foods that have calcium, rather than using calcium food supplements, is strongly suggested.
Meat and Animal Protein Intake
Eating too much animal protein, such as red meat, poultry, eggs and seafood, boosts the level of uric acid and could lead to uric acid crystals. A high-protein diet also reduces levels of citrate, the chemical in urine that helps prevent several types of crystals from forming.
If you are prone to crystals, limit your daily meat intake to a quantity that is no bigger than a pack of playing cards. This is also a heart-healthy portion.
Calcium Oxalate Rich Food Intake
Avoid calcium oxalate crystal-forming rich foods such as beets, chocolate, spinach, rhubarb, tea and most nuts. At the first sign of a kidney stone, you should also avoid cola sodas as they are rich in phosphate. Both oxalate and phosphates can contribute to calcium oxalate crystal formation. If you suffer from calcium oxalate crystals, your doctor may advise you to avoid these foods or to consume them in smaller amounts or try the calcium stones diet.
Fructose (Sugar) Intake
Risk factors associated with calcium oxalate crystal formation
Approximately 80 percent of all calcium oxalate crystals are composed predominantly of calcium compounds. The most common cause of calcium crystal production is excess calcium in the urine (hypercalciuria). Extra calcium is normally removed from the blood by the kidneys and excreted in the urine. In hypercalciuria, excess calcium builds up in the kidneys and urine, where it combines with other waste products to form calcium oxalate crystals.
Low levels of urinary citrate, magnesium and high levels of oxalate and sodium along with as inadequate urinary volume contribute to calcium crystal formation.
Calcium oxalate crystals are composed of calcium that is chemically bound to oxalate (calcium oxalate) or phosphate (calcium phosphate). Of these, calcium oxalate is much more common. The less common calcium phosphate crystals typically occur in patients with metabolic or hormonal disorders such as hyperparathyroidism and renal tubular acidosis
Increased intestinal absorption of calcium (absorptive hypercalciuria), excessive hormone levels (hyperparathyroidism, hypervitaminosis D), and renal calcium leak (kidney defect that causes excessive calcium to enter the urine) can all cause hypercalciuria.
Prolonged inactivity also increases urinary calcium and may cause calcium oxalate crystals. (This is why astronauts in space tend to lose bone mass and form calcium oxalate crystals.)
Renal tubular acidosis
Renal tubular acidosis (inherited condition in which the kidneys are unable to excrete acid) significantly reduces urinary citrate (a natural urinary antacid) as well as total urinary acid levels and can lead to crystal formation, usually calcium phosphate.
Substances exist normally in urine that can prevent calcium oxalate crystals from developing. Magnesium, citrate, pyrophosphate and other enzymes all act in the body as a deterrent to crystals forming and attaching to the surface of kidney tubes. Having too little of these substances present in urine can trigger calcium oxalate crystals.
Medications and Drugs
Certain medications such as calcium-containing antacids, loop diuretics and glucocorticoids can increase calcium secretion into the urine. Too much vitamin D can also lead to increased calcium.
High Blood Pressure and Obesity
High blood pressure and obesity have also been associated with hypercalciuria.
Lifestyle factors associated with calcium oxalate crystal formation
According to recent studies, being obese or gaining weight may increase the risk of developing calcium oxalate crystals. Researchers found women who weighed more than 220 pounds were 90% more likely to develop calcium oxalate crystals than those who weighed less than 150 pounds.
Men and women who gained more than 35 pounds since they were 21 years old also had a 39% to 82% higher risk of calcium oxalate crystals. Prolonged inactivity increases urinary calcium. (This is why astronauts in space tend to lose bone mass and form calcium oxalate crystals.)
Stomach Bypass Surgery
Sometimes, the underlying cause is a metabolic disorder or kidney disease and certain drugs such as Lasix (furosemide), Topomax (topiramate), and Xenical (orlistat), can also promote calcium oxalate crystals.
Many times, it is a combination of factors that creates an environment favorable to crystal formation but often diet intake is one of the leading causes of crystals forming.
Other factors associated with calcium oxalate crystal formation
Common diseases and conditions that can cause crystals
It is important to know that calcium oxalate crystals are more common if you have Inflammatory Bowel Disease (IBD), Ulcerative Colitis or Crohn’s Disease. These conditions affect your body’s ability to absorb fats properly. When fat is not absorbed the right way, the fat binds to calcium and leaves oxalate behind. The oxalate is then absorbed and taken to the kidney, where it can form calcium oxalate crystals.
Similarly, following gastric bypass surgery, your body absorbs less calcium from your digestive system. Because of this, higher levels of oxalate are found in the urinary tract. The build-up of oxalate can form crystals, which can form calcium oxalate crystals.
Urinary infections can lead to developing struvite crystals. Struvite crystals can happen when you have certain types of urinary tract infections in which bacteria make ammonia that builds up in your urine. Struvite crystals are made of magnesium, ammonium and phosphate. These crystals can grow quickly and become quite large, sometimes with few symptoms or little warning.
Other diseases and conditions that can cause crystals
Other diseases such as Dent (a rare genetic disorder that affects the kidneys) and Hyperparathyroidism (a very high amount of a type of hormone called parathyroid hormone in the blood that causes a loss of calcium… calcium is needed to bind with oxalate and leave the body) can cause calcium oxalate crystals.
Family history and genetics might also be a factor for some people in getting calcium oxalate crystals.