12 Steps to Prevent Kidney Stones:
The pain of kidney stones is one of the worst possible pains one could possibly experience. While the causes behind kidney stones are not fully understood there is some common nutritional advice that can help prevent these stones from forming.
Kidney stones come in a number of different forms. Understanding the type of stone is key to preventing it from re-forming. The most common kidney stones are by far calcium oxalate crystals which account for 80% and uric acid crystals which account for another 5-10% (1).
The goal of this article is to help you find the best strategies to work with your unique genetic makeup to prevent kidney stones. We will discover the underlying mechanisms behind kidney stone formation and the unique nutrition and lifestyle tips to follow.
Fructose and Kidney Stone Formation:
Certain foods that are commonly consumed in the United States promote kidney stone formation. High fructose consumption is linked with an increased excretion of calcium, oxalates and uric acid, which are all associated with increased risk of kidney stones. Research has shown that high fructose diets are at greater risk for kidney stone formation (2, 3, 4)
Soft drinks with phosphoric acid significantly increase calcium excretion and kidney stone formation (5). Soft drinks and sweet teas are perhaps the biggest dietary causes of kidney stone formation because they often contain high levels of both fructose and phosphoric acid (6)
Major Factors With Kidney Stones:
Here are 6 major factors often seen with kidney stone formation
Dehydration: This causes low urine volume and less fluid to grab up calcium and other compounds in the urinary system. This is the easiest thing to address. You should be urinating every 1-2 waking hours and unless you take a B vitamin supplement your urine should be relatively clear.
High Urinary Calcium: This can be do to a very high calcium intake, typically from supplements or from vitamin D toxicity where levels are over 150 ng/ml. This would be due to very large supplementation as well. Getting vitamin D levels tested and urinary calcium and phosphorus levels will determine the major cause.
Hyperoxaluria: High oxalates in the urine increases the risk of calcium oxalate kidney stones. This can be due to a genetic metabolic issue or due to decreased levels of oxalate metabolizing bacteria in the gut and/or a yeast overgrowth (7, 8). Vitamin B6 deficiencies also increase levels of oxalates in the urine (9, 10).
Hypocitraturia: This refers to low levels of citric acid in the urine. It is found in at least 20% of kidney stone formation (11). It is typically caused by distal renal tubular acidosis, hypokalemia, bowel dysfunction, and a high-protein, low-alkali diet. Genetic factors and medications may also play a role.
Most commonly it is found in individuals with small intestinal bacterial overgrowth and a highly acidic diet that is low in alkaline buffering minerals (12).
High Sodium Intake: A high sodium intake can create mineral imbalances in the body. If you are on a moderate-high carbohydrate diet your body will naturally retain sodium and can cause more problems with mineral balance. Low-carbohydrate, high fat (ketogenic) diets excrete sodium and therefore need more good salts (13).
Stay away from processed salts and processed sodium rich foods and consume natural foods, stick to a low-moderate carbohydrate, high good fat diet and consume unprocessed sea salts and pink salts.
High Uric Acid Levels: Elevated uric acid is also associated with gout and cardiovascular disease. High uric acid is most commonly seen with high fructose consumption.
When cells become damaged and are replaced their DNA/RNA degrade into purine molecules which are then metabolized into uric acid. High fructose consumption causes cells to burn up their energy stores and go into a state of shock that leads to massive cellular death (14). This cellular die-off leads to excessive increases in uric acid.
A study published in the Journal of the American Medical Association demonstrated that individuals who drink one fructose-rich beverage a day are 74% more likely of developing gout than those who drink the same beverage once per month. Individuals who drank two or more fructose sweetened beverages are 97 percent more likely to develop the disease (15).
Identifying the Cause of Your Stone:
If you or a family member have had a kidney stone it is important to find out what kind of stone it was and work with a health care practitioner to find out which of the above mechanisms were in action to create the stone.
If you are unable to find out what form of stone it is than consider the most common forms. Roughly 80% of all stones are calcium oxalate while 5-10% are uric acid. If you or a parent or sibling has gout you may consider uric acid as an issue.
If you are taking very high doses of vitamin D or are often dehydrated than address those issues. Additionally, adding in more lemon and lime is a great way to add more potassium citrate to your diet and keep your body more alkaline which will reduce any chance of hypocitraturia.
The Problem with Elevated Oxalates:
Oxalates are naturally occurring compounds in plants, animals and humans. The body is naturally able to synthesize oxalates from various compounds such as excess vitamin C, fructose as well as yeast. Vitamin B-6 deficiency, magnesium and thiamine deficiency are also ideal circumstances for increased oxalate synthesis. (16, 17)
If one has a genetic issue that creates high urinary oxalates that needs to be addressed. Additionally, one may have nutrient deficiencies or yeast overgrowth and a lack of oxalate metabolizing probiotic organisms in their gut (18, 19). All of these conditions can lead to dangerous elevations in oxalates that predispose one to developing kidney stones.
These are considered the most common causes for kidney stones and therefore I recommend functional testing to see if you are at risk.
Testing For Oxalate Metabolism:
Clinically, I use the Great Plains laboratory organic acid test to determine if someone has elevated oxalates in their system. This is a simple urine test done in the comfort of your own home.
When I see elevated oxalic acid with elevated glyceric or glycolic acid it is usually a sign of a genetic hyperoxaluria. When oxalic acid is elevated without an elevation in glyceric or glycolic acid it is typically related to Candida Albicans overgrowth or a very high vitamin C intake.
This test also lets me analyze for vitamin B6 deficiencies and for Candida overgrowth which are both major causes of hyperoxaluria (20, 21, 22). From a functional nutrition and natural medicine perspective this test helps me to determine the cause and best diet and treatment for this condition.
Detox Diet for Healthy Kidneys:
An anti-inflammatory lifestyle is important for reducing kidney stone formation. This begins with drinking at least half your body weight in ounces of clean, pure water. Next, we need to eat a diet rich in phytonutrient dense vegetables, healthy fat and clean protein sources.
Healthy fat sources include coconut products, avocados, olive oil, & purified omega-3 fish oil supplements. Healthy protein includes wild-caught fish, grass-fed red meat and free range chicken, turkey, and eggs. Anti-inflammatory herbs such as raw ginger (not ground), cilantro, sage and basil are also powerful aids.
Other helpful foods for the kidneys include cranberry’s, dandelion root, kidney beans, horsetail, pomegranate juice, celery and watermelon. However, be careful as the watermelon and pomegranate juice are both relatively high in fructose so have them in moderation. The raw celery is moderately high in oxalates so be careful not to consume more than 2 bunches per week.
The Importance of Citric Acid:
The major antagonist to calcium based stones is citrate. Citrate is present in citrus fruits. Drinking fresh squeezed lemons in water (see recipe below) can be a very effective remedy for kidney stones.
Citrate supplementation is also very effective when it is combined with potassium and magnesium which is the form it comes in with fresh squeezed lemons and limes. This combination will make the urine less acidic and therefore help decrease the potential to form stones.
A 2007 study showed that the addition of alkali forming elements in potassium-magnesium citrate is an effective tool to reduce kidney stone formation. Despite an increase in urine calcium concentration, the relative saturation of calcium oxalate decreased due to citrate chelation of calcium and the concentration of undissociated uric acid decreased due to the significant increase in urine pH (23).
I recommend having one of these potassium citrate caps with each meal, especially higher oxalate meals to bind and eliminate oxalates.
Low Oxalate and Low Fructose Diets:
A low-oxalate diet is important for anyone who has had calcium oxalate kidney stones or has a genetic susceptibility for them. Foods rich in oxalates include beer, chocolate, nuts, spinach, chard, strawberries, certain teas, beets, & wheat germ. Reducing fructose content is also especially important for the reasons described earlier in the article.
Vitamin C metabolism produces oxalate and some studies have linked vitamin C to increased risk for kidney stone formation (24). More conclusive studies have shown that vitamin C supplementation is recommended as long as it is accompanied by high levels of vitamin B6 (such as lemon) which naturally binds oxalate (25).
Lemon Juice and Olive Oil Protocol:
I have my clients take 2 oz of extra virgin olive oil with 2 oz of organic lemon juice at the onset of kidney stone symptoms. Drink this mix straight and then drink 12oz of purified water right after. Then wait 30 minutes and mix the juice of 1/2 lemon and 1 tbsp of raw apple cider vinegar in 12 oz of purified water and drink this throughout the day.
This will help to dissolve some of the stones and make them easier to pass. Be sure to reduce fructose and oxalate levels during this period of time.
Healthy levels of calcium bind to oxalate in the bowels before the oxalate is filtered through the kidneys. As the amount of calcium intake decreases, the amount of oxalate available for absorption into the bloodstream increases; this oxalate is then excreted in greater amounts into the urine by the kidneys.
In the urine, oxalate is 15 times stronger than calcium in attracting the formation of calcium oxalate stones. Take in appropriate amounts of calcium by consuming grass-fed dairy products and low-oxalate vegetables such as cabbage and cauliflower.
Vitamin D3 and vitamin K2 work together in synergy to modulate calcium metabolism into the bones. Optimizing your vitamin D levels by getting them between 60-100 ng/ml is extremely important. Additionally, consuming vitamin K2 through fermented foods and supplements is also a powerful tool for enhanced calcium metabolism.
High Uric Acid Levels:
Uric acid stones are most often formed through diets high in protein and possibly fructose. Uric acid is a byproduct of protein, alcohol, and fructose metabolism. Some individuals have trouble eliminating this acid which can form gouty crystals as well as particles in the kidneys.
These individuals should avoid alcohol, and purine rich foods such as red meats, organ meats, & legumes. Additionally, they should avoid high fructose corn syrup, honey, agave nectar, and lots of fruit due to the fructose content.
These individuals do very well on foods that are high in oxalates such as spinach, beets, collards, kale, celery, etc. They should be focusing on these foods with high anti-oxidant content to neutralize uric acid levels.
If you have a history of kidney stones and especially uric acid based stones it is adviseable to keep your total fructose intake to under 20 grams per day and ideally 10-15 grams.
Unique Herbs to Support the Kidneys:
Some major herbs such as goldenrod, bearberry and stinging nettle. Goldenrod has been used in Europe for centuries to treat urinary tract inflammation and prevent and treat kidney stones. Goldenrod is a key ingredient in many traditional teas used to help flush out kidney stones and stop inflammatory diseases of the urinary tract (26).
Bearberry can help to reduce accumulations of uric acid and relieve the pain of bladder stones by strengthening and imparting tone to the urinary passages. Bearberry contains allatoin which helps soothe, strengthen and tighten irritated and inflamed tissues(27).
Nettle is also rich in plant sterols, lignans and flavonoid anti-oxidants that support the bladder and kidney cell walls (28). These nutrients reduce inflammatory prostaglandins and increase urinary volume to wash out bacteria and toxins from the urinary tract (29). This also helps to prevent and treat kidney stones.
12 Steps to Prevent Kidney Stones:
Here are the best action steps to get started with on your journey to beat kidney stones naturally. You should always consult with your physician before stopping or changing medications or taking on new health strategies.
Additionally, you should be working with a functional health practitioner to help guide you through these strategies. This is not an exhaustive list and there are other natural therapeutic strategies that I and functional health practitioners will utilize to help individuals with kidney stones.
1. Drink Lots of Filtered Water: Drink at least half of your body weight in ounces of pure, filtered water. For information on proper water filtration read this article here
2. Test for Oxalate Elevations: If you have had a calcium oxalate kidney stone or have a family history of these sort of stones it would be a great idea to get tested to see how you are metabolizing oxalate.
3. Limit Fructose Consumption: It is important to reduce consumption to fructose. This includes all processed corn syrups and high fructose corn syrups and agave nectar. You should also look to limit intake of honey and high fructose fruit.
4. Avoid High Dose Vitamin C Supplementation: The research appears to show that high dosages of vitamin C without high doses of B6 can increase oxalate content and elevate the risk of kidney stone formation. Keep vitamin C supplementation down to 1-2 grams daily or use 10mg of B6 per gram of vitamin C if you choose to supplement higher.
5. Drink Lemon or Lime in Water: Adding lemon or lime to your water increases citrate content and adds vitamin C and B6 which reduce kidney stone formation. Consider doing my anti-inflammatory lemonade recipe.
6. Consider a Low-Oxalate Diet: Since 80% of kidney stones involve calcium oxalate, if you have a history of this sort of stone you should consider a low-oxalate diet.
7. Consume Magnesium & B Vitamin Rich Foods: Magnesium and B vitamins help improve the alkali content of the body and reduce free oxalate and uric acid production. If you are on a low-oxalate diet be sure to consume lots of bok choy, broccoli, cabbage, cauliflower, grass-fed butter and cheese and flax seeds which are low oxalate and high in magnesium and B vitamins.
8. Consume Non-Processed Sodium: Get rid of all forms of processed sodium and consume non-processed sea salt and pink salts like Himalayan sea salt.
9. Use Kidney Supportive Herbs: Herbs known to support the kidneys and reduce the risk of kidney stone formation include stinging nettle, goldenrod and bearberry (uva ursi) leaf. I recommend drinking nettle tea and uva ursi tea on a daily basis.
10. Improve Your Gut Motility: Improving bowel movement frequency and consistency is a key detoxification concept. Consuming an anti-inflammatory diet with good fiber sources such as chia seed and flax seed, using bone broths, fermented foods and probiotics will improve bowel motility. Restore harmony to your gut through diet and proper supplementation.
12. Optimize Vitamin D: Boost your vitamin D3 levels by getting more whole body sun exposure and/or using a high quality supplement. I recommend a D3 with vitamin K2. Aim to get 5,000-10,000 IU daily.
If very deficient (less than 30 ng/ml) try taking 20,000 IU for 30 days along with daily sun exposure and then drop your supplementation to 10,000 IU daily.