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Ernährungsberatung Schorndorf
The main job of the kidneys is to filter & purify the blood to detoxify the body. Kidney stones (= nephrolithiasis) are hard stones that can form from crystalline substances in the urine in the kidneys, in the renal pelvis and in the urinary tract. Many small crystals leave the body without even being noticed. Crystals that are left behind can act as nuclei and turn into kidney stones. Certain eating habits can also favor kidney stones. Only when the stones migrate into the ureter do they cause pain: severe cramps in the lateral abdominal region, accompanied by nausea and vomiting (= renal colic). Men are affected more frequently than women. The cause is an oversaturation of the urine with stone-forming substances.

Causes of urine oversaturation with stone-forming substances

  • Increased excretion of stone-forming substances (such as calcium, phosphate, oxalate, uric acid) & at the same time one

  • reduced excretion of non-stone-forming substances (magnesium, citrate)

  • Increased urine concentration due to lack of fluids and dehydration (profuse sweating, dehydration, too little fluid for food and drinking water), tropical climate or chronic intestinal diseases

  • Calcium metabolism - disorders eg  due to an overactive parathyroid gland with increased calcium excretion

  • Uric acid metabolism -  Disorders with increased uric acid excretion (caused by enzyme defects or a diet containing purine (see more on gout, increased uric acid levels ), alcohol abuse or the breakdown of tumor tissue

  • Urine with a pH of less than 5.5 (for uric acid stones) or greater than 7.0 (for phosphate stones)

Risk factors that promote kidney stone formation:

  • Obesity

  • Diet: Specific drinking and eating habits

  • Insufficient fluid intake (consider total fluid: drinking fluid & fluid via food & meals)

  • Foods that dehydrate the body and oversaturate the urine with salts (e.g. asparagus, rhubarb)

  • Urinary stasis due to scars, constrictions or malformations in the kidneys or urinary tract

  • possibly food supplements that contain calcium & vitamin D (note dosage!)

  • Certain medications such as acetalzolamide, sulphonamides, triamterene, indinavir, and very high doses of acetylsalicylic acid (ASA) (> 4 g / day)

  • Family disposition (genetics) - occurrence of kidney stones in family members

  • Repeated urinary tract infections

Why is nutritional therapy important?

Nutritional therapy helps you to optimally support your kidneys in their function & to prevent kidney stones as well as to simply dissolve and thus remove existing kidney stones (small stones through plenty of fluid intake). Furthermore, it is of the utmost importance to optimally supply your body with all of the fatty acids, micronutrients (vitamins and minerals), energy and protein that are important for you. Overall, the therapy aims to avoid foods that promote inflammation and at the same time consume plenty of anti-inflammatory foods. Weight reduction may be advisable if you are overweight / obese. Special attention is also paid to the supply of fluids; a drinking and eating log can provide information about a lack of fluid intake. Nutritional therapy should also prevent new kidney stones (relapse prevention). Larger or jammed stones must be crushed or removed.

Patients with kidney disease should discuss with their doctor whether they need to control their fluid intake.

Types of kidney stones - composition

First of all, kidney gravel (fine stones) forms, these then become larger and larger stones.

  • Calcium-containing stones: (approx. 70% of all kidney stones) z. B. calcium oxalate stones or calcium phosphate stones

  • Uric acid stones: (about 15% of all kidney stones) = urate stones

  • Magnesium - ammonium phosphate stones: (approx. 10% of all kidney stones) = struvite or infection stones.

  • Cystine & xanthine stones: (approx. 2% of all kidney stones)

Functions of the kidneys:

  • Detoxification: urinary substances (creatinine, urea, uric acid), foreign substances, medication, environmental toxins

  • Keeping the water balance and osmotic pressure constant through electrolyte regulation

  • Hormone production: renin & erythropoietin, vitamin D activation in calcitriol

  • Maintenance of the acid-base balance: blood pH value: 7.4, supports the bicarbonate buffer (HCO3- + H + <-> H2CO3 <-> CO2 + H2O), H + excretion - regulation


  • Renin controls the filtration pressure

  • Filtration / d = 180 liters = 1.5 liters of urine / day

Kidney threshold of glucose: 180mg / dl / day

= max.absorption amount! -> more glucose is excreted as remainder (in diabetes mellitus)

Nephron (renal cortex) = functional unit

Nephrons consist of kidney corpuscles & tubules

1) Kidney corpuscles - primary urine formation 

  • Glomerulus-vessel unit (arteries) -> ultrafiltration

  • Baumann capsule (close-meshed filter, proteins get stuck)

2) renal tubules (tubular apparatus)

  • - reabsorption, secretion, concentration

  • Secondary urine formation (terminal urine)

  • proximal tubule (reabsorption: AS, glucose, water, electrolytes)

  • Henle loop (water)

  • distal tubule (water, electrolytes)

  • Connecting tubules (electrolytes)


Collection pipe (water reabsorption point) collects the secondary urine & guides it into the renal pelvis

Classification of your weight - definition and classification of weight in relation to height.

Special percentile curves apply to children and adolescents; the BMI cannot simply be used here.

BMI and interpretation: BMI: body mass index. Formula: Body weight in kg : (body height in m) 2

Underweight: <18.5

Normal weight: 18.5 - 24.9

Overweight = pre-obesity: 25-29.9

Obesity grade I: 30 - 34.9

Obesity grade II: 35-39.9

Obesity grade III:> 40 = per magna

Nutritional therapy

  • Anti-inflammatory nutrition as a basis, individually tailored to you

  • Individual energy & protein requirement calculation

  • Holistic therapy - do you have any comorbidities that need to be taken into account during the consultation?

  • Overall fat selection, how should it be designed

  • How many animal foods (e.g. meat products, milk and dairy products, cheese, fish products, eggs) are recommended?

  • What do I have to look out for when choosing animal foods?

  • How can I counteract inflammatory processes through diet?

  • Body weight: If you are overweight / obese, weight reduction may be recommended.

  • Avoid micronutrient deficiencies and mineral deficiencies & possibly counteract them with nutrient preparations

  • Prevent protein deficiency / excess protein

  • Which nutrients do I need in which ratio?

  • Get enough fiber (> 30 g / day) through natural foods, possibly fiber substitution

  • Sufficient fluid: total fluid per day: 30 - 35 ml per kg body weight and day. Attention, this is not just a drinking liquid. The liquid from food (approx. 500 - 800 ml) must still be subtracted from this, so that an amount of approx. 1.3 - 2 l of drinking liquid is created. In consultation with your doctor, a fluid limit may be necessary, this will then be taken into account.

  • add valuable anti-carcinogenic (anti-cancer) secondary plant substances

  • A selection of foods tailored to your needs with cooking and technical information (for breakfast, snacks, lunch, dinner)

  • Do you like to eat your warm meal in the evening? I am happy to cater to your individual situation and we will create a plan on how you can implement your wholesome diet into your everyday life.

  • which oils are good for me? What should I watch out for in relation to the anti-inflammatory diet?

  • How much fat spread (butter / margarine / vegetable fat) can I use and which products are recommended?

  • Get enough Omgea-3 fatty acids and essential fatty acids

  • How can I boost and support my metabolism with natural foods?

  • Coordinate sensible meal frequency for your individual case - meal allocation

  • Define the desired weight stabilization / normalization & the estimated period for this

  • what should be considered with beverages and alcoholic beverages?

  • How does exercise affect your body and thus also your diet?

  • Avoid blood sugar fluctuations

  • Sweetening foods - sweeteners, glucose, fructose, sugar and sugar substitutes, what can I use and in what quantities? How high is the respective sweetness of the different products?

  • what should be considered when baking and cooking?

  • what are cheap snacks / main meals

  • Eating out - what should you watch out for?

  • Vacation, boat trip or hospital stay, what should be considered?

  • Flatulence, bloating, diarrhea, constipation, vomiting, heartburn, loss of appetite, pain related to eating, what can I do about it?

  • Daily plans as an example for practical implementation in everyday life

  • Enjoyment training

  • Optimizing your eating situation

  • long-term maintenance of a jointly defined weight

  • Strengthen the stomach and intestines with natural foods

  • Additional therapy options

  • Dietetic products in support of nutritional therapy

  • Food supplements - under certain circumstances, a supplement can be useful

  • and other topics


Any questions? I look forward to your call or email. To contact form


Medizinische Ernährungsberatung die wirt!

Be free

with healthy food

for more well-being

"Your food should be your remedies , & your remedies should be your food."

Hippocrates (460-370 BC)

Binge eating disorder

Binge eating & "binge eating"


"Food keeps body and soul together"

When the soul is hungry

Certified individual therapeutic counseling

with a doctor's prescription (§ 43 SGBV)



Ernährungsberatung in Schorndorf Sarah Mörstedt
Ernährungsberatung Sarah Mörstedt
Praxis für Ganzheitliche ErSarah Mörstedtährungsbertung & Ernährungstherapie Sarah Mörstedt Diätassistentin Gesundheitspädagogin (B.A.) Diätetik Schorndorf
VDD Sarah Mörstedt Diätassistentin VDD Logo
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