Blog author
Sven Gründer
Expert and author for men’s health, prostate, hormones and lifestyle
Sven Gründer is an expert in men’s health, a topic that is more than just an area of interest for him. As a former postal worker, Sven began early to engage deeply with health questions around aging, hormonal changes and the role of natural approaches for a strong life as a man. His personal experience, medical interest and pragmatic approach make him an important voice in German-language health content today.
In addition to his work for supernahrung.com, Sven previously ran the blog jetztaufsiegersetzen.de. There he devoted himself fully to men’s health, with expertise, everyday practicality and a clear goal: to support men over 40 in understanding their bodies, taking changes seriously and finding new strength.
For health reasons, Sven had to stop working on that project. At streamcheck.io, Sven contributes his competence exactly where it is needed: in editorial articles on hormonal balance, libido, prostate, nutrition and lifestyle. Especially for men in the second half of life. He combines scientific findings with personal impulses and always stays close to the questions and concerns of his readers. In his free time, Sven gathers fresh ideas on walks along the Baltic Sea with his loyal dachshund Rudi, always looking for "Hühneraugen" (small stones) and new perspectives on what men’s health really means today.
Written articles
2025-08-01
Alkaline urine: what your urine pH says about your health
A urine pH above 7 means your urine is alkaline. Learn what can cause it, how to measure your pH correctly with test strips, and when to see a doctor.
2025-08-01
Bladder pain in men: common causes and when to see a doctor
Bladder pain in men can have many causes, from bladder infections and urinary stones to prostate problems. Learn which symptoms matter and when to see a doctor.
2025-08-01
Cystoscopy: what to expect during the exam
A cystoscopy lets your doctor look directly inside the bladder and urethra. Learn why it is done, how the exam works, whether it hurts, and how to prepare.
2025-08-01
Hydronephrosis: when urine backs up into the kidney
Hydronephrosis develops when urine backs up into the kidney, often without symptoms. Learn the causes, warning signs, treatments, and why men over 50 are at risk.
2025-08-01
Protein and kidney health: how much protein is safe for your kidneys?
Does a high-protein diet harm your kidneys? What the research says about protein intake and kidney function, and when higher amounts call for caution.
2025-08-01
Uroflowmetry at home: check your bladder health discreetly
How uroflowmetry (urine flow measurement) works at home: check your bladder health discreetly, understand your flow values, and know when to see a urologist.
2025-08-01
Weak urine stream: causes, symptoms, and what to do
A weak urine stream is common in men and often treatable. Learn what causes it, which symptoms to watch for, and how to gain clarity discreetly at home.
2025-08-01
Why does coffee make you pee?
Coffee makes you pee because caffeine boosts urine production and can irritate the bladder. Learn how caffeine works and how to reduce the urge to urinate.
Reviewed articles
2026-07-04
Bladder health: the complete guide to function, problems and prevention
How your bladder works, which symptoms are common and what you can do yourself to support bladder health — a complete guide to function, problems and prevention.
2026-07-04
Kidney health: the complete guide to function, care and prevention
What your kidneys do every day, which conditions can develop, and how nutrition, checkups and early detection support kidney health. A complete guide.
2026-07-03
Your prostate: the complete guide to function, screening, and treatment
How the prostate works, common conditions, PSA levels, screening, and modern treatment options — a complete guide to staying on top of your prostate health.
2025-08-04
Erectile dysfunction: causes, symptoms, and treatment options explained
Erectile dysfunction affects millions of men. Learn about the causes, symptoms, diagnosis, and modern treatment options for ED — and what you can do yourself.
2025-08-01
Acidic urine: what a low pH means and how to bring it back into balance
Is your urine too acidic? Learn what a low urine pH means, how to measure it reliably, and how diet, hydration, and daily habits can restore your balance.
2025-08-01
Black urine: what a very dark urine color means and why it needs immediate attention
Black urine is rare but almost always a serious warning sign. Learn the possible causes, from alkaptonuria to liver disease, and when to seek emergency care.
2025-08-01
Bladder-friendly foods: 12 that can really help with bladder weakness
Discover 12 bladder-friendly foods that can help prevent bladder weakness and incontinence, which drinks to avoid, and how diet supports bladder health.
2025-08-01
Bladder infection without burning: is that really possible?
A bladder infection can occur without a burning sensation when urinating. Learn which symptoms may appear instead, why men more often have atypical symptoms, and when medical assessment is important.
2025-08-01
Bladder irrigation: how it works, benefits, and what to expect
Bladder irrigation is used to flush the bladder, treat inflammation, or deliver medication. Learn how the procedure works, whether it hurts, and when it makes sense.
2025-08-01
Bladder training for men: practical strategies for more control
Bladder training for men: proven exercises and strategies for urinary urgency and incontinence. Learn how to regain control of your bladder step by step.
2025-08-01
Brown particles in urine: what these unusual deposits mean
Noticing brown particles in your urine? Learn what these deposits can mean — from old blood to urinary tract infections — and when to see a doctor.
2025-08-01
Brown urine: what a dark urine color can mean
Brown urine is often caused by dehydration, foods, or medications, but it can also signal a medical condition. Learn what it means and when to see a doctor.
2025-08-01
Cloudy urine: what it means and what you can do about it
Cloudy urine in men can point to dehydration, a urinary tract infection, or prostate changes. Learn what causes it, when to act, and how to check at home.
2025-08-01
Crystals in urine: what these deposits mean
Crystals in urine can be harmless or an early sign of kidney stones. Learn what causes urine crystals, which symptoms to watch for, and how they are treated.
2025-08-01
Which urine colors are dangerous? When to see a doctor
Which urine colors are dangerous? Learn what red, brown, black, cloudy, or foamy urine can mean, which warning signs matter, and when to see a doctor promptly.
2025-08-01
Flakes in urine: what cloudy urine and white particles mean
Flakes or cloudiness in your urine can have many causes, from dehydration to a urinary tract infection. Learn what the particles mean and when to see a doctor.
2025-08-01
Foods to avoid with kidney disease: what to skip when your kidneys are weak
Which foods to avoid with kidney disease: how protein, potassium, phosphate, and sodium strain weak kidneys — plus practical tips for shopping and cooking.
2025-08-01
Gravel in urine: what the tiny grains in your urine mean
Noticed gravel in your urine? Learn what these fine grains mean, what causes urinary gravel, and how to lower your risk of kidney and bladder stones.
2025-08-01
Green urine: what an unexpected color can mean
Green urine is often harmless, but it can point to an infection. Learn the causes of green urine, when to see a doctor, and what urine color says about your health.
2025-08-01
Neon yellow urine: what the bright color means
Neon yellow urine usually comes from B vitamins and is harmless. Learn which rare causes exist and when the bright color is a signal worth checking with a doctor.
2025-08-01
No urine despite drinking plenty: what it means and when to act
Passing no urine despite drinking plenty of fluids can signal urinary retention or a kidney problem. Learn the causes, symptoms, and when to seek care.
2025-08-01
Orange urine: harmless causes, warning signs, and when to see a doctor
Orange urine is often caused by dehydration, foods, or medications. Learn which causes are harmless, which symptoms are warning signs, and when to see a doctor.
2025-08-01
Orgasm frequency: how often is normal and healthy?
How often is an orgasm healthy? Learn what regular orgasms do for body and mind, what shapes your personal orgasm frequency, and whether an ideal number exists.
2025-08-01
Pelvic floor exercises for men: more control, better quality of life
Effective pelvic floor exercises for men: simple daily training to reduce incontinence, strengthen a weak urine stream and improve bladder control at home.
2025-08-01
Pink urine: causes, warning signs, and when to see a doctor
Pink urine can come from foods, medications, or blood in the urine (hematuria). Learn the most common causes, the warning signs, and when to see a doctor.
2025-08-01
Purple urine: what causes this rare phenomenon?
Purple urine is almost always purple urine bag syndrome (PUBS). Learn how it develops, who is at risk, and why it always calls for prompt medical attention.
2025-08-01
Pus in urine: what cloudy urine and white blood cells mean
Pus in the urine (pyuria) usually points to a urinary tract infection. Learn what causes cloudy, milky urine, which symptoms matter, and when to see a doctor.
2025-08-01
Red blood cells in urine: what blood in the urine means
Found red blood cells in your urine and unsure what it means? Learn the possible causes, symptoms and when medical assessment is needed for blood in the urine.
2025-08-01
Red urine: what blood in your urine can mean
Red urine usually means blood (hematuria) and needs prompt medical attention. Learn the common causes, from infections to stones, and when to see a doctor.
2025-08-01
Sweet-smelling urine: what it can mean and when to act
Sweet-smelling urine can point to diabetes, a urinary tract infection, or your diet. Learn the possible causes, key warning signs, and when to see a doctor.
2025-08-01
Uncontrolled urine leakage in men: causes and what you can do
Urine leaking without warning? Learn what causes uncontrolled urine leakage in men, the types of incontinence, and how treatment can restore bladder control.
2025-08-01
Urine dribbling in men: causes, types, and what you can do
Urine dribbling in men often points to bladder weakness, an enlarged prostate, or a weak pelvic floor. Learn the causes, types, and treatments that help.
2025-08-01
Urine in your underwear as a man: what to do about unwanted urine leakage
Keep finding urine in your underwear as a man? Learn what causes urine leakage and incontinence, how urologists diagnose it, and which treatments help.
2025-08-01
Urine pH: what it reveals about your health and how to balance it
Learn what your urine pH reveals about your metabolism and kidneys, how to measure it at home with test strips, and how to bring it back into balance.
2025-08-01
Urine smells like ammonia: causes and what to do
Urine that smells like ammonia usually points to dehydration, but diet or a urinary tract infection can play a role. Learn the causes and when to see a doctor.
2025-08-01
Urine smells like fish: causes and what to do
Urine that smells like fish is often caused by diet or dehydration, but it can also point to an infection. Learn the most common causes and when to see a doctor.
2025-08-01
Urine smells like sulfur: causes and when to see a doctor
Urine that smells like sulfur is often caused by foods like asparagus, but it can also signal a UTI. Learn the causes, warning signs, and when to see a doctor.
2025-08-01
Urine smells like yeast: what your body is telling you
Urine that smells like yeast can point to diet, a urinary tract infection, or blood sugar issues. Learn what causes the odor and when to see a doctor.
2025-08-01
White urine: what cloudy or milky urine can mean
White, cloudy, or milky urine can have harmless causes like diet or dehydration, but it can also signal a urinary tract infection. Learn when to see a doctor.