Urine therapy is the practice of drinking, injecting, or applying one’s own urine to the skin for supposed health benefits. It has roots in several ancient traditions but is not supported by modern medical evidence. Drinking urine reintroduces waste products your kidneys already filtered out, and documented cases link the practice to serious complications including dangerously high sodium levels and acute kidney injury.
What Urine Actually Contains
Human urine is about 95% water. The remaining 5% is made up of substances your body deliberately expelled: urea (about 2%), creatinine (0.1%), uric acid (0.03%), and varying amounts of sodium, potassium, chloride, phosphate, sulfate, and ammonium. Hormones, drug metabolites, and other trace compounds also show up depending on what you’ve eaten, what medications you take, and how hydrated you are.
Your kidneys exist specifically to maintain a precise balance of water, salts, and minerals in your blood. As blood passes through the kidneys, they reabsorb almost all the water and nutrients your body still needs while directing excess acid, waste products, and surplus minerals into urine. What ends up in your bladder is, by definition, what your body determined it no longer wants. Re-ingesting it forces the kidneys to filter the same waste a second time.
The “Sterile Urine” Myth
A common claim among urine therapy proponents is that urine is sterile and therefore safe to consume. This is outdated. Research using DNA sequencing methods has detected bacteria in the urine of nearly all individuals tested, including healthy people with no urinary tract symptoms. The species found include lactobacilli, anaerobic bacteria, streptococci, and others that standard lab cultures simply miss because they don’t grow well under typical testing conditions. The old belief that urine in the bladder is sterile has been replaced by the concept of a urinary microbiome, a resident community of microorganisms present even in healthy people.
This doesn’t mean urine is teeming with dangerous pathogens in most cases, but it does undercut the foundational safety argument that many practitioners rely on.
Historical and Cultural Roots
Urine therapy is not a modern invention. Classical Ayurvedic texts reference the medicinal use of urine from eight different animals, including humans. An ancient yoga manuscript called Shivambu Kalpa describes auto-urine therapy, and references also appear in the Damar Tantra. Buddhist and yogic traditions have documented centuries of urine drinking as a spiritual or health practice. In the West, a 1944 book called “The Water of Life” by John Armstrong popularized the idea for English-speaking audiences.
In parts of Africa, urine has been traditionally administered to babies and young children during febrile convulsions. In 19th-century Europe, cow’s urine was used as a diuretic for fluid retention. These historical uses reflect the medical frameworks of their time, not evidence that would meet modern standards of safety or effectiveness.
What Proponents Claim
Advocates of urine therapy attribute a wide range of benefits to the practice. Claims include boosting the immune system, treating cancer, clearing skin conditions, curing infections, and improving general vitality. Some proponents recommend drinking a glass of morning urine daily. Others suggest applying it topically for acne, eczema, or wound care, or using it as eye drops or nasal rinses.
One argument that sounds plausible on the surface involves urea, the most abundant solute in urine. Urea is genuinely used in dermatology. Pharmaceutical skin creams contain it at concentrations of 2% to 10% for moisturizing, 10% to 30% for exfoliation, and above 30% for removing dead tissue. But urine contains roughly 2% urea in an uncontrolled, unsterilized solution alongside waste products. Purified, pharmaceutical-grade urea in a formulated cream is a fundamentally different product from raw urine applied to the skin.
What the Evidence Actually Shows
No clinical trials have demonstrated that drinking urine treats or prevents any disease. The claimed benefits rely on anecdotal reports and traditional use rather than controlled studies. Some Ayurvedic researchers have explored whether compounds found in urine might have biological activity in laboratory settings, but isolated compounds in a petri dish tell you very little about what happens when a person drinks a complex waste fluid.
The National Capital Poison Center states plainly that urine contains toxic waste substances and that drinking it can make you sick. Common effects of swallowing urine include nausea, vomiting, and diarrhea.
Documented Health Risks
The risks of urine therapy go beyond an upset stomach. A case report published in 2022 described a severely debilitated patient who developed dangerous hypernatremia (extremely high blood sodium) and acute kidney injury after ingesting his own urine. The mechanism is straightforward: urine contains concentrated sodium and urea. When you drink it, the high urea levels in your blood trigger osmotic diuresis, meaning your kidneys actually flush out more water trying to deal with the reintroduced waste. You end up more dehydrated than before, with rising sodium levels that can affect brain function, cause seizures, and become life-threatening.
This risk is especially dangerous for people who are already dehydrated, elderly, or have compromised kidney function. But even in otherwise healthy individuals, regularly consuming a fluid your body classified as waste creates an unnecessary burden on the kidneys and disrupts the electrolyte balance they work to maintain.
If you take medications, the risk compounds further. Drug metabolites excreted in urine can be reintroduced at unpredictable concentrations, potentially causing toxicity or interactions that are impossible to dose-control.
Why the Practice Persists
Urine therapy endures for several reasons. Its ancient pedigree gives it an air of time-tested wisdom. It costs nothing, which makes it appealing to people without access to healthcare. And the logic can feel intuitive: if the body produces it, maybe the body can use it. Social media has amplified these ideas, with wellness influencers presenting urine therapy alongside other “natural healing” practices.
The core misunderstanding is about what urine represents. It is not a reserve of useful nutrients your body accidentally discarded. It is the end product of a filtration system designed to keep your blood chemistry within a narrow, livable range. Your kidneys already reclaimed everything worth keeping. What remains is precisely what needed to go.