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Published on: 5/18/2026
The Master Cleanse salt water flush can overload your body with sodium and cause hypernatremia, leading to dehydration of cells and severe symptoms from weakness and confusion to seizures and coma.
There are several factors to consider, including at-risk groups, symptom monitoring, and safer cleansing alternatives. See below for complete details, which could impact your next steps in your healthcare journey.
The "Master Cleanse" salt water flush has gained popularity as a quick way to "detox" the colon. But this so-called cleanse can carry serious risks—most notably hypernatremia, a dangerous elevation of sodium in your blood. Understanding the Salt water flush colon cleanse danger is the first step to keeping yourself safe.
The salt water flush involves drinking a large volume of warm water mixed with non-iodized sea salt on an empty stomach. Proponents claim it:
However, these benefits are largely anecdotal. Scientifically, forcing large amounts of saline water through your digestive tract can upset your body's delicate fluid and electrolyte balance.
Hypernatremia means your blood sodium level is above the normal range (135–145 mEq/L). Here's why a high-dose salt water flush can trigger this condition:
Excess Sodium Intake
Fluid Shifts
Rapid Movement Through the Gut
Early detection of hypernatremia is crucial. Symptoms can range from mild to life-threatening:
If you experience any of these signs after a salt water cleanse, use Ubie's free AI-powered Hypernatremia symptom checker to better understand your symptoms and determine if you need immediate medical attention.
Beyond hypernatremia, a salt water flush can cause:
Certain groups should be extra cautious—or avoid salt water flushes entirely:
If you're seeking digestive support or a gentle cleanse, consider these evidence-based options:
Always discuss any cleanse plan with your healthcare provider first.
If you still choose to do a salt water flush, take every precaution:
Salt water flush complications can become serious quickly. Seek emergency care if you notice:
If you're unsure about your symptoms, you can quickly assess your risk by checking your symptoms for Hypernatremia using Ubie's free AI-powered tool before deciding whether to seek immediate care.
Your health is too valuable to gamble on unproven detox trends. If you experience any worrying signs after a salt water flush, get a personalized assessment of your Hypernatremia symptoms through Ubie's free online tool and speak to a medical professional immediately. Never ignore symptoms that could be life-threatening or serious—always reach out to a qualified doctor.
(References)
* Palmer BF, Sterns RH. Disorders of Water Balance. N Engl J Med. 2023 Dec 7;389(23):2164-2173. doi: 10.1056/NEJMra2305716.
* Klein AV, Kiat H. Detox diets for toxin elimination and weight management: a critical review of the evidence. J Hum Nutr Diet. 2015 Dec;28(6):675-86. doi: 10.1111/jhn.12286. Epub 2014 Dec 18.
* Guglielmi J, Mainguy S, Daugavietis K. [Acute hypernatremia after ingestion of a salt solution for colon cleansing: a case report]. Rev Med Interne. 2013 May;34(5):306-8. doi: 10.1016/j.revmed.2012.04.016. Epub 2012 May 26. French.
* Sterns RH, Nigwekar SU, Hix JK. The treatment of hypernatremia. Semin Nephrol. 2009 May;29(3):281-99. doi: 10.1016/j.semnephrol.2009.03.003.
* Adrogué HJ, Madias NE. Hypernatremia. N Engl J Med. 2000 May 18;342(20):1493-9. doi: 10.1056/NEJM2000051803420009.
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