Does Kuro Mizu have side effects? Safety tests and who should ask a doctor first (2026)

Short answer: ZENSO Kuro Mizu is a ready-to-drink botanical sachet that Malaysia's NPRA classifies as a food. The most common thing people notice is a few more toilet trips in the morning. That's the extra water leaving, which is why you take it when you wake and not at night. SGS tested it against 365 drugs and for heavy metals, and found none. If you are pregnant or breastfeeding, on medication (especially diuretics or blood-pressure medicine), or have kidney or heart problems or a long-term condition, ask your doctor before taking it.

Safety tests

What might you notice?

• More toilet trips: possibly in the morning, as CactiNea™ and juniper help your body release extra water.
• Disturbed sleep if taken at night: so take it when you wake, not at night.
• Allergy: it contains honey. If you are allergic to honey or any ingredient in the formula, don't take it.

If you notice ongoing discomfort, a rash or anything that worries you, stop and ask your doctor.

Who should ask a doctor first?

• Pregnant or breastfeeding: ask your doctor first.
• On medication, especially diuretics or blood-pressure medicine: ask your doctor or pharmacist first.
• Kidney or heart problems, or a long-term condition: ask your doctor first.
• Children: ask a doctor first.

When should you see a doctor first?

If swelling comes on suddenly, hurts or won't go away, see a doctor first. Don't rely on Kuro Mizu. It is made for everyday puffiness from salty food and long hours sitting, not for any medical condition.

Frequently asked questions

Will Kuro Mizu make me run to the toilet all day?

You may go a little more in the morning as the extra water leaves. That's why you take it on waking: it happens in the morning and doesn't affect your sleep.

I take blood-pressure medicine. Can I take it?

Ask your doctor or pharmacist first. Anyone on medication, especially diuretics or blood-pressure medicine, should check before taking it.

Does it have sugar?

A little. It contains honey, so it isn't 'no added sugar': each 10 ml sachet has 7 kcal, 0.5 g of sugars and just 2 mg of sodium. That's a small amount, but if you're watching your sugar or have diabetes, ask your doctor first.

Can Muslims take it?

Yes. It is JAKIM Halal certified, and Halvec, a JAKIM panel laboratory, found no porcine DNA.

Can pregnant women or children take it?

If you are pregnant or breastfeeding, ask your doctor first. For children, ask a doctor first too.

Buy or learn more

For the full formula and test details, go to the Kuro Mizu product page. For the most comfortable way to take it, read how to take Kuro Mizu.