How do you take Kuro Kosen? How many a day, when to mix it, and how much water

Short answer: Take 1-2 sachets of ZENSO Kuro Kosen a day, your choice. On one, take it in the evening before dinner (after dinner or at bedtime works too); for most people that's enough. On two, take one before lunch and one before dinner. Mix with 200ml room-temperature water, shake well and drink straight away, or make a jelly: 100ml hot water, shake well, then chill in the fridge for an hour. Don't go over 2 a day. It contains konjac, which swells with water, so never swallow the powder dry. For the first two weeks, drink more water than you think you need. A box of 30 sachets (15 Prune, 15 White Peach) lasts 30 days at one a day, or 15 days at two.

How to take it at a glance

On one a day: take it in the evening

For most people, one sachet in the evening is enough. Before dinner is a good time: konjac swells with water in your stomach for real fullness, so dinner ends earlier on its own. After dinner or at bedtime works too, whichever fits your day. The ZENSO daily routine follows the same pattern: Mizu and Daitto in the morning, Shuga and Oiru before meals, Kosen in the evening.

If you often forget, keep a sachet on the dining table or next to your water glass and tie it to dinner.

On two a day: before lunch and before dinner

If you eat out with very little fibre during the day, or tend to overeat at both meals, take two: one before lunch and one before dinner. One or two is your choice; just don't go over 2 a day.

How much water?

Soluble fibre draws in water, so the more water you drink, the better it works.

• Mix every sachet fully before you take it: 200ml room-temperature water to drink, or 100ml hot water for a jelly.
• For the first two weeks, drink more water during the day than you think you need.

What happens in the first weeks?

• Weeks 1–2: the soluble fibre draws in water and, with Nutrallax® prune essence, your bathroom routine evens out first. Konjac fills the stomach, so meals end earlier on their own.
• Weeks 3–8: fed with the fibre they were missing, good bacteria settle back in bit by bit. This is the quiet part: it's happening before you can feel it.

What can you take it with?

• ZENSO Advance: designed to go together. Kuro Mizu and Kuro Daitto in the morning, Kuro Shuga and Kuro Oiru chewed before lunch and dinner; Kosen before dinner, or before lunch and before dinner if you take two.
• Probiotics: yes. Probiotics supply the bacteria; Kosen supplies their food.
• Prescription medicine: take it at a different time from Kosen, and ask your doctor or pharmacist first.

Who should ask a doctor first?

• Pregnant or breastfeeding women
• Anyone on medication (including weight-loss jabs or other GLP-1 drugs) or managing a long-term condition; never stop a medicine on your own
• Anyone with coeliac disease or a wheat allergy
• Anyone with difficulty swallowing, or a history of oesophageal or bowel obstruction
• Under 18: not suitable

Not feeling anything? What to adjust

1. Check you take it every day: a steady rhythm over months is what matters.
2. Check your water: mixed too thick, or too little water in the day, and the fibre doesn't work as well.
3. Give it time: bathroom changes usually come in 1–2 weeks; fullness builds over weeks. Anything that claims to kill your appetite on day one is a stimulant.
4. Ask your advisor: they'll help you decide between one and two a day, when to take them and how much water to drink around your meals and routine. Take it as directed for the full 30 days and feel no genuine difference? You get a full refund.

Frequently asked questions

Do I choose Prune or White Peach?

No need. Every box has 15 Prune and 15 White Peach sachets. Alternate them however you like.

Can I swallow the powder dry?

No. It contains konjac fibre, which swells with water. Always mix it fully in plenty of water before drinking.

What if I miss one?

No problem. Carry on as usual next time. Don't double up, and don't go over 2 a day.

Can I take it during the day?

Yes. On two a day, take one before lunch and one before dinner. On one a day, we suggest the evening: before dinner is best, and after dinner or at bedtime works too.

Can I make it into a jelly?

Yes. Mix one sachet with 100ml hot water, shake well and chill it in the fridge for an hour before eating. To drink it, shake it in 200ml room-temperature water and drink straight away.

I'm already on a ZENSO set. Do I need to buy it separately?

ZENSO Pro already includes 2 boxes of Kuro Kosen, so no. ZENSO Lite, Advance, GLPro, Keep Burn and the 7-Day Trial Pack don't include Kosen, so you can add it on its own.

Buy or learn more

For the full formula, prices and packs, go to the Kuro Kosen product page. Not sure it suits you? Ask an advisor first.