A kit comprising: • at least one dehydrated composition to be reconstituted with water and to be taken hot at 60 °C comprising: (a) at least one compound able to generate contractions of the intestine, selected from among sodium sulfate, sodium picosulfates, sodium phosphates; magnesium sulfates; potassium sulfates; polyethylene glycol, alone or in a mixture; (b) at least one osmotic agent promoting water retention and osmotic pressure in the colon e.g. sodium chloride, potassium chloride, sodium bicarbonate, magnesium citrate, alone or in a mixture; (c) dimeticone; (d) at least one vegetable; and • at least one dehydrated composition to be reconstituted with water comprising: (a) at least one compound able to generate contractions of the intestine, selected from among sodium sulfate, sodium picosulfates, sodium phosphates; magnesium sulfates; potassium sulfates; polyethylene glycol, alone or in a mixture; (b) at least one osmotic agent promoting water retention and osmotic pressure in the colon e.g. sodium chloride, potassium chloride, sodium bicarbonate, magnesium citrate, alone or in a mixture; (c) dimeticone; (d) at least one fruit; and • at least one dehydrated composition to be reconstituted with water and to be taken hot at 60 °C comprising: (a) at least one compound able to generate contractions of the intestine, selected from among sodium sulfate, sodium picosulfates, sodium phosphates; magnesium sulfates; potassium sulfates; polyethylene glycol, alone or in a mixture; (b) at least one osmotic agent promoting water retention and osmotic pressure in the colon e.g. sodium chloride, potassium chloride, sodium bicarbonate, magnesium citrate, alone or in a mixture; (c) dimeticone; (d) at least one plant extract; for sequential use thereof to induce elimination of stools prior to colonoscopy. • at least one dehydrated composition to be reconstituted with water and to be taken hot at 60 °C comprising: (a) at least one compound able to generate contractions of the intestine, selected from among sodium sulfate, sodium picosulfates, sodium phosphates; magnesium sulfates; potassium sulfates; polyethylene glycol, alone or in a mixture; (b) at least one osmotic agent promoting water retention and osmotic pressure in the colon e.g. sodium chloride, potassium chloride, sodium bicarbonate, magnesium citrate, alone or in a mixture; (c) dimeticone; (d) at least one vegetable; and (a) at least one compound able to generate contractions of the intestine, selected from among sodium sulfate, sodium picosulfates, sodium phosphates; magnesium sulfates; potassium sulfates; polyethylene glycol, alone or in a mixture; (b) at least one osmotic agent promoting water retention and osmotic pressure in the colon e.g. sodium chloride, potassium chloride, sodium bicarbonate, magnesium citrate, alone or in a mixture; (c) dimeticone; (d) at least one vegetable; and • at least one dehydrated composition to be reconstituted with water comprising: (a) at least one compound able to generate contractions of the intestine, selected from among sodium sulfate, sodium picosulfates, sodium phosphates; magnesium sulfates; potassium sulfates; polyethylene glycol, alone or in a mixture; (b) at least one osmotic agent promoting water retention and osmotic pressure in the colon e.g. sodium chloride, potassium chloride, sodium bicarbonate, magnesium citrate, alone or in a mixture; (c) dimeticone; (d) at least one fruit; and (a) at least one compound able to generate contractions of the intestine, selected from among sodium sulfate, sodium picosulfates, sodium phosphates; magnesium sulfates; potassium sulfates; polyethylene glycol, alone or in a mixture; (b) at least one osmotic agent promoting water retention and osmotic pressure in the colon e.g. sodium chloride, potassium chloride, sodium bicarbonate, magnesium citrate, alone or in a mixture; (c) dimeticone; (d) at least one fruit; and • at least one dehydrated composition to be reconstituted with water and to be taken hot at 60 °C comprising: (a) at least one compound able to generate contractions of the intestine, selected from among sodium sulfate, sodium picosulfates, sodium phosphates; magnesium sulfates; potassium sulfates; polyethylene glycol, alone or in a mixture; (b) at least one osmotic agent promoting water retention and osmotic pressure in the colon e.g. sodium chloride, potassium chloride, sodium bicarbonate, magnesium citrate, alone or in a mixture; (c) dimeticone; (d) at least one plant extract; for sequential use thereof to induce elimination of stools prior to colonoscopy. (a) at least one compound able to generate contractions of the intestine, selected from among sodium sulfate, sodium picosulfates, sodium phosphates; magnesium sulfates; potassium sulfates; polyethylene glycol, alone or in a mixture; (b) at least one osmotic agent promoting water retention and osmotic pressure in the colon e.g. sodium chloride, potassium chloride, sodium bicarbonate, magnesium citrate, alone or in a mixture; (c) dimeticone; (d) at least one plant extract;