From 1 to 3 sachets per day, as needed :

To effectively colonise the gut : 3 sachets per day for 10 days (1 sachet on an empty stomach in the morning, 2 sachets at bedtime).
During maintenance treatment : 1 sachet at bedtime, for 1 month.
On the eve of a sports competition or during endurance training : 3 sachets distributed throughout the day

On the day of the competition : 3 sachets in the morning, diluted in the energy drink.