Psyllum Husk powder. I have about 5 or 6 grams each time I have it, that is roughly a teaspoon. I have it once or twice a day. Mix it with some liquid in a small shaker cup, shake for about 5 seconds and drink it down. Make sure you have it with food, I often have it a few minutes before a meal. There are some commercial mixes with flavors and artificial sweetners, I instead just buy the powder with no flavoring added.
I initially tried putting it in a glass with liquid and stirring, but it did not mix as well so I bought a small shaker cup. Maybe that is where James Bond got the idea?