It’s not a weight loss program. It’s about being aware of your choices, and how many of the choices we make in a day are more habit than a conscious choice. A small amount of port, for me, is far less habit-forming than sweets, especially less than once a week! I have a bottle of port that’s half full, after I’ve had it two years. A half full package of cookies, OTOH, wouldn’t last a day around me.