Arbonne does not promise that you will lose a certain amount of weight as a customer or on its 30 Days to Healthy Living program.
That said, if you consume the low calorie shakes twice per day and consume only one other meal, per the company's recommendation, it's likely that you'll reach a calorie deficit, which could result in weight loss.
However, some of the shakes have just 160 calories per serving. Consuming two of these shakes in conjunction with just one additional meal would likely total too few calories per day for an average adult.