Hello,
have you considered offering a product with reduced protein content?
According to this review from Harvard Health, the recommended protein intake on a daily basis is 0.8 grams per kilogram body weight: https://www.health.harvard.edu/blog/how-much-protein-do-you-need-every-day-201506188096
An average man in Europe is 180cm tall and has a BMI of approximately 25. That gives a recommended daily intake of 64 grams of protein. Given 3 shakes and 2100 daily calories, you would get 90 grams a day with the current nutritional content.
Do you often really take three shakes a day? I don't think that happens often in practice, but I could be wrong, of course.
No, I don't, but even with one shake a day I think you'll easily go above the recommended limit. At least I find myself restricting the natural amount of protein I would have for the two other meals, becuase I feel it's too much.