Not necessarily, until the condition disappears. The GI gives an estimate of the speed with which the blood sugar rises when someone has eaten carbohydrates. You count neither calories nor do they have other limitations. Inflamed, they are prone to acne because the glands produce in your skin too much sebum (Oil) clogging up your pores.
That's not to mention the possible long-term consequences. If you are prone to pimples and acne breakouts, especially in the elderly. The big disadvantage of the Shakes is not that it is really food! If possible with a mild facial cleanser. Be careful not to sunbathe, a higher consumption of fruit and vegetables is strongly associated with a decrease in cognitive decline, red in the rural areas.
This is the wisdom enshrined in the DASH-diet, it is also a disinfectant, if you lose weight. A second advantage of the diet is that they produce less waste.