Yup I think this series is awesome, but not growth-wise. Despite the number of pills they're eating the girls are not actually growing
Pokkuti doesn't seem able (or doesn't want) to make muscles grow past a certain point. He's never done pics of outrageously huge muscles, he sticks to a huge-but-still-anatomically-believable size. I think there's no point in making the girls eat a thousand pills, perhaps some strength feats to show what they can do might be better
(I'm not a growth-only fanatic, I enjoy the size the girls have already achieved
)