Have any mummies out there tried cuppy up collagen while breastfeeding?

Hi mama! I haven't tried Cuppy Up myself, but from what I hear from other mums, it seems to be more focused on skin elasticity and firmness rather than directly boosting milk supply, so it shouldn't hurt your production, but it's also not a galactagogue like oats or brewers yeast are. A few mums I know have used collagen supplements while breastfeeding without issues, though everyone's body is different. Since you're looking to protect your milk supply, I'd say it's worth checking with your doctor or lactation consultant first, they can tell you if there's anything in the ingredient list that might affect you personally, and they might also recommend something more targeted if milk production is your main concern. All the best with your feeding journey!