Collagen supplements are generally considered safe while breastfeeding, but it's always a good idea to consult with your healthcare provider first. 

Collagen is a protein that supports skin, hair, nails and connective tissues in the body. While collagen supplements are widely used, there’s limited research on their specific effects during breastfeeding.

The good news is that collagen is a naturally occurring protein found in many foods, so your body is already getting some collagen through your regular diet. Taking collagen supplements can provide an additional boost, but it's important to choose reputable brands and follow recommended dosages.

Before introducing any new supplements into your routine, including collagen, make sure you talk with your doctor.