Reality television star Khloe Kardashian gave birth to daughter True on April 12, and this week, she’s opened up about why she had to stop breastfeeding and use formula instead.

The 34-year-old tweeted: “I had to stop breastfeeding. It was hard for me to stop (emotionally) but it wasn’t working for my body. Sadly.”

Kardashian added, “Ugh it wasn’t that easy for me.”

“I tried so very hard to continue.”

I had to stop breast feeding ???????????? it was really hard for me to stop (emotionally) but it wasn’t working for my body. Sadly

— Khloé (@khloekardashian) July 7, 2018