United Kingdom, Dec. 30 -- Oprah Winfrey feels "more alive and more vibrant" since she started using GLP-1.

The 71-year-old TV star started using weight-loss medication two and a half years ago, and she admits that GLP-1 has transformed her life.

Oprah told People: "I thought it was about discipline and willpower. But I stopped blaming myself.

"I feel more alive and more vibrant than I've ever been."

Oprah admits that she now feels happier in her own skin.

She said: "I'm not constantly punishing myself. I hardly recognise the woman I've become. But she's a happy woman."

By contrast, Oprah previously felt "embarrassed" by her appearance.

She explained: "I've always been confident in whatever I was doing, but I was at the same time d...