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Oprah Winfrey

Paul Archuleta/FilmMagic

For those skeptical of the Weight Watchers program, just take a look at its spokesperson, Oprah Winfrey

The media mogul, who became a partial owner after purchasing 10 percent of the international weight loss company last October, is known to practice what she preaches and this program is no different. The 62-year-old public figure has already lost 30 pounds following the system for eight months and recently showcased such results while stepping out on the red carpet. 

Dressed in a form-fitting black blouse and flowing skirt, Winfrey looked confident as she smiled for the cameras at the premiere of her network OWN's new drama series, Greenleaf in West Hollywood, Calif. 

It's not just the number on the scale that Winfrey is pleased with. In a recent Instagram post, she told fans she had just had her best health update yet. 

"Best Health report card ever!Total cholesterol 180.. LDL 82. thanks to #wwsmartpoints #ClevelandClinic #AnnualCheckup," she captioned a gleeful photo of herself posing with her doctor. 

A photo posted by Oprah (@oprah) on

Winfrey, who publicly chronicled her years of struggling with weight loss and yo-yo dieting on her former daytime talk show, attributes her present health success to the sustainability of the program. 

"Every other time I've ever gone on a diet, I've gone on a diet and then gone off the diet, because I had gotten to the weight I'd wanted to be," Winfrey said during a private call with Weight Watchers members in late January. "The difference is, I've made the shift and this is the way I'm going to live for the rest of my life."

A lifetime commitment? According to the executive producer, it's just that easy. 

"I basically eat exactly what I want and if I can't figure out what the points are…I just say I'm going to pass on that," she told members during a phone call in March. "If I can't begin to measure the points, I usually pass."

Best friend and CBS This Morning co-anchor Gayle King is another testament to the success of the system, having joined the weight management program in September 2015 and losing nearly 30 pounds since. "In 9 months have a baby???" she wrote on Instagram this week. "Orrrr lose 27.7 lbs on@ weightwatchers I chose to count points."