Adrienne, 36, wasn't afraid to pose in a bikini for her 4.9 million Instagram followers.
In the caption she wrote: "During this time more than ever... Staying healthy is at the top of my mind!
"This is my first post in a bathing suit since losing 20lbs.
"Now...I’ve lost weight before but always gained it back... because I was dieting & not changing my lifestyle!
"But not this time... It’s been a year since I 'had enough.' (Have you ever gotten there? Where you’re just tired of complaining about what you don’t like & you’re finally ready to take action & REALLY make changes)."
host explained on Instagram that she made "major changes" with "food and working out" and decided to eat plant base.
She added: "I’ve been consistent with my self discipline (although it’s been so hard at times).
"I’m constantly reminding myself that the greatest form of self love - is self discipline!"
Adrienne explained that it takes "21 days to form a new habit" and offered her followers more advice and encouraged them to develop "healthy habits."
She wrote: "Drink your water, squat, rest, read, pray, take your vitamins, eat your veggies!
"It’s a new month! Let’s do this! BESOS xx."
The talk show host's followers took to the comments section to compliment her weight loss.
One wrote: "You look amazing!"
Another said: "You look fantastic, Adrienne!
"And most importantly, so happy that you’re FEELING fantastic, too!"
A third wrote: "Proud of you and feeling inspired!"
Before the start of 2020, Adrienne shared a YouTube video about her 20 pound weight loss titled, "My Weight Loss Journey."
She explained that her journey wasn't just a "body makeover," but a "mind, body, and soul" makeover.
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On her , she has kept fans updated with her progress with other videos such as "What I Eat In A Day" and "My Health & Fitness Summer Essentials."
Adrienne has been married to husband Israel Houghton since 2016 after the two wed in Paris.