Oprah Winfrey notably lost weight in the second half of 2023 and impressed fans with her slim frame when she attended the Golden Globes in January.
The TV star has shared more about her transformation which she achieved with the help of weight loss medication.
Oprah did not disclose the name of the medication she used but said it was a "medically approved prescription for managing weight" and she combined it with a healthy diet and exercise regime.
The TV star explained she started "hiking three to five miles every day" after having knee surgery in 2021 and she drinks around four litres of water a day.
Oprah Winfrey has discussed her weight loss
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She has spoken about weight loss medication
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Oprah spoke more about how she changed her attitude towards food in a new programme An Oprah Special: Shame, Blame and the Weight Loss Revolution.
The 70-year-old explained she had struggled with her weight and constantly thought about food, already planning what she would eat for lunch while eating her breakfast.
However, she can now eat the same foods and be satisfied without eating excessive amounts.
Oprah said: "This is what I got for the first time after I took the medication - all these years I thought all of the people who never had to diet were just using their willpower and they were for some reason stronger than me.
"Now I realise you weren’t even thinking about the food. It’s not that you had the willpower, you weren’t thinking about, you weren’t obsessing about it. That is the big thing I learned.”
She spoke of the "disease" of obesity and explained how her attitudes towards food have now changed.
The journalist added: "Being on the medication... now I can eat half a bagel and be fine. I still want the bagel, I just want less of the bagel."
Oprah discussed her transformation to remove the "stigma, shame and judgement" from obesity after explaining she has been ridiculed for many years over her weight.
Oprah previously said she uses medication "as I feel I need it, as a tool to manage not yo-yoing".
Weight loss medications can be taken in extreme cases to help with obesity and should only be used when prescribed by a doctor.
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Oprah Winfrey has showcased her impressive transformation
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Three drugs approved by NHS are orlistat, liraglutide and semaglutide and are offered to treat obesity.
GPs in the UK can also advise those hoping to lose weight on how to do this safely with lifestyle factors such as healthy eating and regular exercise.
This comes as a doctor shared the high calorie drink slimmers should ditch if they are trying to drop a few pounds.