Cheryl has told how in the past she has suffered from "overthinking and under-sleeping" and turned to the doctor for sleeping pills.
The Fight For This Love singer opened up as she plugged her vitamin range on Instagram.
She told her fans that when she previously had trouble getting a good night's sleep she took medication but that it left her feeling "groggy" when she got up the next day.
The mum-of-one said: "If you're anything like me and have trouble with overthinking and under-sleeping then you should definitely try the Sleep Feel vitamin.
"It has natural ingredients, magnesium has been proven to help aid sleep. It has also got similar ingredients to what your body creates as melatonin, it really helps.
"I used to call the doctor when I couldn't sleep, for sleeping pills, but I would always feel groggy and couldn't get going the next day.
"But this you feel amazing in the morning and it's really helpful, natural, restful sleep."
Cheryl, 38, has kept quite a low profile on social media since the death of her Girls Aloud bandmate Sarah Harding.
Sarah passed away in September following a battle with cancer, and Cheryl later pulled out of Birmingham Pride, saying she was not "emotionally, physically or mentally able to perform" because of her grief.
She told fans at the time: "Saying goodbye to somebody you spent such a massive piece of your life with is like nothing else.
"My heart is heavy. Grief is such a harsh experience and an absolute rollercoaster of emotions.
"Questions without answers and pain without resolve. So tumultuous and constant."
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