The troubled actress has reportedly checked herself out of Utah`s Cirque Lodge facility - where she was rumoured to have been receiving treatment for "an eating disorder and addiction issues" - to go "on vacation" at an undisclosed location.
A source told E!: "She`s in no rush to get back to L.A. She`s on total lockdown and only talking to a small group of people."
Demi - who was hospitalised in January after suffering a seizure - was recently said to be taking her recovery very seriously.
A friend previously explained: "She is totally committed to getting better.
"Demi has a long way to go, but she is getting better. She has many days where she feels great."
Last month, Rumer Willis - the 49-year-old star`s eldest daughter with ex-husband Bruce Willis - revealed Demi, who split from husband Ashton Kutcher in November amid speculation he had cheated on her, is on the "road to recovery" and insisted the whole family "believe in her".
The 23-year-old actress said: "Of course the situation weighs heavily on me.
"My mother is on the road to recovery. It`s slow going but we believe in her."