Kylie Jenner has gone to extremes to lose her baby weight since welcoming baby Stormi, Life & Style reports.
The publication claims to have exclusively learned that the 20-year-old dropped a whopping 15kgs in just weeks and is continuing to lose.
'Kylie is obsessively dieting and exercising,' confirms a source. 'She's counting calories and tries to stay under 1000 calories a day while also working out three hours a day, five times a week.'
Life & Style reports that friends close to the star are seriously worried and regularly warn her to slow down.
The new mum stepped out in Los Angeles last week wearing skintight bike shorts and flashing her midriff, shocking fans at how trim she looked.
But, according to Life & Style, Kylie is still unhappy with her dramatic results.
A source spills, 'Despite losing such a huge amount of weight in such a short period of time, Kylie still complains to friends that she's 'fat' as she squeezes on her stomach and thighs.'
'Even Kris has shown concern about her daughter's new obsession,' the source adds.
Kylie hasn't responded to Life & Style's claims.