Skinny Land

 Britney Spears father was concerned that she is self-medicating with over-the-counter diet pills and energy drinks since she isn’t able to get her hands on anything else.

The pop star’s conservator-dad, Jamie, was especially alarmed when he caught his daughter popping over-the-counter diet pills, which she washed down with Red Bull, before a recent performance. “Britney was definitely trying to get high by taking too many diet pills and energy drinks,” says a family insider. “Jamie thinks the combination of the two is making her whacked-out and, causing her to lash out in weird angry rampages.”

“Britney uses green-tea supplements, [Lab 88's herbal ephedra-free] Metabo Speed XXX, Dexatrim and apple cider vinegar to control her weight and energy levels,” adds the insider. “She also pours those 5-Hour energy drinks into her Red Bulls.”

To stay out of trouble with her father, “Britney has her assistant buy the over-the-counter items for her,” says the source. “But she told Kevin about it because she doesn’t want him to think that she is addicted to harder stuff and take her two sons [Sean Preston and Jayden] away from her.”

Don’t try this at home please. Mixing that many OTC uppers would kill anyone with normal chemical balances.