The actress is a fan of rehydration remedy Mercy and was so impressed by its results she recently invested in the company that produces it.
"I went ahead and invested in the company," Paltrow said on her blog. "Mercy is a drink that is almost like a health elixir - packed with amino acids, vitamins, minerals and herbs that protect your system against the inevitable hangover and that flush you can get from drinking.
"You can drink it alone or mix it with alcohol to create a hangover-preventing cocktail. I also drink one if I'm just feeling tired to give my system a boost."
The Iron Man star also recommenced the 'hair of the dog' as a cure for the night before.
"At times, a little of last night's poison does the trick," she said. "There's a Bloody Mary at 10am. And keep it going all day."
Paltrow has previously admitted to heading to the sauna to sweat out her hangovers.