Dietary manipulation using Lorenzo's oil has been shown to lower blood levels of very long chain fatty acids, but it is ineffective in symptomatic ALD. Moser's 2005 study has found "strongly suggestive, albeit not fully definitive, evidence of a preventive effect" of Lorenzo's oil on the onset of symptoms when used by asymptomatic patients.

https://en.wikipedia.org/wiki/Lorenzo's_oil

Was the movie a lie