If that were true, you could solve your cravings by taking a simple multivitamin. Which just isn’t the case unless you’re critically deficient in something (which, most 1st world people aren’t). Eating fast food 3 meals a day but taking a multivitamin will change nothing about your feelings of hunger.

What’s more likely, is fast food doesn’t make you feel full because its low in protein (the most expensive ingredient typically, so fast food skimps on it) and high in simple carbs.