Starvation comes when due to lack of food or nutrients ; you have depleted all your body stores ,atrophying the muscles and organs. Intermittent fasting is a break in continuous eating : when your body maintains out of it's own fat reserves, and rids you of harmful toxins that you consume in the Modern Diet on a daily basis.
This also means that how well you move into a cycle of short, intermittent fasts depends on how stable your blood sugar already is.If you have been eating clean and exercising regularly, fasting will be easier- because acute blood sugar falls will not plague you. For people having problems with fasts :problems do not mean that fasting can not be/should not be done by you.Only that if you are at the base of a mountain ,climbing up will take a bit more time and effort .And trying to run before walking may put you off the whole thing. A regime of weekly fast IMHO is better for someone who feels l ow ,headachy,nauseous or jittery with a missed meal .