i used to wonder how i could be 4-5% body fat and not have ab definition like the fitness models, the answer is lighting, flexing, angle, oiled up, and being a master of dehydration, go 1 or 2 days without water and consume no more then 20mg of sodium, consume very little potassium, you might be bloated a bit in the lower belly if you are intolerant to lactose, gluten, nuts, soy, etc you would have to avoid those foods.basically i wouldnt suggest doing any of this unless you are going to the beach or swimming pool and want to show off your abs to the ladies for the day. there is probably a lot more secrets i dont know for im not a pro bb or fitness model. i can tell ya even at 4% body fat i dont have bulging abs unless i flex or have no water in me.
Same problem here, dude

I got my abs showing & everything, but the skin at the bottom is just not budging. It could be down to just genetics. I feel if I lose any more body fat, I'll just pass out or die. I'm at 5% and still no definition below the belly button

. Some people just have a very flat lower abs muscle, so no matter how hard you work, you'll never have that son of a bitch showing. I don't think you should trouble yourself too much about it. Like Borracho said, the stuff you see on fitness models is tricks & lighting. Nobody walks around with chiseled abs unless they flex really hard
