Broccoli's all right but not a favorite. I eat it. If my husband had his way, he would have it daily. The best broccoli, though, is on a baked potato! Yum!
When I was at school, we used to eat jelly cubes. You don't have them in the US, but I seem to recall it was the gelatine in them that was meant to help strengthen nails.
But that doesn't have the qualities of collagen that gelatin has for nails right? at that point pectin is a thickener. I know I could find a substitute for gelatin in foods but I don't think there is one out there that is the collagen source for nails/hair.