I daven shachris and go straight to work from there without having any chances to eat, so I take a granola bar or a yogurt with me to shachris and eat it on my way to work. If you are always hungry or thirsty by before lighting, then make a point of eating before or be a man and sweat it out.
mik5- In such a case you should ask your LOR (or local CR member) to find out if it’s even muttar.