Eat bread before drink beer make you drunk less? My friends says if you eat some bread it will absorb the alcohol and make you high less. is it true?
Your liver processes alcohol at a fixed rate (what that rate is depends on your tolerance, current liver function, what medications you are taking, and some genetics). So eating some food, particularly foods that absorb fluids like bread, will slow down the rate of alcohol absorption into your bloodstream, allowing your liver more time to metabolize the alcohol. 

So for a fixed amount of alcohol, drinking on a full stomach will make you FEEL less drunk because you spread out the alcohol absorption over time so your liver has more time to metabolize it.

However, you can still saturate your livers ability to metabolize alcohol by ingesting high volumes of alcohol and the absorptive ability of the food in your stomach is limited (unless you vomit it out) so it is FAR from reliable technique to drink but avoid becoming intoxicated or hungover since you are still absorbing all the ingested alcohol, just over a slightly longer period of time.