Is it true that human cells grow in levorotation?
I remember reading this in a popular science magazine, some 20 years ago: that in most of the living organisms, cells grow in levorotation and very few grow in dextrorotation.


There is a kernel of truth in what you wrote, but either the science fiction magazine or your memory has distorted things a fair bit.  Cells do not grow "in levorotation" or "in dextrorotation".  Chirality is not a property of cells, it is a property of the individual molecules that comprise the cell.  Many different types of molecules are essential for life and are found in all living cells.  

Two examples of these ubiquitous, essential molecules are carbohydrates and amino acids.  In all organisms on Earth, most carbohydrates are found in what is known as the D configuration.  The "D" stands for "dextrorotatory" but the nomenclature is confusing.  For carbohydrates, the configuration is defined as relative to glyceraldehyde, a simple sugar.  Thus D-fructose or D-glucose have the same configuration as D-glyceraldehyde, but only D-glyceraldehyde is guaranteed to be dextrorotatory.

Amino acids in life on Earth are predominatly "L", meaning they share an absolute configuration with L-glyceraldehyde.  


  Is that true, at least for humans?


So humans, like most life on Earth, is made of a mixture of levorotatory and dextrorotatory molecules.  Some types of the molecules in humans are predominantly dextrorotatory and some are levorotatory.