Some Lactic acid bacteria (LAB) may act as probiotic bacteria (Streptococcus thermophilus, lactobacillus delbrueckii subsp. bulgaricus, lactobacillus helveticus and lactobacillus acidophilus) .enhancing the growth of these bacterial species being grown separately or in combination was attempted , so as to increase numbers  to attain the squared healthy levels .examination was carried out to evaluate the effect of the examined cultures, whether separately or their combinations by evaluating the maximum turbidity being occurred in the examined selective growth broths  .  Intensive turbidity resulted in the combinations of the examined cultures, compared with the individual strains. Mean while, the examined single or combined culture varied due to the single species or involved in the mixed cultures.  Bifidobacterium  bifidum in combination with any of the examined lactic acid bacteria reached the maximum growth after shorter time  of incubation ,compared with its growth simply ,and attained more growth and reached more members reuired  for the healthy dose.