I am not a nutritionist or trichologist, but I have been doing hair for various ethnicities for over 10 years now.
If you are losing more than the average or "normal" amount of hair from shedding which is up to 100 strands a day, than there is nothing to be concerned about, however, if you are losing a lot of hair when shampooing you may want to check the shampoo you are using.
For instance, sulfates: laurel/laureth sulfates and parabens: propylparaben, methylparaben, and overly acidic shampoos can cause dryness which leads to breakage and split ends. If they hair splits up the shaft it will cause shedding.
Look for shampoos that are sulfate and paraben free. Also, look for pH balanced shampoos with moisturizing properties, such as vitmain e, organic sea kelp, aloe, etc. A good shampoo is essential for nourishing the hair shaft and helping to smooth the hair cuticle. If you find your shampoo is not the cause of your hair loss, please visit your primary care physician to find out if you are deficient of zinc, omega fatty acids, vitamin c or other vital vitamins required to keep you healthy from the inside out.