Hi, Thanks for using the HCM. I am happy to address your questions, there are many causes of scalp hair loss. Losing up to 100-150 hairs per day is normal. Human hair naturally grows in three phases: anagen, catagen, and telogen. Anagen is the active or growing phase. Catagen is a fairly short phase of the natural hair cycle during which hairs begin to break down. Telogen is the resting phase. The hairs that are shed daily are often in the resting or late phase in the hair cycle. Normally, about 10% of the scalp hairs are in the resting or telogen phase at any time. These hairs are not growing and are getting prepared for cyclic shedding. Most hair loss is not associated with systemic or internal disease, nor is poor diet a frequent factor. Frequently, hair may simply thin as a result of predetermined genetic factors, family history (not in your case), and the overall aging process. Many may notice a mild and often normal physiologic thinning of hair starting in their thirties and forties. Other times, normal life variations including stress, nutritional and hormonal changes may cause a reversible hair loss. Several health conditions, including thyroid disease and anemia can cause hair loss. While thyroid and other lab tests are usually done, it is important to exclude underlying causes in sudden or severe hair loss. If you are concerned about underlying concerns for hairloss, you may start by seeing your physician for health screening or dermatologists to provide advanced diagnosis and treatment. Sometimes a scalp biopsy may be taken to help in diagnosis of severe or unexplained hair loss. Hope I have answered your query. If you have any further questions I will be happy to help. Thanks