Hair thinning, and it can often be the symptom of something serious. Low levels or deficiencies in these can result in slow hair growth or worse, thinning. Pin on mediumhaircutsforwomen While hair might begin thinning or falling for some people at a young age, most often, people experience the condition later in adulthood as they reach their 30s, 40s, or 50s. Hair thinning on sides female . While male or female pattern baldness is permanent, there are certainly measures you can take to slow it down and treat it. Some companies and salons offer products designed for thinning hair, but they may be pricey. Before learning signs of hair thinning, it is important to understand what average hair fall looks like, and what may cause hair loss in the first place. Underlying causes for hair loss. The trouble is, female pattern baldness causes thin hair all over, so good donor sites may be limited. But the most common cause of a thinning ponytail is androgenetic alopecia, also called...