Why is it not advisable to apply eyelash extensions during the anagen stage of growth?

Applying eyelash extensions during the anagen stage of growth is particularly unadvisable because lashes applied during this phase can result in an unnatural appearance once the natural lashes reach their full growth potential. The anagen phase is when lashes are actively growing, and they tend to be shorter compared to those in other growth stages, such as catagen or telogen. If extensions are applied when the natural lashes are in this shorter growing phase, the extensions may end up looking overly long or out of proportion as the natural lashes continue to grow and lengthen.

As the natural lashes reach full growth after leaving the anagen stage, the extension-to-natural lash ratio will change, which can lead to a visually unbalanced look. This discrepancy can detract from the overall aesthetic of the eyelash extensions, causing them to appear mismatched or inappropriate for the length of the new natural lashes.

Considering the other options, it’s crucial to understand that while concerns about shedding, potential damage to natural lashes, and uneven application may arise from other growth phases or factors, the core issue during the anagen stage is the mismatch in appearance as the natural lashes develop further. Thus, timing the application of eyelash extensions is essential to achieving a desirable and harmonious look.