How do I decide whether a scalp care session is worth the cost?

There is no single answer to whether it is worth the cost, but there are verifiable judgment methods: look at the quality of the process - whether it is tested first, whether the steps are consistent with the instructions, and whether the time is sufficient; whether there are hidden add-ons; and whether the effect expectations are truthfully informed (period, individual differences), rather than being verbally promoted.

In terms of costs, long-term costs depend on the service and frequency, and are subject to location announcements. It is recommended to set the frequency according to the test results and personal budget, and not to pay a large amount in advance; be wary of words such as "it must be done for a long time to be effective".