Placeholder. Handheld scalp-analyzer devices that connect to a phone app are turning hair care from a one-time shampoo-purchase decision into an ongoing diagnostic-monitoring behavior — the exact same pattern found in sun care's wearable UV-sensor boom, just applied to a completely different category.
What we've found so far: Consumer handheld scalp scanners monitor sebum levels, dryness, and bacterial balance in real time via connected apps, directly paralleling the UV-sensor wearable cluster found in sun care research.
Open research: Cross-reference specific scalp-analyzer brands/products directly; interview a trichologist on whether the diagnostic data these devices provide is actually clinically meaningful.