Table 2.

Representative studies of new strategies of hair loss treatment.

Treatment	New strategies
	Microneedling	FRF	LLLT	Excimer lamp	CO2 laser	PRP	DPC	UC-MSCs	AD-MSCs	BM-MSCs
Types	AGA and AA	AGA	AGA	AA	AGA	AGA	PHL	AA	AGA	AA and AGA
Patients	50 patients	25 patients	110 patients	105 patients	45 patients	25 patients	65 patients	3 patients	3 patients	40 patients
Dosage	Microneedling (needle length, 0.5 to 1.5 mm), 15 times a week	Ten treatment sessions at 2-week intervals	For 15 min, thrice a week for 26 weeks	308-nm excimer lamp	50-mm tip, 12-18 mJ/spot, 361 spots/cm2	Once a month for 3 months	7.1 × 107 autologous DSCs	1 × 106 cells/mL, twice a month for 12 months	Cell suspension, injected subcutaneously	1 × 104 cells/mL, injected intradermally
Treatment results	Hair shaft thickness↑	Hair count↑ Hair shaft thickness↑	Hair density↑ Hair loss↓	Hair loss↓	Hair count↑ Hair thickness↑	Hair density↑	Hair density↑	Hair regrowth↑	Wounds↓ Hair regrowth↑	Hair regrowth↑
Adverse effects	Pain, bruising, and discomfort at site	Scalp pain and slight burning sensation	Scalp tenderness, paresthesia, and mild urticaria	Scalp pain and slight burning sensation	Scalp tenderness and paresthesia	Scalp pain and pinpoint	Scalp pain and pinpoint	Scalp pain and pinpoint	Scalp pain and pinpoint	Scalp pain and pinpoint
References	74	77	82	86	150	97	108	122	127	130