Table 2.

Microneedle materials employed for current technological application [6].

Type of Microneedle	Materials Used	Reference
Disposable	Carboxy-methyl-cellulose	[29]
Multi-round responsive	Alginate	[30]
Temperature-responsive	Vinyl pyrrolidone	[31]
Glucose-responsive	Hyaluronic acid	[32]
pH-responsive	Hyaluronic acid	[33]
Swelling-shrinking	Hydrogel	[34]
Water-soluble	Dextrin	[35]