Property and equipment

12 Months Ended

Dec. 31, 2022

Property and equipment

Property and equipment

4. Property and equipment

Property and equipment consist of the following:

	December 31,
	2022		2021
Lab equipment	$	40,133	$	90,770
Furniture & Fixtures		—		31,152
Computer equipment		5,258		18,955
Property and equipment, at cost		45,391		140,877
Less accumulated depreciation and amortization		(43,070)		(117,007)
Property and equipment—net	$	2,321	$	23,870

Depreciation expense for years ended December 31, 2022, 2021 and 2020 was $4,403, $12,829, $28,834, respectively.