<SEC-DOCUMENT>0001752724-23-276836-index.html : 20231212
<SEC-HEADER>0001752724-23-276836.hdr.sgml : 20231212
<ACCEPTANCE-DATETIME>20231212105732
ACCESSION NUMBER:		0001752724-23-276836
CONFORMED SUBMISSION TYPE:	N-CEN
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20230930
FILED AS OF DATE:		20231212
DATE AS OF CHANGE:		20231212
EFFECTIVENESS DATE:		20231212

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			abrdn Life Sciences Investors
		CENTRAL INDEX KEY:			0000884121
		IRS NUMBER:				043147016
		STATE OF INCORPORATION:			PA
		FISCAL YEAR END:			0930

	FILING VALUES:
		FORM TYPE:		N-CEN
		SEC ACT:		1940 Act
		SEC FILE NUMBER:	811-06565
		FILM NUMBER:		231480328

	BUSINESS ADDRESS:	
		STREET 1:		1900 MARKET STREET
		STREET 2:		SUITE 200
		CITY:			PHILADELPHIA
		STATE:			PA
		ZIP:			19103
		BUSINESS PHONE:		6177728515

	MAIL ADDRESS:	
		STREET 1:		1900 MARKET STREET
		STREET 2:		SUITE 200
		CITY:			PHILADELPHIA
		STATE:			PA
		ZIP:			19103

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	TEKLA LIFE SCIENCES INVESTORS
		DATE OF NAME CHANGE:	20141015

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	H&Q LIFE SCIENCES INVESTORS
		DATE OF NAME CHANGE:	19920929
</SEC-HEADER>
<DOCUMENT>
<TYPE>N-CEN
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
Document 1 - file: primary_doc.html

Document 1 - RAW XML: primary_doc.xml

</DOCUMENT>
<DOCUMENT>
<TYPE>INTERNAL CONTROL RPT
<SEQUENCE>2
<FILENAME>NCEN_811-06565_15997308_0923.htm
<TEXT>
Document 2 - file: NCEN_811-06565_15997308_0923.htm

</DOCUMENT>
</SEC-DOCUMENT>