    <SEC-DOCUMENT>0001615219-17-000016-index.html : 20170223
    <SEC-HEADER>0001615219-17-000016.hdr.sgml : 20170223
    <ACCEPTANCE-DATETIME>20170223084238
    ACCESSION NUMBER:		0001615219-17-000016
    CONFORMED SUBMISSION TYPE:	8-K
    PUBLIC DOCUMENT COUNT:		3
    CONFORMED PERIOD OF REPORT:	20170223
    ITEM INFORMATION:		Regulation FD Disclosure
    ITEM INFORMATION:		Financial Statements and Exhibits
    FILED AS OF DATE:		20170223
    DATE AS OF CHANGE:		20170223

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			Flex Pharma, Inc.
    		CENTRAL INDEX KEY:			0001615219
    		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
    		IRS NUMBER:				465087339
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		8-K
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-36812
    		FILM NUMBER:		17630835

    	BUSINESS ADDRESS:
    		STREET 1:		800 BOYLSTON STREET
    		STREET 2:		24TH FLOOR
    		CITY:			BOSTON
    		STATE:			MA
    		ZIP:			02199
    		BUSINESS PHONE:		617-874-1821

    	MAIL ADDRESS:
    		STREET 1:		800 BOYLSTON STREET
    		STREET 2:		24TH FLOOR
    		CITY:			BOSTON
    		STATE:			MA
    		ZIP:			02199
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>8-K
    <SEQUENCE>1
    <FILENAME>a20170222form8-k.htm
    <DESCRIPTION>8-K
    <TEXT>
    Document 1 - file: a20170222form8-k.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.1
    <SEQUENCE>2
    <FILENAME>actrimsposter2017final.htm
    <DESCRIPTION>EXHIBIT 99.1
    <TEXT>
    Document 2 - file: actrimsposter2017final.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>actrimsposter2017final001.jpg
    <TEXT>
    Document 3 - file: actrimsposter2017final001.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>