<SEC-DOCUMENT>0000899243-21-002307.txt : 20210119
<SEC-HEADER>0000899243-21-002307.hdr.sgml : 20210119
<ACCEPTANCE-DATETIME>20210119090036
ACCESSION NUMBER:		0000899243-21-002307
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20210111
FILED AS OF DATE:		20210119
DATE AS OF CHANGE:		20210119

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			AMELIO GILBERT F
		CENTRAL INDEX KEY:			0001183247

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-31791
		FILM NUMBER:		21534106

	MAIL ADDRESS:	
		STREET 1:		5835 STRASBOURG COURT
		STREET 2:		---
		CITY:			RENO
		STATE:			NV
		ZIP:			89511

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			GALECTIN THERAPEUTICS INC
		CENTRAL INDEX KEY:			0001133416
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				043562325
		STATE OF INCORPORATION:			NV
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		4960 PEACHTREE INDUSTRIAL BOULEVARD
		STREET 2:		SUITE 240
		CITY:			NORCROSS
		STATE:			GA
		ZIP:			30071
		BUSINESS PHONE:		678-620-3186

	MAIL ADDRESS:	
		STREET 1:		4960 PEACHTREE INDUSTRIAL BOULEVARD
		STREET 2:		SUITE 240
		CITY:			NORCROSS
		STATE:			GA
		ZIP:			30071

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	PRO PHARMACEUTICALS INC
		DATE OF NAME CHANGE:	20010612
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc4.xml
<DESCRIPTION>FORM 4 SUBMISSION
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2021-01-11</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001133416</issuerCik>
        <issuerName>GALECTIN THERAPEUTICS INC</issuerName>
        <issuerTradingSymbol>GALT</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001183247</rptOwnerCik>
            <rptOwnerName>AMELIO GILBERT F</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O GALECTIN THERAPEUTICS, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>4960 PEACHTREE INDUSTRIAL BLVD., STE 240</rptOwnerStreet2>
            <rptOwnerCity>NORCROSS</rptOwnerCity>
            <rptOwnerState>GA</rptOwnerState>
            <rptOwnerZipCode>30071</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2021-01-11</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>60000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>2.17</value>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>60614</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">The price reported in Column 4 is a weighted average price, rounded to the nearest cent.  The shares were sold in multiple transactions at prices ranging from $2.16 to $2.22 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased by the Reporting Person at each separate price on each date of purchase.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Jack W. Callicutt, by power of attorney</signatureName>
        <signatureDate>2021-01-19</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
