<SEC-DOCUMENT>0001562180-24-002538.txt : 20240311
<SEC-HEADER>0001562180-24-002538.hdr.sgml : 20240311
<ACCEPTANCE-DATETIME>20240311165702
ACCESSION NUMBER:		0001562180-24-002538
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20240308
FILED AS OF DATE:		20240311
DATE AS OF CHANGE:		20240311

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Yang Patrick Y
		CENTRAL INDEX KEY:			0001309988
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-39941
		FILM NUMBER:		24738902

	MAIL ADDRESS:	
		STREET 1:		C/O GENENTECH INC
		STREET 2:		1 DNA WAY,MS 49,ATTN:K.STRAND OR J.BERRY
		CITY:			SOUTH SAN FRANCISCO
		STATE:			CA
		ZIP:			94080-4990

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Sana Biotechnology, Inc.
		CENTRAL INDEX KEY:			0001770121
		STANDARD INDUSTRIAL CLASSIFICATION:	BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES) [2836]
		ORGANIZATION NAME:           	03 Life Sciences
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		188 EAST BLAINE STREET, SUITE 400
		CITY:			SEATTLE
		STATE:			WA
		ZIP:			98102
		BUSINESS PHONE:		(206) 701-7914

	MAIL ADDRESS:	
		STREET 1:		188 EAST BLAINE STREET, SUITE 400
		CITY:			SEATTLE
		STATE:			WA
		ZIP:			98102
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primarydocument.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0508</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2024-03-08</periodOfReport>

    <notSubjectToSection16>false</notSubjectToSection16>

    <issuer>
        <issuerCik>0001770121</issuerCik>
        <issuerName>Sana Biotechnology, Inc.</issuerName>
        <issuerTradingSymbol>SANA</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001309988</rptOwnerCik>
            <rptOwnerName>Yang Patrick Y</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O SANA BIOTECHNOLOGY, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>188 EAST BLAINE STREET, SUITE 400</rptOwnerStreet2>
            <rptOwnerCity>SEATTLE</rptOwnerCity>
            <rptOwnerState>WA</rptOwnerState>
            <rptOwnerZipCode>98102</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>true</isDirector>
            <isOfficer>false</isOfficer>
            <isTenPercentOwner>false</isTenPercentOwner>
            <isOther>false</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>false</aff10b5One>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2024-03-08</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>false</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>25000.00</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>9.452</value>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>149250.00</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $9.44 to $9.49, inclusive. The reporting person undertakes to provide to Sana Biotechnology, Inc. (the &quot;Company&quot;), any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Julie Shah, Attorney-in-Fact for Patrick Y. Yang</signatureName>
        <signatureDate>2024-03-11</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
