<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4/A</documentType>

    <periodOfReport>2020-04-01</periodOfReport>

    <dateOfOriginalSubmission>2020-04-02</dateOfOriginalSubmission>

    <issuer>
        <issuerCik>0000787253</issuerCik>
        <issuerName>NATURAL ALTERNATIVES INTERNATIONAL INC</issuerName>
        <issuerTradingSymbol>NAII</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001063480</rptOwnerCik>
            <rptOwnerName>DAVIS JOE E</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>1535 FARADAY AVENUE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>CARLSBAD</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>92008</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2020-04-17</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>15000</value>
                    <footnoteId id="F2"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>95296</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">This Amendment reflects the cancellation of a previously disclosed grant of restricted stock pursuant to the Issuer's 2019 Omnibus Incentive Plan. The proposed grant was cancelled prior to the shares being issued because the 2019 Omnibus Incentive Plan did not become effective.</footnote>
        <footnote id="F2">Represents the cancellation of a previously reported grant of these many shares. The proposed grant was cancelled prior to the shares being issued.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Joe E. Davis By Kenneth E. Wolf Attorney in Fact</signatureName>
        <signatureDate>2020-04-25</signatureDate>
    </ownerSignature>
</ownershipDocument>
