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        <link:linkbaseRef xlink:type="simple" xlink:href="rgbp-20260331_lab.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:title="Label Links" />
        <link:linkbaseRef xlink:type="simple" xlink:href="rgbp-20260331_cal.xml" xlink:role="http://www.xbrl.org/2003/role/calculationLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:title="Calculation Links" />
        <link:linkbaseRef xlink:type="simple" xlink:href="rgbp-20260331_def.xml" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:title="Definition Links" />
      </appinfo>
    </annotation>
    <import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd" />
    <import namespace="http://www.xbrl.org/2003/linkbase" schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" />
    <import namespace="http://xbrl.sec.gov/dei/2026" schemaLocation="https://xbrl.sec.gov/dei/2026/dei-2026.xsd" />
    <import namespace="http://fasb.org/us-gaap/2026" schemaLocation="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd" />
    <import namespace="http://fasb.org/us-types/2026" schemaLocation="https://xbrl.fasb.org/us-gaap/2026/elts/us-types-2026.xsd" />
    <import namespace="http://www.xbrl.org/dtr/type/2024-01-31" schemaLocation="https://www.xbrl.org/dtr/type/2024-01-31/types.xsd" />
    <import namespace="http://xbrl.sec.gov/country/2026" schemaLocation="https://xbrl.sec.gov/country/2026/country-2026.xsd" />
    <import namespace="http://fasb.org/srt/2026" schemaLocation="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd" />
    <import namespace="http://fasb.org/srt-types/2026" schemaLocation="https://xbrl.fasb.org/srt/2026/elts/srt-types-2026.xsd" />
    <element id="RGBP_SeriesAAPreferredStockMember" name="SeriesAAPreferredStockMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="RGBP_SeriesMPreferredStockMember" name="SeriesMPreferredStockMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="RGBP_SeriesNCPreferredStockMember" name="SeriesNCPreferredStockMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="RGBP_PreferredStockSeriesNCMember" name="PreferredStockSeriesNCMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="RGBP_MeasurementInputExpectedVolatilityMember" name="MeasurementInputExpectedVolatilityMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="RGBP_BostoniaMember" name="BostoniaMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="RGBP_CoventryEnterprisesLLCMember" name="CoventryEnterprisesLLCMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="RGBP_TrilliumPratnersLPMember" name="TrilliumPratnersLPMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="RGBP_DueAndPayableOnMayThreeTwoThousandTwentyFiveMember" name="DueAndPayableOnMayThreeTwoThousandTwentyFiveMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="RGBP_DueAndPayableOnJuneFiveTwoThousandTwentyFiveMember" name="DueAndPayableOnJuneFiveTwoThousandTwentyFiveMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="RGBP_DueAndPayableOnOctoberFourTwoThousandTwentyFiveMember" name="DueAndPayableOnOctoberFourTwoThousandTwentyFiveMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="RGBP_DueAndPayableOnOctoberFifteenTwoThousandTwentyFiveMember" name="DueAndPayableOnOctoberFifteenTwoThousandTwentyFiveMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="RGBP_DueAndPayableOnOctoberTwentyThreeTwoThousandTwentyFiveMember" name="DueAndPayableOnOctoberTwentyThreeTwoThousandTwentyFiveMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="RGBP_DavidKoosMember" name="DavidKoosMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="RGBP_BSTPartnersMember" name="BSTPartnersMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="RGBP_ZanderTherapeuticsIncMember" name="ZanderTherapeuticsIncMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="RGBP_LenderOneMember" name="LenderOneMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="RGBP_LenderTwoMember" name="LenderTwoMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="RGBP_LenderThreeMember" name="LenderThreeMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="RGBP_LenderFourMember" name="LenderFourMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="RGBP_LenderFiveMember" name="LenderFiveMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="RGBP_LenderSixMember" name="LenderSixMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="RGBP_LenderSevenMember" name="LenderSevenMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="RGBP_LenderEightMember" name="LenderEightMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="RGBP_LenderNineMember" name="LenderNineMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="RGBP_MayFiveTwoThousandSeventeenMember" name="MayFiveTwoThousandSeventeenMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="RGBP_MarchEightTwoThousandSixteenMember" name="MarchEightTwoThousandSixteenMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="RGBP_AprilSixTwoThousandSixteenMember" name="AprilSixTwoThousandSixteenMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="RGBP_DecemberTwentyTwoThousandSeventeenMember" name="DecemberTwentyTwoThousandSeventeenMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="RGBP_OctoberThirtyOneTwoThousandSixteenMember" name="OctoberThirtyOneTwoThousandSixteenMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="RGBP_EffectiveSeptemberFourTwoThousandTwentyFourMember" name="EffectiveSeptemberFourTwoThousandTwentyFourMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="RGBP_GuarantedInterestMember" name="GuarantedInterestMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="RGBP_OctoberTwentyEightTwoThousandTwentyFourMember" name="OctoberTwentyEightTwoThousandTwentyFourMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="RGBP_RegenBiopharmaIncMember" name="RegenBiopharmaIncMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="RGBP_LabrysFundIILPMember" name="LabrysFundIILPMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="RGBP_ConvertibleNotePayableCurrent" name="ConvertibleNotePayableCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="RGBP_RentalExpense" name="RentalExpense" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="RGBP_FinancingFees" name="FinancingFees" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="RGBP_StockIssuedDuringPeriodValueCommonSharesIssuedForInterest" name="StockIssuedDuringPeriodValueCommonSharesIssuedForInterest" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="RGBP_StockIssuedDuringPeriodSharesCommonSharesIssuedForInterest" name="StockIssuedDuringPeriodSharesCommonSharesIssuedForInterest" nillable="true" xbrli:periodType="duration" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="RGBP_StockIssuedDuringPeriodValueRestrictedStockAwardNonemployee" name="StockIssuedDuringPeriodValueRestrictedStockAwardNonemployee" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="RGBP_StockIssuedDuringPeriodSharesRestrictedStockAwardNonemployee" name="StockIssuedDuringPeriodSharesRestrictedStockAwardNonemployee" nillable="true" xbrli:periodType="duration" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="RGBP_StockIssuedDuringPeriodValueStockDividends" name="StockIssuedDuringPeriodValueStockDividends" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="RGBP_StockIssuedDuringPeriodSharesStockDividends" name="StockIssuedDuringPeriodSharesStockDividends" nillable="true" xbrli:periodType="duration" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="RGBP_CommonStockIssuedForCompensation" name="CommonStockIssuedForCompensation" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="RGBP_IncreaseDecreaseInCommonStockIssuedForExpenses" name="IncreaseDecreaseInCommonStockIssuedForExpenses" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="RGBP_BorrowingsFromNotesPayableToRelatedParties" name="BorrowingsFromNotesPayableToRelatedParties" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="RGBP_CommonSharesIssuedForNotePayable" name="CommonSharesIssuedForNotePayable" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="RGBP_ConvesionOfNotesPaybleToConvertibleDebt" name="ConvesionOfNotesPaybleToConvertibleDebt" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="RGBP_CommonSharesIssuedForInterest" name="CommonSharesIssuedForInterest" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="RGBP_DisclosurePrepaidExpensesAbstract" name="DisclosurePrepaidExpensesAbstract" abstract="true" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
    <element id="RGBP_PrepaidExpensesDisclosureTextBlock" name="PrepaidExpensesDisclosureTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="RGBP_DisclosureUnearnedIncomeAbstract" name="DisclosureUnearnedIncomeAbstract" abstract="true" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
    <element id="RGBP_UnearnedIncomeDisclosureTextBlock" name="UnearnedIncomeDisclosureTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="RGBP_ReverseStockSplitPolicyTextBlock" name="ReverseStockSplitPolicyTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="RGBP_OperatingLossCarryForwardValuationAllowancePercentage" name="OperatingLossCarryForwardValuationAllowancePercentage" nillable="true" xbrli:periodType="duration" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" />
    <element id="RGBP_AccruedInterest" name="AccruedInterest" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="RGBP_AccruedPayroll" name="AccruedPayroll" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="RGBP_DisclosureUnearnedIncomeTable" name="DisclosureUnearnedIncomeTable" abstract="true" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" />
    <element id="RGBP_CashPrepaid" name="CashPrepaid" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="RGBP_AmortizationOfNotes" name="AmortizationOfNotes" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="RGBP_DebtDisclosureTable" name="DebtDisclosureTable" abstract="true" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" />
    <element id="RGBP_RelatedPartyTransactionsTable" name="RelatedPartyTransactionsTable" abstract="true" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" />
    <element id="RGBP_CashIssuedForConvertibleNote" name="CashIssuedForConvertibleNote" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="RGBP_DebtInstrumentDefaultDescription" name="DebtInstrumentDefaultDescription" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
    <element id="RGBP_DebtInstrumentOriginalDiscount" name="DebtInstrumentOriginalDiscount" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="RGBP_NonCumulativePreferredStockCashDividendsPerShare" name="NonCumulativePreferredStockCashDividendsPerShare" nillable="true" xbrli:periodType="instant" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" />
</schema>
