Halachaהלכה

Pikuach Nefesh and Non-Kosher Organ Transplants

These sources address whether the prohibition against consuming non-kosher food is overridden when a non-kosher organ transplant is necessary to save a life. The sources establish the principle of Pikuach Nefesh — that nearly all Torah prohibitions yield to the imperative to preserve human life — and examine whether this principle applies to organ transplantation, which is not an act of eating in the conventional sense.

וְחַיּוּ בָהֶם וְלֹא שֶׁיָּמוּתוּ בָהֶם

9 sources · verified

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Source 1 · Tanach
Verified

Devarim – Guarding Your Life

Deuteronomy 4:9

The Torah commands 'only guard yourself and guard your soul greatly' — a foundational verse for the obligation of Pikuach Nefesh, the imperative to preserve human life, which overrides most prohibitions in the Torah.

רַ֡ק הִשָּׁ֣מֶר לְךָ֩ וּשְׁמֹ֨ר נַפְשְׁךָ֜ מְאֹ֗ד פֶּן־תִּשְׁכַּ֨ח אֶת־הַדְּבָרִ֜ים אֲשֶׁר־רָא֣וּ עֵינֶ֗יךָ וּפֶן־יָס֙וּרוּ֙ מִלְּבָ֣בְךָ֔ כֹּ֖ל יְמֵ֣י חַיֶּ֑יךָ וְהוֹדַעְתָּ֥ם לְבָנֶ֖יךָ וְלִבְנֵ֥י בָנֶֽיךָ׃

But take utmost care and watch yourselves scrupulously, so that you do not forget the things that you saw with your own eyes and so that they do not fade from your mind as long as you live. And make them known to your children and to your children’s children:

Source 2 · Chazal
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Talmud Yoma – Pikuach Nefesh Overrides Shabbat

Yoma 85a

The Talmud's central discussion of Pikuach Nefesh: the obligation to violate Shabbat and virtually all other prohibitions to save a life. R. Yehuda in the name of Shmuel derives this from 'v'chai bahem' — 'you shall live by them,' not die by them. This is the classical source for life overriding prohibition.

וּכְבָר הָיָה רַבִּי יִשְׁמָעֵאל וְרַבִּי עֲקִיבָא וְרַבִּי אֶלְעָזָר בֶּן עֲזַרְיָה מְהַלְּכִין בַּדֶּרֶךְ, וְלֵוִי הַסַּדָּר וְרַבִּי יִשְׁמָעֵאל בְּנוֹ שֶׁל רַבִּי אֶלְעָזָר בֶּן עֲזַרְיָה מְהַלְּכִין אַחֲרֵיהֶן. נִשְׁאֲלָה שְׁאֵלָה זוֹ בִּפְנֵיהֶם: מִנַּיִין לְפִקּוּחַ נֶפֶשׁ שֶׁדּוֹחֶה אֶת הַשַּׁבָּת? נַעֲנָה רַבִּי יִשְׁמָעֵאל וְאָמַר: ״אִם בַּמַּחְתֶּרֶת יִמָּצֵא הַגַּנָּב״ — וּמָה זֶה, שֶׁסָּפֵק עַל מָמוֹן בָּא סָפֵק עַל נְפָשׁוֹת בָּא, וּשְׁפִיכוּת דָּמִים מְטַמֵּא אֶת הָאָרֶץ, וְגוֹרֵם לַשְּׁכִינָה שֶׁתִּסְתַּלֵּק מִיִּשְׂרָאֵל, נִיתָּן לְהַצִּילוֹ בְּנַפְשׁוֹ — קַל וָחוֹמֶר לְפִקּוּחַ נֶפֶשׁ שֶׁדּוֹחֶה אֶת הַשַּׁבָּת.

§ The Gemara relates: It once happened that Rabbi Yishmael, and Rabbi Akiva, and Rabbi Elazar ben Azarya were walking on the road, and Levi HaSadar and Rabbi Yishmael, son of Rabbi Elazar ben Azarya, were walking respectfully behind them, since they were younger and did not walk alongside their teachers. This question was asked before them: From where is it derived that saving a life overrides Shabbat? Rabbi Yishmael answered and said that it is stated: “If a thief be found breaking in and be struck so that he dies, there shall be no blood-guiltiness for him” (Exodus 22:1). Now, if this is true for the thief, where there is uncertainty whether he comes to take money or to take lives, and it is known that bloodshed renders the land impure, since it is stated about a murderer: “And you shall not defile the land” (Numbers 35:34), and it causes the Divine Presence to depart from the Jewish people, as the verse continues: “In the midst of which I dwell, for I the Lord dwell in the midst of the children of Israel” (Numbers 35:34), and even so the home owner is permitted to save himself at the cost of the thief’s life, then a fortiori saving a life overrides Shabbat.

Source 3 · Chazal
Verified

Talmud Sanhedrin – Yehareg v'Al Ya'avor

Sanhedrin 74a

The Talmud establishes which three prohibitions (idolatry, sexual immorality, murder) one must die rather than violate, and conversely, that all other Torah prohibitions are overridden by mortal danger. Since eating pig is not in the 'three,' this framework is directly relevant to the transplant question.

אָמַר רַבִּי יוֹחָנָן מִשּׁוּם רַבִּי שִׁמְעוֹן בֶּן יְהוֹצָדָק: נִימְנוּ וְגָמְרוּ בַּעֲלִיַּת בֵּית נַתְּזָה בְּלוֹד, כׇּל עֲבֵירוֹת שֶׁבַּתּוֹרָה אִם אוֹמְרִין לָאָדָם ״עֲבוֹר וְאַל תֵּהָרֵג״ – יַעֲבוֹר וְאַל יֵהָרֵג, חוּץ מֵעֲבוֹדָה זָרָה וְגִילּוּי עֲרָיוֹת וּשְׁפִיכוּת דָּמִים.

§ The Gemara now considers which prohibitions are permitted in times of mortal danger. Rabbi Yoḥanan says in the name of Rabbi Shimon ben Yehotzadak: The Sages who discussed this issue counted the votes of those assembled and concluded in the upper story of the house of Nitza in the city of Lod: With regard to all other transgressions in the Torah, if a person is told: Transgress this prohibition and you will not be killed, he may transgress that prohibition and not be killed, because the preserving of his own life overrides all of the Torah’s prohibitions. This is the halakha concerning all prohibitions except for those of idol worship, forbidden sexual relations, and bloodshed. Concerning those prohibitions, one must allow himself to be killed rather than transgress them.

Source 4 · Rishonim
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Rambam – Hilchot Yesodei HaTorah: Kiddush Hashem and Pikuach Nefesh

Mishneh Torah, Foundations of the Torah 5:1-3

Rambam rules that one must violate any commandment to preserve life except for the three cardinal sins. He frames this as a positive obligation, not merely a permission, to override Torah law when life is at stake — directly applicable to a life-saving medical procedure.

כָּל בֵּית יִשְׂרָאֵל מְצֻוִּין עַל קִדּוּשׁ הַשֵּׁם הַגָּדוֹל הַזֶּה שֶׁנֶּאֱמַר (ויקרא כב לב) "וְנִקְדַּשְׁתִּי בְּתוֹךְ בְּנֵי יִשְׂרָאֵל". וּמֻזְהָרִין שֶׁלֹּא לְחַלְּלוֹ שֶׁנֶּאֱמַר (ויקרא כב לב) "וְלֹא תְחַלְּלוּ אֶת שֵׁם קָדְשִׁי". כֵּיצַד. כְּשֶׁיַּעֲמֹד עוֹבֵד כּוֹכָבִים וְיֶאֱנֹס אֶת יִשְׂרָאֵל לַעֲבֹר עַל אַחַת מִכָּל מִצְוֹת הָאֲמוּרוֹת בַּתּוֹרָה אוֹ יַהַרְגֶּנּוּ יַעֲבֹר וְאַל יֵהָרֵג שֶׁנֶּאֱמַר בַּמִּצְוֹת (ויקרא יח ה) "אֲשֶׁר יַעֲשֶׂה אוֹתָם הָאָדָם וָחַי בָּהֶם". וָחַי בָּהֶם וְלֹא שֶׁיָּמוּת בָּהֶם. וְאִם מֵת וְלֹא עָבַר הֲרֵי זֶה מִתְחַיֵּב בְּנַפְשׁוֹ: בַּמֶּה דְּבָרִים אֲמוּרִים בִּשְׁאָר מִצְוֹת חוּץ מֵעֲבוֹדַת כּוֹכָבִים וְגִלּוּי עֲרָיוֹת וּשְׁפִיכַת דָּמִים. אֲבָל שָׁלֹשׁ עֲבֵרוֹת אֵלּוּ אִם יֹאמַר לוֹ עֲבֹר עַל אַחַת מֵהֶן אוֹ תֵּהָרֵג. יֵהָרֵג וְאַל יַעֲבֹר. בַּמֶּה דְּבָרִים אֲמוּרִים בִּזְמַן שֶׁהָעוֹבֵד כּוֹכָבִים מִתְכַּוֵּן לַהֲנָאַת עַצְמוֹ. כְּגוֹן שֶׁאֲנָסוֹ לִבְנוֹת לוֹ בֵּיתוֹ בְּשַׁבָּת אוֹ לְבַשֵּׁל לוֹ תַּבְשִׁילוֹ. אוֹ אָנַס אִשָּׁה לְבָעֳלָהּ וְכַיּוֹצֵא בָּזֶה. אֲבָל אִם נִתְכַּוֵּן לְהַעֲבִירוֹ עַל הַמִּצְוֹת בִּלְבַד. אִם הָיָה בֵּינוֹ לְבֵין עַצְמוֹ וְאֵין שָׁם עֲשָׂרָה מִיִּשְׂרָאֵל יַעֲבֹר וְאַל יֵהָרֵג. וְאִם אֲנָסוֹ לְהַעֲבִירוֹ בַּעֲשָׂרָה מִיִּשְׂרָאֵל יֵהָרֵג וְאַל יַעֲבֹר. וַאֲפִלּוּ לֹא נִתְכַּוֵּן לְהַעֲבִירוֹ אֶלָּא עַל מִצְוָה מִשְּׁאָר מִצְוֹת בִּלְבַד:

The entire house of Israel are commanded regarding the sanctification of [God's] great name, as [Leviticus 22:32] states: "And I shall be sanctified amidst the children of Israel." Also, they are warned against desecrating [His holy name], as [the above verse] states: "And they shall not desecrate My holy name." What is implied? Should a gentile arise and force a Jew to violate one of the Torah's commandments at the pain of death, he should violate the commandment rather than be killed, because [Leviticus 18:5] states concerning the mitzvot: "which a man will perform and live by them." [They were given so that] one may live by them and not die because of them. If a person dies rather than transgress, he is held accountable for his life. When does the above apply? With regard to other mitzvot, with the exception of the worship of other gods, forbidden sexual relations, and murder. However, with regard to these three sins, if one is ordered: "Transgress one of them or be killed," one should sacrifice his life rather than transgress. When does the above apply? When the gentile desires his own personal benefit - for example, he forces a person to build a house or cook food for him on the Sabbath, he rapes a woman, or the like. However, if his intention is solely to have him violate the mitzvot, [the following rules apply:] If he is alone and there are not ten other Jews present, he should transgress and not sacrifice his life. However, if he forces him [to transgress] with the intention that he violate [a mitzvah] in the presence of ten Jews, he should sacrifice his life and not transgress. [This applies] even if [the gentile] intended merely that he violate only one of the [Torah's] mitzvot.

Source 5 · Rishonim
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Rambam – Hilchot Ma'achalot Asurot: The Prohibition of Non-Kosher Food

Mishneh Torah, Forbidden Foods 14:1

Rambam codifies that the prohibition of non-kosher food applies specifically to eating (akhilah). The transplant of an organ is not an act of eating — raising the halakhic question of whether the prohibition is relevant at all once the material is not consumed in the normal sense.

כָּל אִסּוּרֵי מַאֲכָלוֹת שֶׁבַּתּוֹרָה שִׁעוּרָן בִּכְזַיִת בֵּינוֹנִי בֵּין לְמַלְקוֹת בֵּין לְכָרֵת בֵּין לְמִיתָה בִּידֵי שָׁמַיִם. וּכְבָר בֵּאַרְנוּ שֶׁכָּל הַמְחֻיָּב כָּרֵת אוֹ מִיתָה בִּידֵי שָׁמַיִם עַל מַאֲכָל לוֹקֶה:

The minimum measure for which one is liable for partaking of any of the forbidden foods in the Torah is [the size of] an average olive. [This applies] whether for lashes, kerait, or death at the hand of heaven. We already explained that anyone who is liable for kerait or death at the hand of heaven for [partaking of] forbidden food, should receive lashes.

Source 6 · Acharonim
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Shulchan Arukh – Pikuach Nefesh and Forbidden Foods

Shulchan Arukh, Yoreh De'ah 155:3

The Shulchan Arukh rules that in a case of mortal danger, one may eat forbidden foods to save one's life. While transplantation is not eating, this ruling establishes the general principle that the prohibition of treif yields entirely to life-threatening circumstances.

בשאר איסורים מתרפאים במקום סכנה אפי' דרך הנאתן ושלא במקום סכנה כדרך הנאתן אסור שלא כדרך הנאתן מותר חוץ מכלאי הכרם ובשר בחלב שאסורים אפילו שלא כדרך הנאתן אלא במקום סכנה:

Cette permission n’est pas accordée à une personne légèrement souffrante; toutefois, lorsque le remède a une saveur désagréable on peut le lui faire prendre.

Source 7 · Acharonim
Verified

Tomer Devorah – Imitatio Dei and the Value of Life

Tomer Devorah 1:1

R. Moshe Cordovero opens by teaching that the highest human obligation is to emulate God's mercy and compassion — including the divine attribute of sustaining all life. This Kabbalistic-mussar framework supports the imperative to sustain life by whatever means necessary.

הָאָדָם רָאוּי שֶׁיִּתְדַּמֶּה לְקוֹנוֹ וְאָז יִהְיֶה בְּסוֹד הַצּוּרָה הָעֶלְיוֹנָה צֶלֶם וּדְמוּת, שֶׁאִלּוּ יְדֻמֶּה בְּגוּפוֹ וְלֹא בִּפְעֻלּוֹת הֲרֵי הוּא מַכְזִיב הַצּוּרָה וְיֹאמְרוּ עָלָיו צוּרָה נָאָה וּמַעֲשִׂים כְּעוּרִים. שֶׁהֲרֵי עִיקָר הַצֶּלֶם וְהַדְּמוּת הָעֶלְיוֹן הֵן פְּעֻלּוֹתָיו, וּמַה יוֹעִיל לוֹ הֱיוֹתוֹ כְּצוּרָה הָעֶלְיוֹנָה דְּמוּת תַּבְנִית אֵבָרָיו וּבַפְּעֻלּוֹת לֹא יִתְדַמֶּה לְקוֹנוֹ. לְפִיכָךְ רָאוּי שֶׁיִּתְדַּמֶּה אֶל פְּעֻלּוֹת הַכֶּתֶר שֶׁהֵן י"ג מִדּוֹת שֶׁל רַחֲמִים עֶלְיוֹנוֹת. וּרְמוּזוֹת בְּסוֹד הַפְּסוּקִים (מיכה ז, יח) מִי אֵל כָּמוֹךָ. יָשׁוּב יְרַחֲמֵנוּ.

Chapter 1 - That it is fitting for a person to resemble his Creator: It is fitting for a person to resemble his Creator and then he will be [configured] in the secret of the Highest Form, [both] in image and likeness. As if he is alike in his body but not in his actions, he betrays the Form; and they will say about him, "A lovely form, but ugly deeds." As behold, the essence of the Highest Image and Likeness is His actions. And what will it benefit him to have the structure of his limbs like the Highest Form, but not resemble his Creator in his actions? Therefore it is fitting that he should [make his actions] resemble the actions of the Crown (Keter), which are the thirteen highest traits of mercy.

Source 8 · Hasidic
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Kedushat Levi – The Sanctity of Jewish Life Above All

Kedushat Levi, Genesis, Vayera 1

R. Levi Yitzchak of Berditchev expounds on the supreme value of Jewish life, teaching that a Jew's neshamah (soul) is the primary locus of holiness, and that preserving it overrides virtually all other concerns. His approach reinforces the priority of Pikuach Nefesh from a Chassidic perspective.

והנה האדם העובד להשם יתברך במסירת נפש אז הוא מתפשט מאותיות ומדבק עצמו להשפע אשר עדיין לא נתצמצם באותיות. והנה אברהם אבינו עליו השלום מל עצמו לעת זקנותו והיה עובד הבורא ברוך הוא במסירת נפש ועל ידי זה נתפשט עצמו מן האותיות שלו, כי הוא דבוק בהשפע אשר עדיין לא נתצמצם באותיות ולא נקרא בשמו כלל.

When a human being serves his ‎Creator out of awe, ‎יראה‎, by totally negating the limitations ‎imposed on a soul while it is constricted by the body it inhabits, it ‎may be considered as having “disrobed,” shed the restrictions his ‎body imposed upon the free, upward, heavenward motion of his ‎soul. When we express this concept in terms of the meaning of ‎the letters in our G’d-given names, this means that we have ‎divested ourselves of our “names.” Avraham, at the time of his ‎life that the Torah speaks about here, had not yet freed himself ‎from the limits imposed upon him (by dint of the letters in his ‎name) prior to his having been circumcised.

Source 9 · Modern
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Mishnah Berurah – Obligation to Violate Shabbat for Life

Mishnah Berurah 328:1

The Chafetz Chaim emphasizes that saving a life is not merely permitted but obligatory, and one who hesitates out of excessive piety when a life is at stake is guilty of a transgression. This principle would apply equally to permitting a life-saving transplant from a non-kosher animal.

(א) מיחוש בעלמא והוא מתחזק וכו' - דאם כאיב ליה טובא וחלה כל גופו עי"ז או שנפל למשכב אף שאין בו סכנה מותר לעשות בשבילו רפואה שאין בה מלאכה וכההיא דסימן שכ"ז ס"א וכה"ג וע"י א"י מותר לעשות אפילו מלאכה גמורה וכדלקמן בסי"ז וסל"ז ע"ש: