POWER OF ATTORNEY

Know all by these presents, that the undersigned hereby constitutes and appoints
each of Carlos Ramirez, Terren O'Connor, Michelle L. Hunt and Albert Gelin of
Cooley LLP, and Kenneth Song and Jeff Woodley of RayzeBio, Inc. (the "Company"),
signing individually, the undersigned's true and lawful attorney-in fact and
agent to:

(1) Prepare, execute in the undersigned's name and on the undersigned's behalf,
and submit to the Securities and Exchange Commission (the "SEC"), a Form ID and
Forms 3, 4 and 5 (including amendments thereto and joint filing agreements in
connection therewith) in accordance with Section 16 of the Securities Exchange
Act of 1934, as amended (the "Exchange Act"), and the rules thereunder, in the
undersigned's capacity as an officer, director or beneficial owner of more than
10% of a registered class of securities of the Company;

(2) Do and perform any and all acts for and on behalf of the undersigned that
may be necessary or desirable to complete and execute such Form ID and Forms 3,
4 or 5 (including amendments thereto and joint filing agreements in connection
therewith),  and file such forms or amendments with the SEC and any stock
exchange, self-regulatory association or any similar authority; and

(3) Take any other action of any nature whatsoever in connection with the
foregoing which, in the opinion of such attorney-in-fact, may be of benefit, in
the best interest of, or legally required by, the undersigned, it being
understood that the documents executed by such attorney-in-fact on behalf of the
undersigned pursuant to this Power of Attorney shall be in such form and shall
contain such terms and conditions as such attorney-in-fact may approve in such
attorney-in-facts discretion.

The undersigned hereby grants to each such attorney-in-fact full power and
authority to do and perform any and every act and thing whatsoever requisite,
necessary, or proper to be done in the exercise of any of the rights and powers
herein granted, as fully to all intents and purposes as the undersigned might or
could do if personally present, with full power of substitution or revocation,
hereby ratifying and confirming all that such attorney-in-fact, or such
attorney-in-facts substitute or substitutes, shall lawfully do or cause to be
done by virtue of this power of attorney and the rights and powers herein
granted.  The undersigned acknowledges that each of the foregoing
attorneys-in-fact, in serving in such capacity at the request of the
undersigned, is not assuming, nor is the Company assuming, any of the
undersigned's responsibilities to comply with Section 16 of the Exchange Act.

This Power of Attorney shall remain in full force and effect until the earliest
to occur of (a) the undersigned is no longer required to file Forms 3, 4 and 5
with respect to the undersigned's holdings of and transactions in securities
issued by the Company, (b) revocation by the undersigned in a signed writing
delivered to the foregoing attorney-in-fact or (c) as to any attorney-in-fact
individually, until such attorney-in-fact is no longer employed by the Company
or employed by or a partner at Cooley LLP or another law firm representing the
Company, as applicable.

IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be
executed as of this 1st day of September, 2023.


/s/ Mary Tagliaferri, M.D.