The invention relates to a derivative of a GLP-1 analog, which analog comprises a first K residue at a position corresponding to position 27 of GLP-1(7-37) (SEQ ID NO: 1); a second K residue at a position corresponding to position T of GLP-1(7-37), where T is an integer in the range of 7-37 except 18 and 27; and a maximum of ten amino acid changes as compared to GLP-1(7-37); wherein the first K residue is designated K27, and the second K residue is designated KT; which derivative comprises two albumin binding moieties attached to K27 and KT, respectively, via a linker, wherein the albumin binding moiety comprises a protracting moiety selected from HOOC—(CH2)x—CO— and HOOC—C6H4—O—(CH2)y—CO—; in which x is an integer in the range of 6-16, and y is an integer in the range of 3-17; wherein the linker comprises an element of the formula —NH—(CH2)2—(O—(CH2)2)k—O—(CH2)n—CO—, wherein k is an integer in the range of 1-5, and n is an integer in the range of 1-5; or a pharmaceutically acceptable salt, amide, or ester thereof. The invention also relates to the pharmaceutical use thereof, for example in the treatment and/or prevention of all forms of diabetes and related diseases, as well as to corresponding novel GLP-1 analogs. The derivatives are suitable for oral administration.