Loh formally entered politics during the 2011 general election when she contested as a SPP candidate in Potong Pasir SMC.
During the 2015 general election, Loh contested under the SPP banner in Potong Pasir SMC, but lost to the PAP's Sitoh Yih Pin again, garnering 33.61% of the vote against Sitoh's 66.39%.
Loh's electoral result in Potong Pasir SMC was lower than that of the opposition candidates so she was not offered a NCMP seat in the 13th Parliament.
[5] Loh remains a member of the SPP's central executive committee after stepping down as its chairwoman in 2019.
[8] Loh came from a Hakka Chinese family in Sungai Besi, a suburb of the Malaysian capital Kuala Lumpur.