sˌʌm kˌiːmoʊlˈɪθətɹˌɑːfz jˈuːs ɹᵻdˈɑːks hˈæfɹɪˈækʃənz wɪð lˈoʊ ɹᵻdˈʌkʃən pətˈɛnʃəlz fɔːɹ ðɛɹ mətˈæbəlˌɪzəmz, mˈiːnɪŋ ðæt ðeɪ duːnˌɑːt hˈɑːɹvɪst ɐ lˈɑːt ʌv ˈɛnɚdʒi kəmpˈɛɹd tʊ ˈɔːɹɡənˌɪzəmz ðæt jˈuːs ɔːɹɡˌænoʊtɹˈoʊfɪk pˈæθweɪz.
Some chemolithotrophs use redox half-reactions with low reduction potentials for their metabolisms, meaning that they do not harvest a lot of energy compared to organisms that use organotrophic pathways.