Creatine:sodium symporter which mediates the uptake of creatine (PubMed:17465020, PubMed:22644605, PubMed:25861866, PubMed:7945388, PubMed:7953292, PubMed:9882430). Plays an important role in supplying creatine to the brain via the blood-brain barrier (By similarity). {ECO:0000250|UniProtKB:Q8VBW1, ECO:0000269|PubMed:17465020, ECO:0000269|PubMed:22644605, ECO:0000269|PubMed:25861866, ECO:0000269|PubMed:7945388, ECO:0000269|PubMed:7953292, ECO:0000269|PubMed:9882430}. This is the function of Ensembl gene identifier ENSG00000130821 (SLC6A8, solute carrier family 6 member 8).