We examined STS's effects on T cells infiltrating HCC and found that STS, compared to a standard diet, reduced tumor growth (Figure 1A-1D), improved prognosis (Figure 1E), increased T cell infiltration (Figure 1F, S1A), and decreased PD1 expression in CD3+ T cells (Figure 1F). Here, PDCD1 is linked to hepatocellular carcinoma.