Highest showed no clear difference in rectal cancer risk (9 studies) compared with lowest green tea exposure (low certainty).
It is very uncertain whether highest changes lung cancer risk (17 studies) compared with lowest green tea exposure (very low certainty).
It is very uncertain whether highest changes breast cancer risk (14 studies) compared with lowest green tea exposure (very low certainty).
Highest may leads to lower gynaecological cancer risk (10 studies) compared with lowest green tea exposure (low certainty).
Highest may leads to lower endometrial cancer risk (5 studies) compared with lowest green tea exposure (low certainty).
Highest may leads to lower ovarian cancer risk (5 studies) compared with lowest green tea exposure (low certainty).
It is very uncertain whether highest changes prostate cancer risk (13 studies) compared with lowest green tea exposure (very low certainty).
It is very uncertain whether highest changes urinary tract cancer risk (7 studies) compared with lowest green tea exposure (very low certainty).
Highest showed no clear difference in any cancer incidence (3 studies) compared with lowest green tea exposure (low certainty).
Highest showed no clear difference in any cancer mortality (8 studies) compared with lowest green tea exposure (low certainty).
Highest may leads to lower oral cancer risk (5 studies) compared with lowest green tea exposure (low certainty).
Highest showed no clear difference in any gut cancer risk (7 studies) compared with lowest green tea exposure (low certainty).
It is very uncertain whether highest changes oesophageal cancer risk (13 studies) compared with lowest green tea exposure (very low certainty).
Highest showed no clear difference in any cancer risk No. of participants: 19,475 (3 RCTs) compared with lowest selenium exposure (high certainty).
It is very uncertain whether highest changes cancer mortality risk No. of participants: 183,863 (7 observational… compared with lowest selenium exposure (very low certainty).
It is very uncertain whether highest changes colorectal cancer risk No. of participants: 712,746 (6 observational… compared with lowest selenium exposure (very low certainty).
It is very uncertain whether highest changes lung cancer risk No. of participants: 371,067 (11 observational… compared with lowest selenium exposure (very low certainty).
It is very uncertain whether highest changes breast cancer risk (women) No. of participants: 169,028 (8… compared with lowest selenium exposure (very low certainty).
It is very uncertain whether highest changes bladder cancer risk No. of participants: 279,100 (5 observational… compared with lowest selenium exposure (very low certainty).
It is very uncertain whether highest changes prostate cancer risk No. of participants: 576,667 (21 observational… compared with lowest selenium exposure (very low certainty).