The Claim
In a Vietnamese population, dietary selenium intake exhibits a U-shaped association with cancer risk, where both low intake (27.8–77.2 µg/day) and high intake (169.1–331.7 µg/day) are associated with increased cancer risk compared to a safe range of 110.8–124.4 µg/day, with the lowest intake linked to a 3.78-fold higher odds of cancer and the highest intake linked to a 1.86-fold higher odds.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
In Vietnamese people, consuming too little or too much selenium from food is linked to a higher chance of developing cancer, with the lowest risk occurring at an intake of 110.8 to 124.4 micrograms per day.
See the scientific wording
In a Vietnamese population, dietary selenium intake exhibits a U-shaped association with cancer risk, where both low intake (27.8–77.2 µg/day) and high intake (169.1–331.7 µg/day) are associated with increased cancer risk compared to a safe range of 110.8–124.4 µg/day, with the lowest intake linked to a 3.78-fold higher odds of cancer and the highest intake linked to a 1.86-fold higher odds.
When selenium is too low, the body cannot make enough protective enzymes that clean up harmful molecules, so DNA gets damaged and cells turn cancerous. When selenium is too high, those same enzymes become overloaded and start producing more harmful molecules instead, which also damages DNA and causes cancer.
What the research says
1 studyStudy: A U-shaped association between selenium intake and cancer risk
This study found that Vietnamese people who ate too little or too much selenium were more likely to get cancer, but those who ate just the right amount (around 118 micrograms per day) had the lowest risk.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.