Posted by Neill AbayonA new paper analyses the case for vitamin D’s cancer-fighting power by looking at the well-known Hill criteria for examining causality in a biological system. The Hill criteria look at:
- Strength of association
- Consistency (repeated observation)
- Specificity (one agent, one result)
- Temporality (exposure precedes effect)
- Biological gradient (dose-response relation)
- Plausibility (e.g., mechanisms)
- Coherency (no serious conflict with the generally known facts of the natural history and biology of the disease)
The theory that solar ultraviolet radiation -- and by extension, vitamin D, which is produced when such radiation strikes your skin -- is a potent cancer fighter satisfies most, if not all, of the criteria. From a scientific point of view, therefore, vitamin D reduces the risk of many forms of cancer and increases survival rates once cancer reaches a detectable stage.
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