Some of us live in places where it is impossible to absorb any UV light from the sun for at least six months of the year. Yes I eat oily fish etc. but I absolutely need supplements because I am not genetically adapted to live at such a high latitude.
"...some of us live in places where it is impossible to absorb any UV light from the sun..."😐🤔🤨
Unless you live underground, that's not true. Especially in the cold regions (above the 54th parallel).
You literally have an inbuilt system in your body specifically evolved to allow you to absorb MORE ultra violet light, and retain it for longer, the leptinmelanocortin pathway, activated by pro-opiomelanocortin (POMC).
In other words it makes you more sensitive to making your own vitamin d internally.🤔
But if you ingest vitD supps, you tell your body not to make it (because it likes to keep things balanced) and then that signals your body to downregulate your leptinmelanocortin pathway, meaning ultimately, the body may no longer be able to switch it back on in response to environmental sensors (mitochondria), after long term use.
Plus, just like HDL and LDL are simply markers for cholesterol being moved around your body, serum vitD levels are merely an indicator of how it is being transported. Not necessarily how much you have, or how well your body is using it, in the right places.
Some of us live in places where it is impossible to absorb any UV light from the sun for at least six months of the year. Yes I eat oily fish etc. but I absolutely need supplements because I am not genetically adapted to live at such a high latitude.
"...some of us live in places where it is impossible to absorb any UV light from the sun..."😐🤔🤨
Unless you live underground, that's not true. Especially in the cold regions (above the 54th parallel).
You literally have an inbuilt system in your body specifically evolved to allow you to absorb MORE ultra violet light, and retain it for longer, the leptinmelanocortin pathway, activated by pro-opiomelanocortin (POMC).
In other words it makes you more sensitive to making your own vitamin d internally.🤔
But if you ingest vitD supps, you tell your body not to make it (because it likes to keep things balanced) and then that signals your body to downregulate your leptinmelanocortin pathway, meaning ultimately, the body may no longer be able to switch it back on in response to environmental sensors (mitochondria), after long term use.
Plus, just like HDL and LDL are simply markers for cholesterol being moved around your body, serum vitD levels are merely an indicator of how it is being transported. Not necessarily how much you have, or how well your body is using it, in the right places.