For example, people who live Boston, USA and Edmonton, Canada struggle to make any vitamin D from sunlight between the months of November and February (13Trusted Source).
People in Norway cannot make vitamin D from sunlight between October and March (14Trusted Source).
During this time of year, it’s important that they get their vitamin D from foods and supplements instead.
For example, people who live Boston, USA and Edmonton, Canada struggle to make any vitamin D from sunlight between the months of November and February (13Trusted Source).
People in Norway cannot make vitamin D from sunlight between October and March (14Trusted Source).
During this time of year, it’s important that they get their vitamin D from foods and supplements instead.
人冬天遮盖太严。
这么说半个美国全部加拿大都危险啊
旧金山，DC 貌似都不够。
https://www.health.harvard.edu/staying-healthy/time-for-more-vitamin-d
洞主常说的大金国是指西方，西方属金，地理位置加上今年天文的特点，阳光更不易帮助维生素D?