Vitamin D as in DUH. What do they tell ya. Stay out of the sun or you will get skin cancer. What really happens? Stay out of the sun and get everything else.
You need about 10 minutes/day if you are low on melanin.
I think people that consume the ideal amount of sodium and potassium have better skin and can stay in the sun.
Get a least a half hour of sun on bare arms every day in the summer and take D3 supplements through the rest of the year and avoid flu shots. You won’t need them.