Spend time in direct sunlight
Expose arms, legs, or face to sunlight
Go outside during midday when UVB is strongest
Use short, regular sun exposure sessions
Eat fatty fish such as salmon, mackerel, sardines, and tuna
Eat egg yolks
Eat liver
Consume fortified foods such as milk, plant milks, orange juice, and cereals
Eat UV-exposed mushrooms
Include cod liver oil in the diet
Maintain a healthy diet with vitamin D-rich foods
Get blood levels checked if deficiency is a concern