Vitamin D is abundant in fatty fish including salmon, mackerel, sardines, and trout. Their vitamin D and omega-3s are good.
Traditional crunches target the upper rectus abdominis. Focus on form and prevent neck pulling. For a balanced approach, try bicycle and reverse crunches.
Cod liver oil is a top vitamin D source. Also includes vitamin A and omega-3s.
Vitamin D is added to milk, plant-based milk replacements, orange juice, and morning cereals. Check labels to check whether items are fortified.
Use a cable machine to stimulate your obliques with woodchopper movements. This technique rotates your torso diagonally like an axe swing.
Vitamin D is in egg yolks. However, the quantity depends on the egg-laying hens' nutrition.
When grown in sunshine or UV light, shiitake and maitake mushrooms contain a modest quantity of vitamin D.