Be careful with multivitamins. Some of them are poorly absorbed and have low bioavailability. Each brand of vitamins may have different potency, purity and bioavailability.
Here are some supplements I highly recommend:
Vitamin D3 4000 units/day by Solar Carlson, taken with an additional K2 supplement. D3 taking with K2 insures calcium absorption to your bones. Also, K2 has a range of other health benefits.
Get your D3 from the sun. On average you need 20 min a day during the summer and longer in winter.
Good sources of D3 in food are cod liver or cod liver oil, oily fish (Salmon), butter from pasture raised and fed cows; pasture raised and fed poultry, meat; eggs, and mushrooms.
If you are unsure about whether you need to take a D3 supplement, ask your doctor to check your blood for D3 biomarker (optimum health at 50 to 80 ng/mL). Take your D3 in the morning or before 4pm.
Methyl B12 (methylcobalamin) is an active form of vitamin B12. After 50 the ability to absorb B12 is limited. B12 helps to regulate the formation of red blood cells, helps your body use iron, supports mental clarity and healthy mood, and improves melatonin production for a good nights sleep. B12 should be taken during the day.
Krill oil or Green Pasture Blue Ice Fermented Cod liver oil are the best sources of Omega-3 fats.
Organic First Cold Pressed (Extra-virgin) Olive Oil made of same type of olives and is excellent supplement for your heart and stomach.