Iron, folic acid, and vitamin B-12-rich meals aid in the maintenance of hemoglobin levels.
Seafood, meat, dairy products, eggs, spirulina, fortified morning cereals, and some vegetables are the best sources of vitamin B12.
Incorporate extra fruits, vegetables, nuts, seeds, legumes, lean meats, poultry, fish, whole grains, and dairy into your regular diet to boost your hemoglobin levels.
Cruciferous vegetables such as broccoli, cauliflower, cabbage, and kale are high in Hemoglobin and Vitamin B12. Lean meat, fish, dairy products, and eggs all contain vitamin B12.
Deficits in vitamin B12 can lead to depression, memory loss, a weakened immune system, and other serious neurological problems.
Source :
https://www.quora.com