Vitamin B12 deficiency causes can be because as the body ages the stores of B12 gets depleted and there are no vegetarian sources for the same hence it becomes deficient
Vit D3 is deficient because of lack of exposure to sunlight. This is because of new lifestyle.
Next Steps
Do Blood reports to see the levels
Health Tips
Sun exposure for atleast 20 minutes between 11am to 1pm in India is good source for
Vitamin D