Hello doctor, When I have done my general tests I came to know that my Vitamin B12 and Vitamin D levels are very less. vitamin B12 - 98 vitamin d - 11 I started taking Neurobion Forte - 2 tabs per day Uprise Vitamin D3 60K - once in a week shelcal xt - one tab per day started this course since 2 days only. But I am feeling very tired and so much of giddiness my question - is this giddiness because of low values of vitamin b12 and Vitamin D deficiencies ? as tablets take some time to get affect should I take Vitamin B12 and Vitamin D injections to overcome this giddiness ? if not injections what should I do for this giddiness ? Thank you