Hi The dose doctor can tell you much better ..as I am a dietician I want to tell you if you keep your diet healthy and balanced then you will never get deficiency of vitamin B complex. Few Vitamin B rich foods are as follow 1. Salmon, 2. Leafy Greens, 3. Liver and Other Organ Meats, 4. Eggs, 5. Milk, 6. Beef, 8. Legumes, 9. Whole grains 9. Chicken and Turkey 10. Yogurt. 11. Low-fat milk. 12. Fortified plant-based milk. 13. Cheese. And you can See these  are very normal common food if you include them in your diet  then you will be able to cover your vitamin B requirement. If you need assistance from me how to eat a healthy balanced diet can you can meet me for a consultation. During this pandemic I will be doing a consultation  through Skype or zoom... it will be 45 minutes to 50 minute  session in which I will be explaining according to yours schedule and what diet you should follow to be healthy whole life. If you want to contact me then you can call on WhatsApp at the number mentioned on my Practo profile or for a personal chat option. If you wanna get more educated about diet, health, nutrition than you can follow me on Instagram. My Instagram handle name is @dietitianVidhi....

Have it after food.