Many B vitamins are interdependent, and thus it is best to take them in combination, such as through a B-complex or a multiple vitamin containing a B-complex. Certified Kosher.
Solgar Vitamin B6 100 mg Vegetable Capsules - Pack of 100 - Supports Energy
Solgar Vitamin B12 100µg Sublingual Chewable Nuggets, Vegan, 100 Count
Solgar Vitamin B12 100 µg Tablets - Pack of 100
Solgar Vitamin K2 100 µg Vegetable 50 Capsules