The most important vitamin of all, should you neglect or forget all the others, is Vitamin C.
The best way to get Vitamin C into your blood stream, is through liposomes. "Liposomal" Vitamin C, credited with reversing very serious illnesses, mimics the action of intravenous high dose vitamin C. By contrast, vitamin C tablets lose much of their potency--up to 80%-- before they enter the body.
Now there is a video that shows you how to simply and cheaply make your own liposomal vitamin C solution at home. This may be the best small investment you can make for your health in the uncertain times ahead.