Yes cod liver oil is among the highest in Vit D as a supplement. Gel caps are great. No taste .

Bowhunter, yes it's a bit strong but steeped in the ACV for a few weeks it really isn't that bad. I think the ACV mellows the bite . It has to.

Big tablespoon once or twice a day , or more if sickness is close around you.Taken regularly, it builds the immune system in a mighty way. The vitamin C content from all the ingredients is mind-blowing, along with many other blood cleaning/building nutrients. As soon as you feel "off", get on it regular and even more. Amazingly, when you have a sore throat , I'd swear taking that would burn like heck going down, but it doesn't ! It actually feels soothing, believe it or not !

Amazing stuff, used around the world for generations. Kicks pathogens to the curb....or lessens the symptoms and healing time greatly if taken late.

You'll survive !

Depends on what you mean by regular diet.

http://www.nofructose.com/introduction/nutritional-model-of-modern-disease-2/