Absolutely, D3 is necessary. I take it every day too. Have it in capsule form and recently bought a bottle of Carlson’s Norwegian cod liver oil to get me through the winter.
My pharmacist friend and I also make Dr. Axe’s Detox Drink using Bragg’s Raw. Unfiltered Apple Cider Vinegar, available everywhere, even Walmart. Use the Unpasteurized version with “the mother,” a sort of cloudy looking vinegar.
https://draxe.com/recipes/secret-detox-drink/
Going to be a very cold winter here. Darn that global warming.
My husband makes something like that with Bragg’s, lemon juice, electrolyte powder, sea salt and stevia. Comes out tasting like lemonade and is apparently very good if you’re doing the Keto- low-carb thing.