For this forum... here is what you should be up on given the possible fallout heading into the atmosphere and around the planet...
Brewer’s Yeast: Believe it or not, brewer’s yeast can help protect and repair damage from many types of radioactivity.
Nutritional Yeast would likely be an equal (or close to it) substitute.
Essential fatty acids: whole fat and oil sources to include vitamins A, D, E, and K
Vitamin C rich foods...
Lemon: Or lemon peel concentrate. Schulze superfood - due to bioflavanoids
Rutin from citrus peels and buckwheat
Kelp, and other Iodine rich sea vegetables goes without saying.
Calcium, Magnesium, selenium, potassium, zinc, and iron rich foods and herbs will help your body to pass off Strontium 90, calcium-45, cesium-137, cesium-134, potassium-40 and potassium-42, zinc-65, americium-241 ... it reduces absorption of some of these by as much as 50%, and helps to chelate other radioactives, including cadmium, aluminum, lead, and excess copper.
Radioactive exposure can severely deplete iron...
Bee Pollen and Bee Propolis help with effects from radium and colbalt-60
Beets - rebuild the blood...
Garlic, Onions, Siberian Ginseng, Pectin, Panax Ginseng, Aloe, Chaparral, Green Tea and Black Tea, Chlorophyll. Nucleic acids: RNA and DNA increase the survival rate of mammals exposed to irradiation... Nutritional or brewers yeast will have the Nuleic acids along with Bee pollen, sea algae such as chlorella; Onions contain RNA.
Schulze superfood formula has MOST of this in it... add other things to your diet as appropriate.
Medicinal Charcoal will absorb and neutralize radioactive substances and some toxic materials.