Hi Holly – Thanks for the question. According to the South Beach Diet’s website all of their foods meet the sodium requirements from the American Heart Association. Here’s some info from their FAQs page: Question: “Are the South Beach Diet foods high in sodium? No. All the South Beach Diet® prepared foods meet the American Heart Association’s recommendation of 600mg or less of sodium in each meal, with many options coming in well under that amount. You can view sodium content and other nutrition information for each food item in the menu section.” Hope that helps!
DASH was first introduced at a meeting of the American Heart Association in 1996 and later published in the New England Journal of Medicine in 1997.  The DASH trial randomly assigned 456 people to different diets to test the effects of dietary patterns on lowering blood pressure. The authors surmised that eating a diet with many different foods with blood pressure-lowering nutrients would show a greater effect on blood pressure than eating single nutrients, such as found in supplements or in a limited diet. Three diets were tested: 1) a control diet, or a standard American diet, 2) a fruits and vegetables diet, similar to the control diet but providing more fruits and vegetables and less snacks and sweets, and 3) a combination diet rich in fruits, vegetables, nuts, and low-fat dairy foods with reduced amounts of saturated fat, total fat, and cholesterol. The last two diets were richer in nutrients associated with lower blood pressure, such as potassium, magnesium, calcium, fiber, and protein. All three diets provided about 3000 mg sodium, which is more than the recommended amount from the Dietary Guidelines for Americans but less than the average sodium intake for Americans. 
The South Beach Diet says that it'll teach you about eliminating so-called "bad" carbs from your diet. It uses the glycemic index and glycemic load to determine which carbs you should avoid. Foods with a high glycemic index tend to increase your blood sugar faster, higher and longer than do foods with a lower index. Some evidence suggests that this increase in blood sugar can boost your appetite, leading to increased eating and weight gain and possibly diabetes, which can all contribute to cardiovascular disease.
With intermittent fasting, you narrow the size of your eating window, or you occasionally do fasts of 24 hours. For instance, you can start eating at noon and finish up by 8pm, essentially skipping breakfast. I wrote all about it in our “Beginner’s Guide to Intermittent Fasting,” where I outlined the benefits of teaching your body to consume food more efficiently, and also reduces the total number of calories you are probably eating.
Santa Clarita Diet is an American horror-comedy web television series created by Victor Fresco for the streaming service Netflix, starring Drew Barrymore and Timothy Olyphant. Fresco serves as the showrunner, and is an executive producer alongside Drew Barrymore, Timothy Olyphant, Aaron Kaplan, Tracy Katsky, Chris Miller, Ember Truesdell and Ruben Fleischer.