Considering the following information:
The more fat stores available, the longer a person can typically survive during starvation. Once the fat stores have been completely metabolized, the body then reverts back to muscle breakdown for energy, since it’s the only remaining fuel source in the body. - https://www.healthline.com/health/food-nutrition/how-long-can-you-live-without-food.
Pure fat has a very high energy content, or about 9 calories per gram. - https://www.healthline.com/nutrition/calories-in-a-pound-of-fat.
As a general rule, people need a minimum of 1,200 calories daily to stay healthy. - https://www.everydayhealth.com/weight/can-more-calories-equal-more-weight-loss.aspx.
Would a person with higher body fat survive longer without food compared to someone with a healthy weight, considering there is sufficient access to water. Could the body fat also theoretically be used to determine the weight loss rate of roughly 134grams (about 1,200 calories) per day considering minimal but consistent activity, normal functioning of organs and consistent water intake and secretion. Is my assumption correct that if there is sufficient excess body fat, and water and the person is overall healthy that it's more likely to die from a lack of nutrients such as vitamins and minerals than from lack of food?
Would it be possible to roughly calculate the starvation rate (days) based on fat percentage? Also, side-question: Where would the body get nutrients such as vitamins? Are for example the fat-soluble vitamins A, D, E, and K stored and accessible from the stored body fat?