I suspect it would be "just being alive" because I imagine eating chocolate alone would come with a whole host of other problems over a long period of time (inc

I suspect it would be "just being alive" because I imagine eating chocolate alone would come with a whole host of other problems over a long period of time (including scurvy). I'm not sure vitamin D deficiency would be an issue if you were stranded on an island with limited shelter. However, there is something to be said for chocolate's nutritional value in special circumstances. Most modern military rations include chocolate or chocolate-flavored items in some form as a significant part of their caloric value (predominantly fats and carbohydrates, even for the flavored items, as your OP mentioned). Aside from its propensity to melt, its size and weight make it somewhat convenient to carry on patrol and for lightweight rations, calorie-dense items are important. I'm sure there's probably some literature on its use in rations that may be a good starting point, but as far as I remember from watching far too much Steve1989 on YT [1], most of the historic survival rations--think plane crashes--tended to rely on candy, malted milk tablets, or compressed oatmeal/cornflake bars rather than chocolate. I've linked his channel below because I think you might find it fascinating. [1] https://www.youtube.com/channel/UC2I6Et1JkidnnbWgJFiMeHA/videos https://www.youtube.com/channel/UC2I6Et1JkidnnbWgJFiMeHA/vid...