A recent question discussed how to maximize water retention on a desert hike. One answer suggested that 100g of protein lead to 800ml loss through urination, so protein intake has to be minimized.
What are low protein hiking friendly foods that minimize water loss?
Special non-thirst provoking foods have been developed for lifeboats, these look like ordinary cookies:
Ingredients: Sugar, Enriched Wheat Flour, Partially Hydrogenated Vegetable Shortening (Soybean & Cottonseed Oils), Corn Starch, Wheat Gluten, Dextrose, Desiccated Coconut Preserved with Sodium Metabisulfite, Corn Syrup, Contains less than 2% of the following: Soy Lecithin, Guar Gum, Calcium Propionate Preservative, Citric Acid, Salt, Ascorbic Acid, Ascorbyl Palmitate, Niacin, Vitamin A, Palmitate, Riboflavin, Thiamine Mononitrate.
Here is a datasheet for a similar product, the bar contains:
18g fat, 36g carbs, 5g protein Wheat flour, vegetable fat (palm), sugar vitamins C, B1, B6
Protein:carbs is about the ratio found in wheat flour with some extra sugar. Nothing extraordinary.
Not very appetizing and also for sedentiary people sitting in a lifeboat.
That brings up the question: What are more realistic food options?
What about salt? Salt increases water retention and is needed to replenish losses through sweating. What is the best way to take in salt? A salty meal (e.g. fatty fried bannock) + water, or a survival cookie + electrolyte drink (oral rehydration solution / gatorate).