I have no idea what your daily “portion” is… so, I’ll say it is the size of around 4 tennis balls placed end to end in length and circumference.
I suppose I could go measure a few of the frozen loaves in my icebox and provide you an aggregate of bread volume, but the tennis ball sizing method is fairly typical of their size. Maybe 4 baseballs depending on how thick the loaves are that day.
100% whole grain will probably keep your body more balanced when on bread-and-water only. Refined grains in white bread and many mixed grain breads (e.g. 12-seed) is chemically similar to sugar, which could be problematic if you are diabetic or have a similar dietary sensitivity.
I have tried neither personally, but I do have a very good friend who made her own for a bread/water fast one year, and she said it worked well for her. I would look around for good recipes and make your own - it’s part of the process of sacrifice too, giving up your time to make your own food, as opposed to going out and buying it off the shelf.
Who is to say that the person is doing this more than a day or two? Please.
People need to know their own limitations and health risks. Who is to say that other options aren’t there?
Those who do serious athletics choose different food, etc than those who merely want to run a mile or two a day. The 1-2’er doesn’t need half the GNC store like the Olympic dreamer does.
What constitutes a serious fast? That bread is expensive… ~30 bucks for 24 oz. Can’t see that being a very cheap fast if truly serious in length.
Some of us can only afford “cheap, white bread”, btw. Especially in comparison with that meal-in-a-slice price.
Anyone who starts a “serious” fast without understanding what they’re doing probably needs to rethink certain things anyway. As for me, I’ll keep eating cheap white bread because paying 30+ for 24oz is on par with oxygen deprivation at birth.
I have never seen 100% whole grain breads selling for appreciably more than cheap, white bread. Even if it were twice the price, the day of a bread/water fast would cost little enough, food-wise, to allow a premium for more nutritious bread. Try Roman Meal or something.