I do remember these cool juice pouches I'd poke with a straw as a kid. I'd walk around with a bandolier full of them. Or maybe I'd snack on bananas throughout the day.
Actually, before taking steps to saturate myself at whatever level brings me no measurable willpower-deficiency, I'd investigate whether there's a possible training effect to enduring subjectively harder rigors while under the low-glucose condition. Plenty of people regularly don't eat at all until the evening and don't report feeling horrible after adjusting.
In other words, will I become dependent on my glucose-drip (constant snacking) so that I'm worse off if it's interrupted than if I'd never heard of this theory?
Even if I would become dependent with regular use, I'd still employ it at key moments in my life.
There's considerable amount of evidence that willpower is severely diminished if blood glucose get down, and this effect is not limited to humans. And a small sugary drink at the right time is enough to restore it.
We're talking really small numbers. Total blood glucose of a healthy adult is about 5g and it varies within fairly limited range. Then there's maybe 45g in total body waters. Then there's about 100g of glycogen in liver, plus yet larger amount in muscles and other organs, but which doesn't seem to take part in sugar level regulation. For comparison a small can of coke contains 33g - a really small amounts at appropriate times can make a big difference.
This leads to two issues. First, is blood glucose a good explanation for willpower deficiency and therefore akrasia? I'd say there's significant amount of evidence that some effect exists, but is it really the most important factor? Humans are complicated, science knows very little about how we work, and probably half of what it "knows" is false or at best only half-true. Caution is definitely warranted.
And the second issue - if this theory was true - and by manipulating blood glucose levels you could achieve far greater willpower whenever you wanted, what would you do? It seems that exploiting it isn't that easy, and I'd love to hear if any of you tried it before.