Skratch Labs is the taste pick of this lineup, and endurance athletes have long known it. Sweetened with real fruit and a small amount of cane sugar rather than stevia or artificial sweeteners, it's light, clean and genuinely drinkable hour after hour — the mix you'll actually finish on a long ride, run or hike. The small dose of cane sugar is functional carbohydrate to fuel working muscles, not a marketing flaw, and the ingredient list is exactly the kind endurance athletes favor over heavily-flavored mixes.
The reasons it sits at #7 are dose and sugar, and we're blunt about both. It isn't zero-sugar or keto — that ~4 g of cane sugar rules it out for fasting and low-carb goals — and it's tuned for palatable light fueling rather than maximal electrolyte replacement. Sodium is a respectable ~380 mg, but potassium is notably low at ~39 mg, so the mineral spread is thin. Skratch is the best-tasting training-day mix here and a trusted endurance brand; it just isn't built to be your high-salt, full-spectrum, or zero-sugar electrolyte.