BODYARMOR Flash I.V. earns its place at #3 by winning the one dimension no other product on this list can touch: potassium. At 700 mg of potassium per stick packet — nearly double Re-Lyte's 400 mg and more than three times LMNT's 200 mg — it stands apart for athletes who prioritize muscle function and cramp prevention alongside hydration. The coconut-water base contributes naturally occurring potassium and a distinctive taste profile, while 65 mg of magnesium and 11 mg of zinc (unique on this list) round out the mineral panel. The zero-sugar formula (0 g sugar, though 15 kcal from its coconut water base) places it firmly in the clean-hydration category. BODYARMOR's backing from Coca-Cola brings distribution advantages — you'll find Flash I.V. in mainstream retail channels where boutique brands like LMNT or Re-Lyte may not appear — and the brand's sports credibility is well established across professional athlete endorsements. The trade-offs are notable, however. Sodium at 510 mg is competent but trails both LMNT and Re-Lyte substantially, making Flash I.V. a less ideal choice for high-sweat situations where sodium replacement is the primary need. At $1.25 per serving it's among the pricier options here, and only six flavors give consumers limited variety. The 15 kcal are unlikely to matter to most users, but strictly zero-calorie seekers should note it. For anyone whose summer activities — cycling, tennis, soccer — come with a known history of cramping or whose diet is already sodium-forward but potassium-light, Flash I.V. is the most targeted formula on this list.
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