Most alcohol-free beers exist to replace something. Kamo 45 has a different starting point: it was built to a functional brief, with electrolyte levels (calcium, sodium, magnesium and potassium) calibrated to the DGE's post-exercise hydration recommendations. That's an unusual bit of rigour for a beer that also happens to be a lager. It pours bright gold and drinks cleanly. There's a light barley malt sweetness, a faint green apple fruitiness, and a citrus edge from the hops that keeps it from tasting flat. The finish is short and dry. At 26 kcal per 100ml it's about as lean as lagers get, and it avoids the cloying sweetness that catches out a lot of low-calorie alternatives. The 330ml can format is practical for post-exercise use, though it works just as well as a straightforward easy-drinking lager. The Bavarian brewing pedigree shows: it's properly made rather than reverse-engineered from a sports drink.