My wife is the nutrition expert (runner) and we've both been taking it daily for about 6 mos. after she noticed a fractured knee was taking its time healing. There is no downside. The water retention thing is likely real but you can get rid of that if it is a concern of your coach before the big climbing races
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I don't do: disks, tubeless, e-shifting, or bead head nymphs. But I do hate all e-bikes.