Table 1.

Effect of prolonged K⁺ intake in healthy humans

Reference	Number of subjects	Method of increasing K+ intake	Baseline K+ intake (mEq/d)	Final K+ intake (mEq/d)	Duration of intervention (days)	Baseline serum K+ (mmol/l)	Final serum K+ (mmol/l)
Rabelink 199020	6	KCL supplement 300 mEq/d	100	400	20	3.75	4.22
Witzgall 198622	16	K citrate + KHCO3 2000 mEq/d	60	260	6	4.2	4.6
Sebastian 199421	6	KHCO3 120 mEq/d	59	179	18	3.92	4.15
Jenkins 200119	10	Grain-free vegetarian diet	98	341	14	4.26	4.03
Hene 198618	6	K citrate 220 mEq/d	80	300	14	4.07	4.48