Dietary Sodium Intake and Blood Pressure in Living Kidney Donors

Inclusion Criteria: * Living kidney donors who underwent a living kidney donation at least 5 months ago but not more than 12 months * Age ≥18 years old * Agree to perform the procedure as per study protocol (Table 1) * Living kidney donors with an average sitting SBP \<160 mmHg at 5-month post-donation measured by automatic office blood pressure (AOBP) * Able to sign informed consent * Able to attend all research visits * Woman using birth control methods other than hormonal contraception Exclusion Criteria: * History of previous cardiovascular (CV) events including acute MI, HF, and stroke * Symptomatic heart failure within 5 months after living kidney donation or left ventricular ejection fraction (by any method) \<35% * CV event or procedure or hospitalization for hypertensive-related disorders within 5 months after living kidney donation * Diagnosed with HTN or on antihypertensive medication(s) before living kidney donation * Patients who are supposed to take BP lowering medications for reasons other than BP control but do not take those medications or take them with in appropriate doses * Arm circumference is too small or large to allow accurate BP measurement with available 24-h ABPM machines. * An average standing SBP ≥160 mmHg at 5-month post-donation measured by automatic office blood pressure (AOBP) * Albuminuria that equals or is equivalent to 1 g per day by using spot urinary albumin per urine creatinine ratio (UACR) or 24-hour urinary albumin excretion rate by a 24-hour urine collection within 5 months post-donation * Advanced kidney function defined by estimated glomerular filtration rate (eGFR) by using Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) equation22 of \<20 ml/min/1.73m2 or requiring dialysis after living kidney donation * Drink coffee \> two 8-ounce (237 mL) cup a day or equivalence * Drinks alcohol \>3 drinks/day or \>30 ml/day * Smoking cigarette ≥10 cigarettes/day * Take Nonsteroidal anti-inflammatory drugs (NSAIDS) * Use hormone replacement therapy or oral contraceptives * Pregnancy, currently trying to become pregnant * Using birth control pills * A medical condition likely to limit survival to less than 2 years * Any factors that are likely to limit adherence to interventions. For example, * Living kidney donors who cannot come to follow up regularly per study protocol to logistically collect data from enrolled participants. * Active alcohol or substance abuse within the last 5 months of living kidney donation * Plans to move outside the clinic catchment area in the next 4 months without the ability to transfer to come to follow up at SPLID study site. * Significant history of poor adherences with medications or attendance at clinic visits * Significant concerns about participation in the study from spouse, significant other, or family members * Lack of support from primary health care provider * Residence too far from the study clinic site such that transportation is a barrier including persons who require transportation assistance provided by the SPLID clinic funds for screening or randomization visits * Residence in a nursing home or an assisted living * Clinical dementia with or without treatment with medications and cognitively unable to follow the protocol * Other medical, psychiatric, or behavioral factors that may interfere with study participation or the ability to follow the intervention protocol * Inability to obtain informed consent from participant * Living in the same household as an already randomized SPLID participant