The goal of this intervention is to determine the efficacy of coconut sap powder (CSP) to lower arterial stiffness and blood pressure in middle-aged and older adults. Participants will be randomized to the CSP arm or Placebo arm of the study. Primary endpoints include: aortic stiffness assessed by carotid-femoral pulse wave velocity, resting brachial and (non-invasive) carotid blood pressure, and carotid stiffness (e.g. Beta stiffness index, Carotid compliance, Elastic modulus, Distensibility).

Inclusion Criteria:

• Body mass index 18-35 kg/m2
• Brachial blood pressure <140/90
• Nonsmoker
• No known clinical disease, or suggestive signs or symptoms of clinical disease
• Free of alcohol or drug dependence

Exclusion Criteria:

• taking any anti-hypertensive, lipid lowering or other cardiovascular altering medications
• Known allergies to coconut or tree nuts (i.e., cashews, almonds, or pistachios)
• Engaging in vigorous intensity exercise