A comparison of the absorption of Vitamin D with and without pollen

INTERVENTION: Participants are randomised to either vitamin D with spore encapsulation or vitamin D without spore encapsulation. The vitamin D supplement will be taken on an empty stomach after participants have fasted for 10 hours. Blood samples will be taken fasting (time 0), then at 15, 30, 45, 60, 120, 180 and 240 minutes after taking the supplement. Participants will be then given a 1 month washout period before being asked to take the other supplement and blood sampling was repeated as described above. CONDITION: Vitamin D absorption in healthy volunteers ; Nutritional, Metabolic, Endocrine PRIMARY OUTCOME: Area under the curve for 25‐hydroxy (25OH) vitamin D levels at (time 0), then at 15, 30, 45, 60, 120, 180 and 240 minutes after taking the supplement. SECONDARY OUTCOME: 1. Adjusted Calcium; 2. Parathyroid hormone; ; At (time 0), then at 15, 30, 45, 60, 120, 180 and 240 minutes after taking the supplement. INCLUSION CRITERIA: 1. Male or Female subjects between the age of 35‐65 2. No concomitant medication or vitamin supplements 3. No concomitant disease processes 4. Body Mass Index 21‐ 29kg/m2 5. Systolic blood pressure =140 mm Hg and diastolic pressure =85 mm Hg