Thorne Vitamin D-1,000 IU (25 mcg) Capsules - Superior Absorption Formula

Immune System Support: Vitamin D3 plays a critical role in activating T-cells and modulating both innate and adaptive immune responses, helping your body identify and respond to pathogens more effectively. This essential nutrient supports the production of antimicrobial peptides in immune cells, providing year-round defence particularly important during Canadian winters when vitamin D synthesis from sunlight is minimal.

Bone Health & Calcium Metabolism: Vitamin D3 enhances intestinal calcium absorption by up to 30-40% and regulates calcium homeostasis through interaction with parathyroid hormone, ensuring proper mineralization of bone matrix. This physiological process maintains bone density, reduces fracture risk, and supports skeletal integrity throughout life, making adequate vitamin D3 intake essential for both growing children and aging adults concerned with osteoporosis prevention.

Mood & Cognitive Function: Cholecalciferol influences neurotransmitter synthesis and brain tissue health by regulating calcium signalling pathways in neurons and supporting the production of serotonin and dopamine. Clinical research demonstrates that maintaining optimal vitamin D levels correlates with improved mood stability, reduced seasonal affective symptoms, and better cognitive performance, particularly beneficial for Canadians experiencing extended periods of reduced daylight exposure.

Clean Formula & Superior Quality: Thorne's vitamin D3 is derived from lanolin and dissolved in medium-chain triglyceride oil for enhanced fat-soluble vitamin absorption, contained in plant-based cellulose capsules free from common allergens. This NSF Certified for Sport® formula undergoes rigorous third-party testing for purity and potency, ensuring you receive exactly 1,000 IU per capsule without solvents, artificial colours, or unnecessary fillers that can interfere with nutrient uptake.