Vitamins D3 and K2 work synergistically in the body. Vitamin D3 helps your body absorb calcium from your diet, while vitamin K2 directs that calcium to your bones where it's needed, rather than allowing it to accumulate in arteries and soft tissues. This partnership is crucial for both bone and cardiovascular health. Taking these vitamins together maximizes their benefits and helps prevent potential imbalances that could occur when taking vitamin D3 alone.

Vitamin K1 (phylloquinone) is primarily found in leafy green vegetables and mainly supports blood clotting. Vitamin K2 (menaquinone), particularly the MK-7 form in our supplement, stays active in the body longer and has a stronger affinity for bones and arteries. K2 activates proteins that help bind calcium to bone matrix and prevent calcium from depositing in arteries. While both forms are important, K2 appears to have more significant benefits for bone and cardiovascular health.

BioPerine® is a patented extract from black pepper that contains piperine, which has been shown to enhance the bioavailability of many nutrients. We included 5mg of BioPerine® to improve the absorption of both vitamins D3 and K2, helping to maximize the effectiveness of our formula. This addition ensures you get the most benefit from each capsule, as both fat-soluble vitamins are better absorbed when paired with this natural absorption enhancer.

Each capsule contains 125 mcg (5,000 IU) of vitamin D3, which provides 625% of the Daily Value. This potency is designed to effectively raise and maintain healthy vitamin D levels, especially for those with deficiency or limited sun exposure. The 5,000 IU dose is within the range that research shows can safely and effectively optimize vitamin D status for most adults.

Research suggests that vitamin D deficiency may be linked to seasonal affective disorder (SAD) and depression. Our D3/K2 Synergy provides 5,000 IU of vitamin D3 per capsule, which may help support mood regulation during seasons with limited sunlight. Many users report improvements in mood and energy levels after correcting vitamin D deficiency. However, results vary by individual, and this supplement works best as part of a comprehensive approach to mental wellbeing.

Our D3/K2 Synergy supplement is designed to accommodate multiple dietary needs. It uses vegetable capsules and is free from animal-derived ingredients. The vitamin D3 is sourced from lichen (a plant-like organism) rather than lanolin (sheep's wool), making it suitable for vegetarians and vegans. Additionally, this supplement is gluten-free, lactose-free, corn-free, and contains no added sugar. It's manufactured in an NSF-certified facility, ensuring the highest standards of purity and quality for those with sensitive dietary requirements.

Vitamin D3 plays a crucial role in immune system function. It helps regulate both innate and adaptive immune responses, supports the production of antimicrobial peptides, and modulates inflammatory responses. Research shows that maintaining optimal vitamin D levels may reduce the risk and severity of respiratory infections and support overall immune resilience. The 5,000 IU dose in our formula is designed to effectively optimize vitamin D status for immune support.

For optimal absorption, take D3/K2 Synergy with a meal that contains some fat, as both vitamins are fat-soluble. Many users find taking it with breakfast or lunch works well. The supplement can be taken any time of day, but some people prefer not to take it in the evening as vitamin D can influence circadian rhythm in some individuals. Consistency is more important than timing—taking it at the same time each day helps establish a routine.

The timeline for noticeable results varies depending on your starting vitamin D levels and individual factors. Most people begin to experience improvements in energy and mood within 2-4 weeks. Benefits for bone health and immune function may take longer to develop, typically 3-6 months of consistent supplementation. For those with significant deficiency, the positive effects may be more pronounced and occur more quickly once levels begin to normalize.

While D3/K2 Synergy contains natural nutrients, both vitamins—especially K2—may interact with certain medications. Vitamin K2 can affect blood-thinning medications like warfarin (Coumadin). Vitamin D may interact with certain heart medications, steroids, weight loss drugs, and seizure medications. If you're taking prescription medications, particularly blood thinners or cardiovascular drugs, consult with your healthcare provider before starting this or any supplement.