Seeking Health Vitamin D3 + K2 Review
Seeking Health's Vitamin D3 + K2 supplement is a best-selling, high-potency formula designed to support overall health, particularly immune function, bone density, and dental health. Each small, easy-to-swallow capsule delivers 5,000 IU of Vitamin D3 and 100 mcg of Vitamin K2 as vitaMK7®, a long-acting form of K2 that remains active in the body for up to 72 hours, significantly longer than other forms. This synergistic combination is crucial as Vitamin D3 aids in calcium absorption and metabolism, while Vitamin K2 helps direct calcium effectively into bones and teeth, preventing its accumulation in soft tissues like blood vessels. The product is formulated with uncompromising quality, featuring third-party testing and high-end ingredients, ensuring purity and potency. It is suitable for a wide range of individuals, including those who are bariatric, methyl sensitive, pregnant, breastfeeding, vegetarian, and children aged 4 and up (with adjusted dosing). Dr. Lynch, a key figure at Seeking Health, recommends daily use, ideally after dinner, and advises periodic testing of Vitamin D3 levels to maintain an optimal range of 30-50 ng/mL. He also highlights the importance of magnesium in supporting Vitamin D3 metabolism, suggesting pairing this supplement with Optimal Electrolyte or Optimal Magnesium. Vitamin D3 + K2 is particularly beneficial for individuals with darker skin, those who are overweight, people over 50, those with indoor jobs, or anyone needing to avoid sun exposure. It is also recommended for those experiencing issues with teeth, children undergoing growth spurts, residents of low-sunshine areas, individuals looking to support healthy blood sugar levels, or those who frequently experience colds, styes, and cold sores, indicating a need for immune system support. Furthermore, it addresses concerns for individuals with aching or weaker bones and those with clinically low Vitamin D3 levels. The product is HSA/FSA accepted, offering potential tax savings, and comes with a 60-day satisfaction guarantee and free shipping, underscoring Seeking Health's commitment to customer well-being and product efficacy.
Study, Trial or Testing Result SummaryMembersHuman studies
Review Totals and SummaryMembers2,741 reviews
Biohacker SummaryMembersWhat our biohacker panel says
RAL SummaryMembersThe tier and why
More DetailsMembersBody systems · Combine with · Possible side effects
Supplement FactsVitamin D 125 mcg (5,000 IU) · Vitamin K2 100 mcg
| Vitamin D (as cholecalciferol) | 125 mcg (5,000 IU) | 625% |
| Vitamin K2 (as menaquinone-7) | 100 mcg | † |
Other ingredients: Microcrystalline cellulose, vegetarian capsule (hypromellose and water), ascorbyl palmitate, silica.
Directions: As needed, take 1 capsule with food any time of day or night, or as directed by your healthcare professional.
Barcode (UPC) 810007521367 · Label source: Pureformulas · Report a label change
Graded October 24, 2026 by the Reverse Age Lab evidence engine, from human studies, real reviews and our biohacker panel. How we grade. Is this medical advice? No. Rala organizes the published evidence; go over any change with your doctor, especially if you take meds.

