I trust Bulletproof's vitamin A with D&K for better absorption and health results.
Bulletproof's vitamin A with D&K combines essential cofactors for enhanced absorption, helping address deficiencies despite prior supplements failing me.
This is a review of product:
Bulletproof Vitamins A-D-K Softgels, 30 Count, Supplement for Heart, Bone Health and Immune Support
From Amazon.com
Been taking 5000ui of vitamin d for a year or so and my vitamin d levels are still low ~20s.
Decided to see if adding vitamin k would make a difference. This was one of the only formulas that had all the different types of vitamin k.
Reviewing vitamins is hard because you might get exactly what you paid for but it doesn't necessarily make a difference for your body. I wanted vitamin d with the other vitamins that go with it and trust the bulletproof brand, so I went with them even though they are quite expensive.
Vitamin Basics & Tips
Understanding Vitamin D Deficiency
Vitamin D levels around 20 ng/mL are clinically low (normal is 30-100 ng/mL). Deficiency causes fatigue, bone pain, and weak immunity. Factors like limited sun exposure, dark skin, or poor gut absorption contribute. The reviewer's 5000 IU daily dose is common, but individual needs vary based on weight and metabolism.
Vitamin K's Crucial Role
Vitamin K comes in K1 (leafy greens) and K2 (fermented foods, meats). K2 subtypes like MK-4 and MK-7 direct calcium to bones/teeth, preventing artery calcification. Combined with D, it boosts bone health and may enhance D absorption by activating proteins.
Synergy Between Fat-Soluble Vitamins
Vitamins A, D, and K work together: D aids calcium absorption, K regulates calcium distribution, and A supports immune function and vision. Taking them together optimizes benefits—like in Bulletproof's formula—reducing deficiency risks.
Vitamin A Essentials
Vitamin A (retinol/beta-carotene) maintains vision, skin, and immunity. Daily needs are 900 mcg for men and 700 mcg for women. Sources include liver, carrots, and spinach. Deficiency causes night blindness, while excess can be toxic—stick to recommended doses.
Choosing Quality Supplements
Bioavailability matters: natural forms (like retinol for A) absorb better than synthetics. Reputable brands (e.g., Bulletproof) use third-party testing. Pair supplements with healthy fats (avocado, nuts) for optimal uptake.
Common Vitamin A Questions
Can I take vitamins A, D, and K daily? Yes—combining them is safe at recommended doses. Does cooking destroy vitamin A? Lightly cooked veggies retain beta-carotene better than raw. Who needs supplements? Those with restricted diets, malabsorption issues, or limited sun exposure benefit most.
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