Vitamins A-D-K

Name: Vitamins A-D-K
Brand: Bulletproof
SKU: product-0356
Price: 50.00 GBP
Availability: InStock
Rating: 4.8 (12 reviews)

£50.00

Bulletproof Vitamins A-D-K is a combined fat-soluble vitamin supplement delivering vitamins A, D3, K1, and K2 in a single daily softgel.

Supports bone mineralisation via D3, K1, and K2
Helps direct calcium away from soft tissues
Consolidates four fat-soluble vitamins in one softgel
Relevant for those with low sun exposure or confirmed low D3
May support immune defence and normal cell function

4.8 (12 reflections)

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About This Product.

Bulletproof Vitamins A-D-K is a combined fat-soluble vitamin supplement delivering vitamins A, D3, K1, and K2 in a single daily softgel. These four nutrients are grouped together for good reason: they work through overlapping pathways, particularly around calcium regulation, bone mineralisation, and immune function.

Vitamin D3 is the form the body produces from sunlight and the one most readily used by cells. In the UK, where low sun exposure is the norm for much of the year, D3 deficiency is common and often undiagnosed. Vitamins K1 and K2 are both involved in directing calcium to where it belongs — bones and teeth — and away from soft tissue. Vitamin A supports immune defence, vision, and cell differentiation. Delivering all four together in a softgel format is practical: fat-soluble vitamins absorb better alongside dietary fat, and a single capsule reduces the burden of managing them separately.

This combination suits people who have identified low vitamin D through blood testing, those with limited sun exposure, or anyone seeking to consolidate fat-soluble micronutrient support into a clean, minimal daily routine. It is relevant in performance contexts too, where bone density, immune resilience, and recovery all matter.

Bulletproof have built a reputation around ingredient transparency and quality formulation. The use of D3 (cholecalciferol) rather than D2, and the inclusion of both K1 and K2, reflects an evidence-aware approach to fat-soluble vitamin supplementation.

Frequently Asked.

Why does this include both K1 and K2?

K1 and K2 are distinct forms of vitamin K with somewhat different roles. K2 in particular is studied for its involvement in activating proteins that regulate calcium deposition, steering it towards bones rather than arteries. Including both offers broader coverage across vitamin K's functions.

Do I need to take this with food?

Yes — fat-soluble vitamins (A, D, K) absorb significantly better when taken with a meal containing some fat. A softgel format already aids absorption, but pairing it with food makes a meaningful difference.

I already take a separate vitamin D supplement. Can I still take this?

Potentially, but you should check with a clinician first. Vitamin D toxicity from excessive intake is rare but real, and combining multiple D3 supplements without knowing your baseline levels is not advisable. A blood test is the sensible starting point.

Who is this particularly well-suited for?

People with limited sun exposure, those living in northern latitudes (including most of the UK), individuals with confirmed low vitamin D on a blood test, and anyone looking to simplify a multi-supplement routine into a single daily capsule.

How long before I notice a difference?

Fat-soluble vitamins accumulate gradually, so changes in measurable markers like serum vitamin D typically take several weeks to register. If you are supplementing to address a deficiency, a follow-up blood test after 8–12 weeks is a reasonable way to assess progress.

Customer Reflections

Overall Sentiment

4.812 reflections

1 – 6 of 12 reflections

Finally sorted my vitamin D levels

4 months ago

Had a blood test last autumn showing my D was on the floor — not surprising given I work indoors all day. Been taking this daily for about three months now and retested last week, levels are properly back in range. Like having the K in there too so I'm not just dumping calcium somewhere it shouldn't go. One softgel, done. No faff.

Consolidated my whole fat-soluble stack

4 months ago

Used to take D3, K2, and A separately which was getting ridiculous — three different bottles, different timings. This does all of it in one softgel and I take it with breakfast. Genuinely can't tell the difference in absorption vs my old routine but it's so much simpler. Been on it about six weeks and feel good. Will keep buying.

Good formula, capsule is a bit large

5 months ago

The combination of nutrients is solid and I appreciate that it's D3 not D2. My only gripe is the softgel itself is noticeably bigger than I expected — not a dealbreaker but it took a bit of getting used to. Might bother people who struggle with capsules. Other than that, no complaints after two months of use.

5 months ago

Switched to this from a cheaper supermarket D3 and I actually notice a difference in how I feel through winter. Taking it with my morning coffee and a bit of peanut butter so the fat-soluble absorption is covered. Really happy with it.

Solid addition to my daily stack

6 months ago

Training five days a week and bone health isn't something I want to neglect long-term. This ticks the boxes — A, D3, K1 and K2 all in one. I take it post-workout with a meal. No weird aftertaste, easy to swallow. Been ordering this for about four months now.

Recommended by a friend who's a nutritionist

6 months ago

She pointed me toward this when I mentioned I was taking just a plain D3 through the winter. The reasoning around having the K alongside it made sense to me. I'm not someone who notices dramatic shifts from supplements but I've had fewer colds this winter than usual and my energy's felt pretty steady. Probably a combination of things but this is staying in my routine.

Vitamins A-D-K

About This Product.

How to Take It

Frequently Asked.

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