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No shortcuts. No gimmicks. Fuel that meets the highest standard.
D3 increases calcium availability. K2 ensures calcium is utilized correctly. Together: maximum bone support + cardiovascular protection. This is synergy, not just supplementation.
Vitamin D3 increases calcium absorption from the gut. Vitamin K2 activates osteocalcin — the protein that binds calcium into your skeletal matrix. ...
K2 activates matrix Gla-protein (MGP), which inhibits calcium deposition in arteries and soft tissue. This keeps calcium out of your blood vessels ...
Vitamin D functions as a prohormone, influencing gene expression in tissues ranging from bone and muscle to the immune system and brain. It support...
Two key differentiators: First, we include a clinically relevant dose of K2 (200 mcg) — double what most competitors offer. Second, we use the MK-7 form of K2, which is the most bioactive and long-lasting form. Most D3 supplements either skip K2 entirely or underdose it.
D3 increases calcium absorption, but it doesn't control where that calcium goes. Without K2, calcium may deposit in arteries and soft tissue instead of bones. K2 activates the proteins that direct calcium into your skeletal system and keep it out of your blood vessels. They work as a synergistic system.
MK-7 (Menaquinone-7) is the most bioactive and long-lasting form of Vitamin K2. It has a longer half-life than MK-4 (the other common form), meaning it stays active in your body longer and provides more consistent support for calcium-regulating proteins.
5,000 IU is a high-potency dose designed to maintain optimal blood levels of Vitamin D, especially for active individuals. Many adults are deficient, and the standard 400-1,000 IU doses often aren't enough to reach optimal levels. This dose supports bone metabolism, immune defense, hormonal balance, and muscle function.
200 mcg is the clinically relevant dose shown to effectively activate calcium-regulating proteins like osteocalcin and matrix Gla-protein. Many brands underdose K2 at 100 mcg or less. We chose efficacy over cost savings.
Vitamin D functions as a prohormone that influences gene expression in immune cells. It supports innate defenses (your body's first line of response) and helps maintain balanced immune responses, helping your body respond effectively to pathogens without overreacting.
Yes. Adequate Vitamin D helps maintain muscle strength, protein synthesis, and neuromuscular coordination. Vitamin D receptors are present in muscle tissue, and deficiency is associated with muscle weakness and reduced performance.
Take one capsule daily with food. Both D3 and K2 are fat-soluble vitamins, so taking them with a meal containing fat improves absorption.
Yes. This formula provides clinically relevant doses designed for people who demand more from their body. It supports bone density, cardiovascular health, immune resilience, hormone balance, and muscle function — foundational systems for performance and recovery. Manufactured in cGMP-compliant FDA-registered facilities.
Yes. D3 and K2 are foundational nutrients that complement other supplements. They support the structural and systemic health that enables everything else you do.
Overall rating: 4.7954545 / 5 from 44 reviews.
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"Actually saving these for winter Vitamin D use so not sure how they work yet. I’ve had nothing but good luck with this company though. I use the protein powder, jocko greens,, punch pre workout. And energy drinks on a regular basis. I’ve used a lot of supplements this brand is legitimate High Quality"
"I'm just on my first bottle but like one of the other reviews, I agree that it is pretty shocking how much space is in this bottle. I was really pleased with the 60 servings in the B-complex bottle and was a little disappointed in the amount of space in this bottle especially considering the amount of servings that was in the old vitamin D bottle. 60 servings would be a nice upgrade for this one."
"Everything came on time. No problems. Zero excuses. Glory to God! Thank you JOCKO and to all that make the company what it is."
"Wish they would ship a bigger bottle, a 30 day supply barely covers the bottom of the bottle they send it in. Would gladly buy a 90 day supply to have less packing waste."
"I have noticed an increase in energy and alertness. An affordable edge."
"I was happy to get this supplement back with the add of the K2. I previously took the Jocko D3 and had requested this when the D3 was discontinued. Happy to have it back."
"High quality ingredients with appropriate dosages. Can’t go wrong with Jocko Fuel"
"I’ve purchased a number of different supplements over the years from different companies but Jocko’s are by far the best. The protein powder is the best tasting and most natural that I’ve come across. As a result, I’ve continued to expand the number of products that I’ve been sole sourcing through Jocko! I’ve even ventured to his Origin brand to purchase my first pair of boots that are 100% American made! Perfect fit and comfortable from the moment I put my feet in them! Very happy to support American workers."
"D3-K2 and B complex were the only daily supplements (other than an NAD) I take that I couldn’t get from Jockofuel so I was pretty excited when these came out. I can’t say I have ever really felt a noticeable effect from taking D3-K2 in general from any brand but I feel as good as ever have and did just manage to not get the flu after my wife and kid had it bad. Not sure how much this supplement factored in but at least a factor. Anyway, above all I trust the process and ingredients in Jocko fuel products and glad I can add their D3-K2 to my daily supplement intake."
"Little jolt, enjoy it"
