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HMB + Vitamin D3 + K2

HMB + Vitamin D3 + K2

  • Muscle Growth
  • Bone Health
  • Recovery

Strength and structure — together, by design. HMB works on muscle protein turnover. D3 supports calcium absorption and normal muscle function. K2 supports the proteins that direct calcium where it belongs. Three ingredients, three jobs, one capsule.

  • Supports lean muscle maintenance
  • Supports calcium absorption and normal muscle function
  • Supports normal bone structure
  • Third-party tested for purity and potency
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Product Benefits

  • Supports Muscle Strength & Performance
  • Helps Preserve Lean Muscle Mass
  • Supports Muscle Recovery
  • Promotes Strong Bones & Skeletal Health
  • Supports Healthy Calcium Utilization

How to Use

Take 4 capsules daily with a meal containing some fat — D3 and K2 are fat-soluble, so food genuinely improves absorption.

Use daily and consistently; the published research on these ingredients runs across months, not days. Not intended for use by people under 18, or by those who are pregnant or nursing.

Supplement Facts

Certificate of Analysis

Know Exactly What You’re Taking

We believe trust starts with transparency. Our HMB D3+K2 is third-party lab tested for quality and purity, and the Certificate of Analysis (COA) is available upon request.

Don’t just take our word for it. See the lab results for yourself.

→ Request Our HMB D3+K2 COA

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Customer Reviews

Based on 118 reviews
81%
(95)
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A
Andrew
Impressive Quality, Vital Duo for Wellness!

I recently incorporated Boscent's HMB + Vitamin D3 capsules into my daily routine, and the results have been nothing short of impressive. I can genuinely feel the positive impact on my energy levels and overall vitality.

The combination of HMB and Vitamin D3 with the optimal D3 dosage needed daily (4,000UI) seems to be a vital duo for my well-being. Not only does the Vitamin D contribute to improved energy levels and mental focus, but the added HMB is a game-changer for muscle preservation, which is especially important for me as I navigate the challenges of aging.
Knowing that Boscent supplements are manufactured in GMP-certified facilities, I highly recommend it for those looking for a reliable and effective supplement to support their health journey. Boscent has earned my trust, and I'll certainly be a returning customer.

E
Emilie S.
Extremely satisfied with this HMB and Vitamin D3 Supplement

I have been using this HMB and Vitamin D3 supplement for a few weeks now, and I am incredibly impressed with the results. As an avid fitness enthusiast, I am always on the lookout for supplements that support muscle recovery and overall health. This product has truly delivered on its promises.The combination of HMB and Vitamin D3 seems to be a game-changer for me. I have noticed a significant improvement in my post-workout recovery time. I experience less muscle soreness, allowing me to push harder during my workouts without feeling overly fatigued the next day.Moreover, the inclusion of Vitamin D3 has been fantastic, especially during the winter months when sunlight exposure is limited. It has positively impacted my energy levels and overall well-being. The capsules are easy to swallow, and I haven't experienced any adverse side effects.The quality of this supplement is amazing, and I appreciate the attention to detail in its formulation. I highly recommend this product to anyone looking to support their fitness journey or improve their overall health. I am definitely making this a staple in my daily routine.

A
Alex K.
Solid HMB Supplement

This HMB supplement contains a hefty quantity of capsules in a large bottle, making this a good value on its own right. The capsules are a standard/average size and have been easy to swallow with a bit of water, usually during a meal. The capsules have no taste at all, and don't seem to cause any indigestion. The D3 content is a nice plus as well.Overall the bottle is very well marked and appears trustworthy, so this seems like a solid HMB supplement for the price.

E
Eldee S.D.
D3 Supplement with Calcium and HMB

I like that this supplement has the D3 cholecalciferol form of vitamin D in it. That is my preferred form of vitamin D since it has is more effective than D2. This supplement also contains Calcium and HMB. The Calcium and D3 combination would be helpful in maintaining strong bones and other health benefits. HMB is produced naturally in small amounts in your body, some studies have shown that supplementation may prove helpful in some people in growing muscle, muscle recovery, or reducing muscle breakdown. Given the variety of benefits this supplement has in this combination, it would seem to work well for those looking to improve health while exercising or for those looking to slow degeneration due to age or deficiencies.The capsules are easy to swallow and did not have any significant taste, they did not cause any stomach sensitivities and due to the ingredients, it will be wonderful to see health related benefits these supplements can offer.

A
Amaryllis M.
Very potent 1,000MG HMB and Vitamin D3 Supplement!

Hydroxymethylbutyrate (HMB) is a substance found in the body that is a by-product of leucine metabolism. Leucine is one of three essential branched-chain amino acids. The body produces HMB in small amounts when it metabolizes leucine. In addition to preventing muscle protein breakdown, HMB may help improve strength and muscle mass in older adults, but evidence of a benefit for athletes is lacking. It is not a performance-enhancing drug (PED) or anabolic steroid.Vitamin D is a group of fat-soluble secosteroids responsible for increasing intestinal absorption of calcium, magnesium, and phosphate, and for many other biological effects. There are quite a few differences between vitamin D and vitamin D3, but the main difference between them is that vitamin D is a fat-soluble vitamin that regulates calcium and phosphorous levels in the body, whereas the vitamin D3 is the natural form of vitamin D produced by the body from sunlight.This potent 1,000MG HMB and Vitamin D3 Supplement is stated to be domestically manufactured at Good Manufacturing Practice (GMP) facility which is a system for ensuring that pharmaceutical products are consistently produced and controlled according to quality standards. With 90 days supply this is a great formula at a great price!

V
Vedika, M.a.S.
A health supplement with no foul smell, after taste or side effects.

I cannot comment on the efficacy of a health supplement. I am rating is 4 for two reason - easy to swallow and no after taste or smelly odor.Given that it is winters here and my vitamin D levels drop, looking forward to being healthier.

C
Charles
HMB supplements with D3 plus calcium to support your muscle health

Hydroxymethylbutyrate (HMB) is a chemical that is made when the body breaks down the amino acid leucine. Leucine is one of the building blocks of protein. In muscle cells, HMB stimulates cell growth and survival, so theoretically if you could add to this process you could build muscle.. However, there is little correlation that these supplements along with exercise lead to an increase in muscle mass. This package contains 180 capsules (90) servings. The product is non FDA regulated, so no minimum recommended daily allowance is implied. It is lab tested, contains no GMO, is made in the USA and sealed for your safety.

V
Volley P.
I Recommend!

I'd prefer liposomal capsules, but beggars can't be choosers. In terms of swallowing, it's still fairly smooth. As for its effects, I can't guarantee instant benefits, but I can say that they'll help in the long run. Whether you're sick or an athlete, I still recommend talking to your physician about what dosages are right for you.

F
Frederick M.
Quality product at a great price

have been taking the product for the last 6 weeks and have m noticed a change as aa result

DOCTOR FORMULATED

Developed Alongside Clinicians, Backed by Real Science.

Doctor

We don't do underdosed formulas. Every ingredient is included at the levels used in real research — not trace amounts.

Dr. Sarah Whitman, CNS
(Clinical Nutrition Specialist)
β-hydroxy-β-methylbutyrate

β-hydroxy-β-methylbutyrate

3,000mg per serving Synergistic Support
Why it matters

Protects muscle from breakdown during intense training — so more of the work you put in turns into results.

How it works

As the active metabolite of leucine, HMB slows muscle-protein breakdown and supports protein synthesis.

Research-backed
  • Reduces muscle damage
  • Speeds recovery
  • Helps preserve lean mass
Clinical Study Human Trial
Vitamin D3

Vitamin D3

2,000 IU per serving Foundational Nutrient
Why it matters

Supports bone strength, immune defense, and muscle function.

How it works

Helps your body absorb calcium and phosphorus for bone and immune health.

Research-backed
  • Supports bone density
  • Supports immune function
  • Supports muscle function
Clinical Study Human Trial
Vitamin K2

Vitamin K2

180 mcg per serving Bone-Support Vitamin
Why it matters

Calcium builds the frame you train on — but only if it ends up in the right place. Vitamin K2 (MK-7) directs calcium into bone, where it strengthens your skeleton, instead of letting it settle in soft tissue.

How it works

K2 activates the proteins that manage calcium: osteocalcin pulls calcium into the bone matrix, and matrix Gla protein helps keep it in bone rather than arterial walls. The MK-7 form stays active in your bloodstream for days, so one daily serving keeps working.

Research-backed
  • Supports bone strength & mineral density
  • MK-7 form — superior absorption & long half-life
  • Works synergistically with Vitamin D3
Clinical Study Human Trial
  • Muscle Maintenance

    HMB is the leucine metabolite studied for both sides of muscle turnover — supporting protein synthesis and helping suppress protein breakdown. It is the muscle-retention ingredient most people have never been told about.

    • Supports lean muscle maintenance
    • Studied in older adults
    • Daily use, exercise or not
  • Calcium Absorption & Muscle Function

    Vitamin D3 supports the absorption of calcium and the maintenance of normal muscle function. Low vitamin D status is common in adults over 60, which is exactly the population this formula is built for.

    • Supports calcium absorption
    • Supports normal muscle function
    • Fat-soluble — take with food
  • Structural Support

    Vitamin K2 supports the carboxylation of osteocalcin and other vitamin K-dependent proteins — the mechanism involved in directing calcium into the skeleton. Getting calcium in is one job. Getting it to the right place is another.

    • Supports normal bone structure
    • Works on vitamin K-dependent proteins
    • The partner D3 is usually missing
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Clinically Dosed. Three Ingredients. Three Jobs.

HMB (beta-hydroxy beta-methylbutyrate) is a metabolite of the amino acid leucine. Research summarized by the International Society of Sports Nutrition describes a dual action — supporting muscle protein synthesis and suppressing muscle protein breakdown — through a pathway independent of leucine sensing.

Vitamin D3 (cholecalciferol) supports the intestinal absorption of calcium and the maintenance of normal muscle function. It is fat-soluble, which is why this formula is designed to be taken with a meal.

Vitamin K2 supports the carboxylation of osteocalcin and matrix Gla protein — vitamin K-dependent proteins involved in normal bone mineralization. [VERIFY/INSERT: confirm the K2 form (MK-7 or MK-4) and mcg per serving; MK-7 has a longer half-life and is the form used in the long-duration trials.]

Quality you can trust. Boscent products undergo independent third-party laboratory testing to help verify quality, purity, and consistency. We hold every product to rigorous quality standards so you can feel confident about what’s inside every bottle.

3,000mg of HMB mg per serving
2,000IU of Vitamin D3 IU per serving
180mcg of Vitamin K2 MK7 per serving
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How Might I Benefit Over time?

How Might I Benefit Over time?

Daily for 1 Month

80%
Build the Habit

Attach it to the meal you never skip. D3 and K2 are fat-soluble and HMB is studied as a consistent daily intake, so the routine is the whole mechanism — one time of day, with food, no gaps.

Daily for 2 Months

90%
Stay With It

Three months is where the published research on these ingredients starts reporting. This is a long-horizon formula: the things it supports — muscle maintenance, calcium absorption, normal bone structure — are measured over seasons, not weeks.

Daily for 3 Months

95%
Play the Long Game

The trials behind these ingredients ran for a year and longer. Muscle and skeletal structure are not a twelve-week project — they are the return on a habit you kept when nothing dramatic was happening.

The Evidence Behind It

Expert-Formulated

Developed alongside qualified experts and grounded in published research.

Researched Compounds

HMB, vitamin D3 and vitamin K2 each have a substantial controlled-trial literature behind them — studied individually, at defined doses, in defined populations.

Third-Party Tested

Every production run goes to an independent laboratory for identity, potency and contaminant testing before release.

Skeletal Superiority: How HMB and Vitamin D3 Combine to Enhance Lean Mass and Strength

Muscle Growth

Long-term Effects of Calcium β-Hydroxy-β-Methylbutyrate and Vitamin D3 Supplementation on Muscular Function in Older Adults With and Without Resistance Training: A Randomized, Double-blind, Controlled Study

Read More

Targeted Tissue Protection: Preventing Muscle Wasting and Accelerating Recovery with HMB + D3

Bone Health

Small-Scale Randomized Controlled Trial to Explore the Impact of β-Hydroxy-β-Methylbutyrate Plus Vitamin D3 on Skeletal Muscle Health in Middle Aged Women

Read More

Skeletal Synergy: The Crucial Role of Vitamin D3 and K2 in Directing Calcium to Bone Matrix

Muscle Recovery

The Importance of Vitamin K and the Combination of Vitamins K and D for Calcium Metabolism and Bone Health

Read More
Review stars
Over 1+ Million Units Sold in 2025 for a reason.

Real People, Real Results

HMB + Vitamin D3 + K2

Review for:

HMB + Vitamin D3 + K2

HMB + Vitamin D3 + K2

Review for:

HMB + Vitamin D3 + K2

HMB + Vitamin D3 + K2

Review for:

HMB + Vitamin D3 + K2

HMB + Vitamin D3 + K2

Review for:

HMB + Vitamin D3 + K2

HMB + Vitamin D3 + K2

Review for:

HMB + Vitamin D3 + K2

HMB + Vitamin D3 + K2

Review for:

HMB + Vitamin D3 + K2

HMB + Vitamin D3 + K2

Review for:

HMB + Vitamin D3 + K2

HMB + Vitamin D3 + K2

Review for:

HMB + Vitamin D3 + K2

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Boscent vs Generic D3 + K2

Most D3+K2 products stop at two ingredients and never tell you which form of K2 is inside. Here is what to check.

Generic D3+K2
HMB+D3
Includes3,000mg HMB for muscle
✓
✕
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K2form specified (MK-7 vs MK-4)
✓
✕
✕
Amountof each active stated on label
✓
✕
✕
Third-partytested
✓
✕
✕
COA(Certificate of Analysis)
✓
✕
✕
Potencyguarantee
✓
✕
✕
Manufacturing standard
✓
✕
✕

GMP-Certified Manufacturing

Third-Party Lab Tested for Purity

Formulated by Naturopathic Doctors

GMP-Certified Manufacturing

Third-Party Lab Tested for Purity

Step Into Strength.

100% Satisfaction Guaranteed.

Try Boscent risk-free. If you don’t love the results, we’ll refund you in full — no questions asked.

90
quarterly guarantee window in days

Quarterly Plan

A full quarter, covered. This is a long-horizon formula — give it the time the research gave it, and if it isn’t for you we refund it.

30
monthly guarantee window in days

Monthly Plan

Prefer to start month to month? The monthly plan carries the same refund promise on your first order.

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Because they do three different jobs on the same system. HMB is studied for muscle protein turnover. D3 supports calcium absorption and normal muscle function. K2 supports the vitamin K-dependent proteins involved in directing calcium into bone. Muscle and skeleton carry the same load — this formula supports both rather than making you buy two bottles.

D3 helps you absorb calcium. K2 supports the proteins involved in getting that calcium into bone. Taking D3 on its own addresses one half of the process, which is why the two are so often formulated together.

Adults who want to support muscle and skeletal structure as they age — whether or not they train. Notably, the research on HMB with vitamin D3 in older adults included participants who were not following an exercise programme.

Take 4 capsules daily with a meal that contains some fat — D3 and K2 are fat-soluble and absorb better with food. Same meal every day is the easiest way to never miss one.

Yes. Every batch is independently lab-tested for purity and potency, and a Certificate of Analysis (COA) is available on request. Our products are manufactured in a GMP-certified facility.

If you take an anticoagulant such as warfarin, speak with your healthcare professional before taking any vitamin K product. Not intended for people under 18, or those who are pregnant or nursing. If you take prescription medication or have a medical condition, check with a qualified healthcare professional before adding anything new.