Vitamins &Essentials

Science-backed essentials to support
your energy, immunity and everyday wellbeing.

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Whatever brought you here today, we want to help. Choose the one that feels closest to you — we'll show you where to start, and why.

I'm always tired, even after sleeping well

Persistent low energy, hard to get going

I keep getting ill more than I should

Frequent colds, slow recovery, low resilience

My mood and focus drop in darker months

Seasonal low mood, brain fog, low motivation

My inflammation or heart markers need attention

Flagged on a blood test or told by a doctor

I take calcium but my bone density isn't improving

Supplements not working as expected

A blood test flagged low vitamin D — now what?

Confirmed deficiency, unsure how to correct it

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The vitamin D problem

Why most people are deficient by winter

Vitamin D3 is synthesised in the skin when UVB radiation hits 7-dehydrocholesterol — a reaction that requires a solar elevation angle above 35°. Northern Europe sits between 50°–60° north latitude. Between October and April, the sun never gets high enough for this reaction to occur.

Immune
Function
Vitamin D3 directly regulates the innate and adaptive immune response — T-cell activation, macrophage function and antimicrobial peptide production. Deficiency significantly impairs the immune system's first-line response to infection.
Bone
Metabolism
D3 is essential for calcium and phosphate absorption from the gut. Without adequate D3, the body cannot maintain bone mineral density regardless of dietary calcium intake — leading to progressive bone loss and increased fracture risk.
Mood
& Mental Health
Vitamin D receptors are expressed throughout the brain. Deficiency is associated with increased risk of depression, seasonal affective disorder and cognitive decline. The correlation between winter D3 deficiency and seasonal mood changes is among the most consistent in nutritional psychiatry research.
200+
Genes Regulated
Vitamin D3 functions as a steroid hormone — binding to vitamin D receptors in cell nuclei and directly regulating the expression of over 200 genes involved in immune response, cellular repair, metabolic function and cardiovascular health.
Our range

Foundational supplements, clinically considered.

The vitamins and essentials that underpin daily wellness — chosen for the clinical evidence behind them, not the marketing around them. New formulations added as they earn their place.

Harmover D3 60,000 IU — high-dose therapeutic vitamin D3 for physician-directed deficiency correction Exclusive
High-Dose Therapeutic · Harmover

D3 — 60,000 IU

Therapeutic-dose D3 for rapid correction of established deficiency, under physician direction. Member-only — practitioner assessment required.

USD 81.30 Sign in to purchase → Purchase →
Vitamin D3 2,000 IU daily maintenance — oil-based capsule for optimal fat-soluble absorption, 120 caps
Daily Maintenance

Vitamin D3 2,000 IU

Daily-maintenance D3 in an oil-based capsule. The fat-soluble matrix significantly improves absorption. 120 capsules — four months supply.

USD 19.90 Sign in to purchase → Purchase →
Omega-3 EPA 180mg + DHA 120mg — pharmaceutical-grade fish oil for cardiovascular and brain health
Cardiovascular

Omega-3 EPA 180mg + DHA 120mg

Pharmaceutical-grade fish oil — EPA for anti-inflammatory & cardiovascular support, DHA for brain & retinal health. 90 capsules.

USD 24.90 Sign in to purchase → Purchase →
Bone & Heart Support — Vitamin K2 MK-7, D3 and calcium for bone density and cardiovascular health
Bone & Cardiovascular

Bone & Heart Support

K2 (MK-7), D3 and calcium in one formula. D3 absorbs; K2 directs calcium into bone rather than arterial walls. Bone density + cardiovascular health.

USD 29.90 Sign in to purchase → Purchase →
Choosing your D3
The 60,000 IU therapeutic dose is for rapid correction of confirmed deficiency — physician-directed, member access only, with dosing set by your Harmover practitioner based on your blood-test results. For ongoing daily maintenance — particularly through winter — the 2,000 IU oil-based capsule is the standard recommendation.
Common questions

Questions about vitamins & essentials

What is the difference between the two Vitamin D3 products at Harmover?
Harmover offers two D3 formulations for different purposes. The Harmover D3 is a 60,000 IU high-dose therapeutic capsule — used for rapid deficiency correction under physician direction, not for daily supplementation. It is a member-only product requiring practitioner assessment. The Vitamin D3 2,000 IU is an oil-based daily maintenance capsule (120 caps) suitable for ongoing supplementation. Your Harmover practitioner will advise which is appropriate based on your vitamin D status and goals.
What is a 60,000 IU vitamin D3 dose for?
A 60,000 IU dose is a therapeutic loading formulation for rapidly correcting established vitamin D deficiency — not for daily supplementation. At this dose it would typically be taken weekly or monthly under physician direction. The Harmover D3 60,000 IU is a member-only product with dosing directed by a Harmover physician based on the individual's deficiency level. It should be taken with a meal containing dietary fats for optimal fat-soluble absorption.
What is the difference between EPA and DHA in omega-3?
EPA (eicosapentaenoic acid) is primarily anti-inflammatory — reducing circulating inflammatory markers, supporting cardiovascular function and mood regulation. DHA (docosahexaenoic acid) is primarily structural — a major component of brain cell membranes, the retina and the nervous system. Both are essential and neither is a substitute for the other. Harmover's Omega-3 provides EPA 180mg and DHA 120mg per capsule — a standard clinical ratio providing both in a single supplement.
How does Bone & Heart Support work?
Bone & Heart Support combines Vitamin K2 (MK-7), Vitamin D3 and calcium. The mechanism is calcium direction — D3 increases calcium absorption from food; K2 activates osteocalcin and matrix GLA protein, which direct calcium into bone mineral and prevent its deposition in arterial walls. Without K2, supplemental D3 and calcium can contribute to arterial calcification. Together they support bone density and cardiovascular health through one integrated mechanism.
Should I take vitamin D3 with vitamin K2?
Yes, ideally — especially at higher D3 doses. D3 increases calcium absorption; K2 (MK-7 form) ensures that calcium is directed into bone rather than soft tissue. If you are taking a standalone D3 product, adding K2 or choosing the Bone & Heart Support formula is the more complete approach. This is especially relevant when using the high-dose 60,000 IU therapeutic formulation, where your Harmover physician will advise on the appropriate accompanying protocol.
Related protocols & categories
NAD+ Protocols LathMized™ NAD+ Protocols Four condition-specific RCT-backed NAD+ repletion protocols — foundational D3 and omega-3 improve protocol outcomes. View NAD+ Protocols Category Mushrooms & Adaptogens Lion's Mane and Chaga Tincture — immune and cognitive support built on a foundation of D3 and omega-3. Explore Category Category Sleep & Mood 5-HTP, Sleep Formula and Ayurvedic Complex — serotonin and cortisol support that pairs with D3 for mood and sleep. Explore Category
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Register free to access the full vitamins range — including the physician-directed D3 60,000 IU loading formulation — with guidance from a Harmover practitioner on the right protocol for your deficiency status.

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Reviewed by
Harmover Wellness Coach Team  ·  April 2026
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References & sources
1 in 6 Public Health England — National Diet & Nutrition Survey, 2020. Vitamin D deficiency prevalence in adults at northern latitudes.
200+ genes Bouillon R. et al. — Endocrine Reviews, 2019. Vitamin D and human health: lessons from vitamin D receptor null mice.
Omega-3 Mozaffarian D. & Wu J.H.Y. — JACC, 2011. Omega-3 fatty acids and cardiovascular disease: effects and mechanisms.