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Developed with CSIRO · Organic Certified

Pure Shiitake
Vitamin D.
Nothing else.

Because you care what you put in your body. No fillers, no solvents, no synthetics. Whole-food vitamin D activated by UV light — the same way your body makes it from sunlight.

Shop All Products How It Works
30-day guarantee Free returns Ships worldwide
4.9
Average rating
29+
Ships to 29+ countries
100%
Whole-food, no fillers
CSIRO
Science partnership
Most Popular
Natural Vitamin D 1000IU (100% Shiitake)
1000 IU
Natural Vitamin D 1000IU (100% Shiitake)
100% whole-fruiting body Shiitake · UV-activated · Organic certified
No fillers Vegan Worldwide shipping
$39.95 AUD
Add to Cart
Southern Cross Organic Certified
Developed with CSIRO
HACCP & GMP Certified
Ships Worldwide
Zero-Waste Packaging
3rd Party Lab Tested
The Problem

1 in 4 people worldwide are vitamin D deficient.

Most people reach for a synthetic supplement. Hi-D is different. Our Shiitake mushrooms are UV-activated using bespoke light technology — producing vitamin D2 the same way your skin produces it in sunlight. Bioavailable. Clean. Whole-food.

25%
of people globally are clinically vitamin D deficient
0
Synthetic additives, fillers or solvents in every Hi-D product
Our Products

Choose Your Strength

Every product contains 100% pure Shiitake — no extracts, no mycelium filler, no binders. Just the mushroom.

Natural Vitamin D 1000IU (100% Shiitake)

Natural Vitamin D 1000IU (100% Shiitake)

Hi-D Natural Vitamin D 1000 IU - 60 Capsules is a whole food, plant based  Vitamin D ma...

$39.95 AUD
Best Seller
Natural Vitamin D 1000IU + Beta-Glucan (100% Shiitake)

Natural Vitamin D 1000IU + Beta-Glucan (100% Shiitake)

Hi-D Natural Vitamin D Beta Glucan 1000 IU - 60 Capsules is a whole food, plant based  ...

$44.95 AUD
Natural Vitamin D 3000IU (100% Shiitake)

Natural Vitamin D 3000IU (100% Shiitake)

Hi-D Natural Vitamin D 3000 IU - 60 Capsules is a whole food, plant based  Vitamin D ma...

$49.95 AUD
Natural Vitamin D 5000IU (100% Shiitake)

Natural Vitamin D 5000IU (100% Shiitake)

Hi-D Natural Vitamin D 5000 IU - 60 Capsules is a whole food, plant based Mushroom Vita...

$59.95 AUD

Buy 3 or more — save 20% automatically

Mix and match any products. Discount applied at checkout. No code required.

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✓ 30-day satisfaction guarantee  ·  Free returns  ·  Ships worldwide

The cleanest vitamin D supplement available.
Our Difference

The cleanest vitamin D supplement available.

Most vitamin D supplements are synthetic — derived from lanolin (sheep’s wool) or chemical processes. Hi-D uses a completely different approach, grounded in whole-food nutrition science.

  • UV-activated Shiitake — vitamin D produced the same way human skin makes it
  • Whole-fruiting body only — no mycelium, no grain filler, no starchy binders
  • 100% plant-based and vegan — no lanolin, no animal products
  • Grown on certified organic small-scale farms
  • Zero-waste policy with fully recyclable packaging
Health Benefits

One mushroom. Six science-backed benefits.

Shiitake is nature’s most nutrient-dense functional mushroom.

Bones & Joints

Vitamin D is essential for calcium absorption and bone mineral density. Shiitake contributes phosphorus to build and maintain strong, resilient bones throughout life.

Immune Support

Vitamin D activates immune cell defences. Shiitake's selenium, folate, and copper amplify your body's natural protection against pathogens.

Gut & Heart Health

Beta-glucans from Shiitake have been shown to reduce cholesterol absorption in the gut and support a balanced, healthy gut microbiome.

Mood & Mental Health

Pantothenic acid, niacin, biotin, and folate in Shiitake support healthy nervous system function and emotional balance.

Hair, Skin & Nails

Biotin, copper, niacin, riboflavin, and selenium — five nutrients working together to support radiant skin, strong nails, and healthy hair.

Energy & Metabolism

Six B-vitamins — B2, B3, B5, B6, B7 and B9 — support healthy metabolism, energy production, and help reduce fatigue.

Verified Quality

Quality you can see. Science you can trust.

We back every claim with independent verification and certified manufacturing processes.

Organic Certified

Southern Cross Organic Certified — independently audited organic standards verified on every batch.

GMP Certified Facility

Good Manufacturing Practice certified manufacturing — professional, controlled production environment.

HACCP Certified

Hazard Analysis Critical Control Point — the recognised gold standard in food safety management systems.

3rd Party Tested

Every product independently lab tested and results published. Full transparency — no exceptions.

Developed in collaboration with Australia’s national science agency.
Science Partnership

Developed in collaboration with Australia’s national science agency.

Hi-D was developed alongside CSIRO — the Commonwealth Scientific and Industrial Research Organisation. Our UV-activation process and product formulations are grounded in peer-reviewed science, not marketing claims.

Read About Our Process

CSIRO

Commonwealth Scientific and Industrial Research Organisation

Australia’s national science research agency
Customer Reviews

Trusted by Australians.

“Finally a vitamin D supplement I feel good about taking. No fillers, no synthetic ingredients. My GP commented on my improved blood results after three months and I've stuck with Hi-D since.”

SM
Sarah M.
Sydney, Australia

“I've tried every vitamin D supplement on the market over the years. This is the only one that doesn't cause digestive issues. I notice the difference in my energy within weeks of consistent use.”

JT
James T.
London, UK

“As a vegan I had almost given up finding a clean vitamin D. Hi-D is 100% plant-based, certified organic, and actually backed by science. I order on the bundle deal every few months.”

LK
Laura K.
Toronto, Canada
Common Questions

Everything you want to know about Hi-D

What is the difference between vitamin D2 and D3?

Hi-D contains vitamin D2 (ergocalciferol) naturally produced via UV-activated Shiitake mushrooms. Research shows whole-food D2 from mushrooms is highly bioavailable and effective at raising serum vitamin D levels.

Is Hi-D suitable for vegans?

Yes — 100% plant-based. Most vitamin D3 supplements are derived from lanolin (sheep's wool). Every Hi-D product comes entirely from organic Shiitake mushrooms, with no animal products at any stage.

What does 'whole-fruiting body' mean?

We use the mushroom cap and stem — the actual fruiting body — not mycelium. Many competitors grow mycelium on grain, resulting in a product that is largely starch with minimal mushroom content.

How long until I notice a difference?

Most customers notice improvements in energy and mood within 3-6 weeks of consistent daily use. Blood level improvements typically show in a standard 3-month blood test with your doctor.

Do you ship internationally?

Yes. We ship to 29+ countries worldwide with a flat-rate international shipping fee. Free shipping applies to Australian orders over $80 AUD.

What is your return and satisfaction policy?

We stand behind every product. If you are not satisfied within 30 days, contact us and we will make it right — no complicated process required.

Ready to feel the difference?

Join thousands of customers worldwide who have switched to the cleanest, most transparent vitamin D supplement available.

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