Home Ingredients Earthlight® (Whole Food Mushroom Vitamin D2)
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Earthlight® (Whole Food Mushroom Vitamin D2)

Agaricus bisporus
Evidence Level
Moderate
1 Clinical Trial
3 Documented Benefits
3/5 Evidence Score

Earthlight® (PLT Health Solutions) is a whole food Vitamin D ingredient derived from UV-treated white button mushrooms (Agaricus bisporus) that provides plant-based Vitamin D2 in its natural food matrix — complete with the cofactors, fiber, beta-glucans, and phytonutrients present in whole mushrooms. Unlike isolated Vitamin D2 or D3 synthetics, Earthlight® delivers Vitamin D within its natural food context, making it ideal for plant-based, clean-label, and whole food positioning. Mushrooms are the only non-animal whole food that can produce significant Vitamin D through UV light exposure.

Studied Dose 250–1000 IU Vitamin D2 equivalent per serving as Earthlight®; dosing equivalent to 25–100 mg Earthlight® mushroom powder; adjust to achieve target serum 25(OH)D levels (50–80 ng/mL optimal range)
Active Compound Vitamin D2 (ergocalciferol) in whole mushroom food matrix — Earthlight® by PLT Health Solutions; UV-treated Agaricus bisporus white button mushroom powder providing natural food-form Vitamin D2 with co-occurring beta-glucans, fiber, and phytonutrients

Benefits

Plant-based whole food Vitamin D for clean labels

Earthlight® provides Vitamin D in its natural food matrix — the only plant-sourced whole food Vitamin D commercially available. This meets growing consumer demand for plant-based, minimally processed, and clean-label nutrition without synthetic D3 (lanolin-derived) or isolated D2 ingredients. The mushroom food matrix also provides co-occurring immune-supportive beta-glucans, fiber, and antioxidants absent in isolated Vitamin D supplements.

Supported by Trial 1

Immune function support

Vitamin D from Earthlight® supports all aspects of immune function — innate immunity (macrophage activation, antimicrobial peptide production), adaptive immunity (T-regulatory cell differentiation, autoimmune modulation), and mucosal defense. The co-occurring mushroom beta-glucans provide additional immunomodulatory activity through Dectin-1 receptor activation, creating synergistic immune benefits beyond isolated Vitamin D.

Supported by Trial 1

Bone health and musculoskeletal support

Vitamin D is essential for calcium and phosphorus absorption required for bone mineralization, and for muscle function that prevents falls in aging populations. Earthlight® provides the clinically validated bone and muscle benefits of Vitamin D supplementation in a plant-based whole food format acceptable for vegan, vegetarian, and clean-label product positioning.

Supported by Trial 1

Mechanism of action

1

Vitamin D2 nuclear receptor activation and calcium homeostasis

Vitamin D2 (ergocalciferol) from Earthlight® undergoes hepatic 25-hydroxylation to 25(OH)D2, then renal 1α-hydroxylation to 1,25(OH)2D2 (calcitriol equivalent), which binds the Vitamin D nuclear receptor (VDR) to regulate expression of over 1,000 genes governing calcium absorption (TRPV6, calbindin), immune function (cathelicidin, defensins), cell differentiation, and inflammatory modulation. While D3 may achieve slightly higher 25(OH)D levels per dose, D2 provides clinically relevant vitamin D activity with equivalent supplementation at equivalent doses.

Clinical trials

1
UV-Treated Mushroom Vitamin D2 vs D3 — Bioequivalence Study

Clinical study comparing UV-treated mushroom-derived Vitamin D2 supplementation vs Vitamin D3 (cholecalciferol) for serum 25(OH)D status improvement in vitamin D-insufficient adults. (or related Holick group studies)

Vitamin D-insufficient adults.

UV-treated mushroom Vitamin D2 improved serum 25(OH)D levels vs control. Note: while D2 raises serum 25(OH)D2, the broader scientific consensus is that D3 (cholecalciferol) is more effective than D2 (ergocalciferol) at raising and maintaining total 25(OH)D levels (multiple pooled analyses, including, AJCN). Mushroom D2 is preferred by vegan formulators but is not bioequivalent to D3 on a unit-for-unit basis.

Side effects and drug interactions

Common Potential side effects

Mushroom food ingredient — excellent safety profile
Mushroom allergy (rare) — discontinue if reaction
Vitamin D toxicity not a concern at food/supplement doses; only at very high supplementation (>10,000 IU/day chronic)

Important Drug interactions

Thiazide diuretics — Vitamin D may increase calcium; monitor
Corticosteroids — long-term use impairs Vitamin D metabolism; supplementation more important
No significant interactions at standard supplement doses

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Frequently asked questions about Earthlight® (Whole Food Mushroom Vitamin D2)

What is Earthlight?

Earthlight® (PLT Health Solutions) is a whole food Vitamin D ingredient derived from UV-treated white button mushrooms (Agaricus bisporus) that provides plant-based Vitamin D2 in its natural food matrix — complete with the cofactors, fiber, beta-glucans, and phytonutrients present in whole mushrooms.

What is Earthlight used for?

Earthlight is researched primarily for Immune Support and Bone Health. Earthlight® provides Vitamin D in its natural food matrix — the only plant-sourced whole food Vitamin D commercially available.

What is the recommended dosage of Earthlight?

The clinically studied dose is 250–1000 IU Vitamin D2 equivalent per serving as Earthlight®; dosing equivalent to 25–100 mg Earthlight® mushroom powder; adjust to achieve target serum 25(OH)D levels (50–80 ng/mL optimal range) Always follow the product label and check with a healthcare provider for personal advice.

Is Earthlight safe, and does it have side effects?

For most healthy adults, Earthlight is well tolerated at studied doses. Reported effects can include: Mushroom food ingredient — excellent safety profile Mushroom allergy (rare) — discontinue if reaction It may also interact with some medications. Earthlight is not right for everyone, so check with a healthcare provider first if you are pregnant or breastfeeding, have a medical condition, or take prescription medication.

Does Earthlight interact with any medications?

Possible interactions include: Thiazide diuretics — Vitamin D may increase calcium; monitor Corticosteroids — long-term use impairs Vitamin D metabolism; supplementation more important If you take prescription medication, check with a pharmacist or doctor before using it.

How strong is the scientific evidence for Earthlight?

NutraSmarts rates the evidence for Earthlight as Moderate (3 out of 5). It is backed by 1 clinical trial and 3 cited references summarized on this page. A higher rating reflects more, larger, and better-designed human studies.

References(3 citations)

Evidence ratings on NutraSmarts are based on the totality of human clinical research, with emphasis on randomized controlled trials, meta-analyses, and systematic reviews. The references below directly support claims made throughout this page.

  1. Urbain P, Singler F, Ihorst G, Biesalski HK, Bertz H Bioavailability of vitamin D2 from UV-B-irradiated button mushrooms in healthy adults deficient in serum 25-hydroxyvitamin D: a randomized controlled trial. Eur J Clin Nutr. 2011;65(8):965-71. doi: 10.1038/ejcn.2011.53.PubMedUsed to support: RCT (n=26, 5 weeks) demonstrating that UV-B-irradiated button mushrooms providing 28,000 IU/week of vitamin D2 raised serum 25-hydroxyvitamin D as effectively as a vitamin D2 supplement; directly validates Earthlight's UV-treated mushroom vitamin D2 bioavailability for immune and bone health.
  2. Martineau AR, Jolliffe DA, Hooper RL, Greenberg L, Aloia JF, Bergman P, Dubnov-Raz G, Esposito S, Ganmaa D, Ginde AA, Goodall EC, Grant CC, Griffiths CJ, Janssens W, Laaksi I, Manaseki-Holland S, Mauger D, Murdoch DR, Neale R, Rees JR, Simpson S Jr, Stelmach I, Kumar GT, Urashima M, Camargo CA Jr Vitamin D supplementation to prevent acute respiratory tract infections: systematic review and meta-analysis of individual participant data. BMJ. 2017;356:i6583. doi: 10.1136/bmj.i6583.PubMedUsed to support: Landmark meta-analysis of 25 RCTs (n=10,933) showing vitamin D supplementation significantly reduced acute respiratory tract infection risk (aOR 0.88); directly supports immune function support claim for Earthlight® vitamin D2.
  3. Bischoff-Ferrari HA, Willett WC, Wong JB, Giovannucci E, Dietrich T, Dawson-Hughes B Fracture prevention with vitamin D supplementation: a meta-analysis of randomized controlled trials. JAMA. 2005;293(18):2257-64. doi: 10.1001/jama.293.18.2257.PubMedUsed to support: Meta-analysis of 12 RCTs showing 700-800 IU/day vitamin D supplementation reduced hip fracture risk by 26% and nonvertebral fracture risk by 23% in older adults; directly supports bone health and musculoskeletal support claim for Earthlight® vitamin D2.