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

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.

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.

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.

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.

1
Mushroom-Derived Vitamin D2 and Serum 25(OH)D — Clinical Comparison
PubMed

Clinical study comparing UV-treated mushroom Vitamin D2 supplementation vs. control for serum Vitamin D status improvement.

Vitamin D insufficient adults. Clinical bioavailability study.

UV-treated mushroom Vitamin D2 significantly improved serum 25(OH)D levels vs. control, with comparable bioavailability to commercial Vitamin D2 supplements. Whole food matrix well-tolerated. Provides clinically relevant Vitamin D supplementation from a plant-based whole food source.

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