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WELLNESSWEEK
Vitamin D3 2500 IU
Regular price
$46.00
Vitamin D, often referred to as the "sunshine vitamin," is a crucial micronutrient that supports calcium absorption, strong bone development, and a healthy immune system. For individuals with limited sun exposure, such as during winter months, or those looking to minimize the risks of UVA and UVB exposure, our Sports Research Vitamin D3 formula provides the same biologically active form of vitamin D that the body produces from sunlight. Additionally, since D3 is most effective when taken with a fat, we have included coconut MCT oil in our softgels to ensure optimal absorption.
TAKE 1 SOFTGEL DAILY WITH A FAT-CONTAINING MEAL
D3 is fat-soluble — it is absorbed alongside dietary fats. The built-in coconut MCT oil carrier provides a fat source even on an empty stomach, but taking with a meal further enhances absorption. Consistent daily use is essential: D3 levels build gradually over 2–3 months of supplementation before stabilising.
Organic Coconut Oil (MCT), Softgel Capsule (Gelatin, Glycerin, Purified Water).
Store at room temperature, in a dry place. Protect product from excessive heat, freezing, humidity and light.
We offer free shipping on orders over $95. Orders processed in United States and Canada will take 1-2 business days to arrive. Delivery details will be provided in your confirmation email.
Regular price
$46.00
Vitamin D, often referred to as the "sunshine vitamin," is a crucial micronutrient that supports calcium absorption, strong bone development, and a healthy immune system. For individuals with limited sun exposure, such as during winter months, or those looking to minimize the risks of UVA and UVB exposure, our Sports Research Vitamin D3 formula provides the same biologically active form of vitamin D that the body produces from sunlight. Additionally, since D3 is most effective when taken with a fat, we have included coconut MCT oil in our softgels to ensure optimal absorption.
TAKE 1 SOFTGEL DAILY WITH A FAT-CONTAINING MEAL
D3 is fat-soluble — it is absorbed alongside dietary fats. The built-in coconut MCT oil carrier provides a fat source even on an empty stomach, but taking with a meal further enhances absorption. Consistent daily use is essential: D3 levels build gradually over 2–3 months of supplementation before stabilising.
Organic Coconut Oil (MCT), Softgel Capsule (Gelatin, Glycerin, Purified Water).
Store at room temperature, in a dry place. Protect product from excessive heat, freezing, humidity and light.
We offer free shipping on orders over $95. Orders processed in United States and Canada will take 1-2 business days to arrive. Delivery details will be provided in your confirmation email.
✦ HEALTH CHOICE
BONE HEALTH & immune defence
VITAMIN D3
2500 IU
240 SOFTGEL · EXTRA STRENGTH · 240 SERVINGS
3RD PARTY TEST
NON-GMO
NSF GLUTEN-FREE
CGMP
The silent deficiency
The world's most common nutrient gap.
1B+
People worldwide estimated to be deficient in vitamin D
200+
Genes in the body regulated by vitamin D receptors
42%
Of US adults have insufficient vitamin D levels
120
Softgels per bottle — a full 4-month supply at 1 per day
WHAT D3 DOES
One vitamin. Countless roles.
BONE DENSITY
Vitamin D3 is essential for calcium absorption in the gut. Without adequate D3, calcium passes through the body unused — leading to progressive bone thinning regardless of how much calcium you consume. D3 is the gatekeeper of skeletal health.
IMMUNE DEFENCE
D3 activates the production of antimicrobial proteins, supports T-cell function, and modulates inflammatory response. Clinical studies show supplementation can reduce the incidence of upper respiratory infections and autoimmune activity by up to 22%.
MUSCLE FUNCTION
Vitamin D receptors are found throughout muscle tissue. Deficiency is directly linked to muscle weakness, slower recovery, and reduced athletic performance. Adequate D3 supports type II muscle fibre function — the fibres responsible for power and strength.
MOOD & MENTAL HEALTH
D3 regulates serotonin synthesis and modulates dopamine pathways. Low D3 is consistently associated with depression, anxiety, and seasonal mood disorders. Supplementation during low-sunlight months provides measurable mood stabilisation.
CARDIOVASCULAR HEALTH
Vitamin D receptors are present in heart and vascular tissue. D3 helps regulate blood pressure, reduces arterial stiffness, and supports healthy cholesterol metabolism. Deficiency is an independent risk factor for cardiovascular events.
HORMONAL BALANCE
D3 functions as a steroid hormone precursor. It supports testosterone production, insulin sensitivity, and thyroid regulation. For men and women alike, D3 is foundational to healthy hormonal function across every stage of life.
What's inside
Supplement facts. Total transparency.
Supplement Facts
Serving Size: 1 Softgel
· Servings Per Container: 120
Calories 5
Total Fat
0.5g
1%*
Saturated Fat
0.5g
3%*
Trans Fat
0g
Vitamin D3 (as Cholecalciferol)
250 mcg (10,000 IU)
1,250%*
* Percent Daily Values based on a 2,000 calorie diet.
Other Ingredients:
Organic Coconut Oil (MCT), Softgel Capsule (Gelatin, Glycerin, Purified Water).
No fillers. No artificial flavors. No unnecessary additives.
Form matters
Cholecalciferol (D3) vs Ergocalciferol (D2)
There are two supplemental forms of Vitamin D — D2 (plant-derived, often in cheap supplements) and D3 (cholecalciferol, identical to what your skin makes from sunlight). Studies show D3 raises serum 25(OH)D levels approximately 87% more effectively than D2 and has a longer half-life in the bloodstream. D3 is the only form that counts.
Dosage
Why 10,000 IU? Understanding max potency
The standard daily reference intake of 600–800 IU is widely considered insufficient for maintaining optimal serum levels. The Endocrine Society recommends 1,500–2,000 IU minimum for sufficiency; many clinicians target 4,000–10,000 IU for deficient individuals. At 10,000 IU per softgel, you have precise control to personalise your dose — take every day or every other day based on your needs and bloodwork.
Synergy
D3 works best alongside K2
Vitamin D3 dramatically increases calcium absorption. Vitamin K2 (MK-7) ensures that calcium is directed to bones and teeth — not arteries. If you're taking high-dose D3, pairing it with K2 is the clinically recommended approach to protect cardiovascular health while maximising bone benefit. Consider our Vitamin D3 + K2 for the complete formula.
Suggested use
Take 1 softgel daily with a fat-containing meal. D3 is fat-soluble — it is absorbed alongside dietary fats. The built-in coconut MCT oil carrier provides a fat source even on an empty stomach, but taking with a meal further enhances absorption. Consistent daily use is essential: D3 levels build gradually over 2–3 months of supplementation before stabilising.
FROM SOFTGEL TO CELL
How your body uses D3.
Vitamin D3 undergoes a two-step activation process before it becomes biologically active — understanding this helps you take it optimally.
Ingestion
D3 absorbed in small intestine alongside MCT oil carrier
Liver
Converted to 25-hydroxyvitamin D — your measured serum level
Kidneys
Activated to 1,25-dihydroxyvitamin D (calcitriol) — biologically active form
Cell receptors
Binds to Vitamin D receptors in 200+ genes, bone, immune & muscle tissue
Verified Reviews
Based on 8,000+ verified purchases
Top-rated Vitamin D3 supplement
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Bloodwork confirmed it
My D3 level was 18 ng/mL severely deficient. Three months on this and I'm at 62 ng/mL. My doctor was impressed. Energy, sleep, and mood are all noticeably better.
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Easiest softgel I've ever swallowed
I've tried hard tablets and they're always rough going down. These tiny softgels are effortless no taste, no aftertaste, no issues.
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Part of my foundation stack daily
Running the full Health stack creatine, omega-3, and D3. The value for 120 softgels is unbeatable. Four months of protection for under $12 on subscribe. No brainer.