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Doctor's Best Vitamin D3, 125 mcg (5,000 IU), 360 Softgels bottle
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Doctor's Best Vitamin D3, 125 mcg (5,000 IU), 360 Softgels Review

Doctor's Best Vitamin D3 formula provides this essential sunshine nutrient, promoting overall health when dietary intake and sun exposure are limited. Cholecalciferol, known as Vitamin D3, plays a key role in supporting a healthy immune system, heart function, and maintaining strong bones.

Product Focus: TeethAlso graded for:EnergyBlood SugarHealthy AgingThyroid HealthAlso covers:Bones
Tier ⓘ
Members
Members see this product's tier and why. Tiers run from 1, the strongest evidence, to 5. How we grade →
Evidence ⓘ
Members
How strongly the evidence says this product works: human studies count most, then real reviews, then our biohacker panel.
Positive Reviews
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Biohacker Mentions
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Cost per month
$1
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Study, Trial or Testing Result Summary

MembersHuman studies

2 of these 27 human studies gave vitamin d by injection, not by mouth.

This product gives 125 micrograms of vitamin D3 a day, a dose and the 1,000 units that in some studies. It is also the daily upper limit, so members can take if they prefer. …

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Review Totals and Summary

Members100,149 reviews
100,149 reviews · IHerb 74,172 · Amazon 25,944 · Walmart 30 · Sprouts 3

Customers generally have a very view of Doctor's Vitamin D3 softgels, with over 100,000 ratings across various stores, of which are 4 or 5 stars where star ratings are provided. This summary focuses exclusively on the softgel form of the product, excluding reviews for other formats like gummies or capsules. **What Buyers Say It Did For Them** users report from taking these Vitamin D3 softgels. …

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Biohacker Summary

MembersWhat our biohacker panel says

Vitamin D3 is the main ingredient here, and ten panelists spoke about it: five it, two use it, and two stay , with the tenth, whose latest position is also a , adding it to a bare-minimum routine. take it for general , immune support, mood and brain function, and bone , and point out that people are in it, especially those who spend their days indoors. …

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RAL Summary

MembersThe tier and why

Vitamin D is at a dose, and a pooled analysis of 2,827 children linked supplements to about half the rate of tooth decay, supported by lost teeth in older adults, though other trials found .

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More Details

MembersBody systems · Combine with · Possible side effects

Body systems: Mouth and teeth, Skeletal system. Combine with and possible side are for members.

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Supplement Facts

Vitamin D3 125 mcg
Supplement Facts
Serving Size 1 Softgel
Servings Per Container 360
Amount Per Serving% Daily Value
Vitamin D3 (as cholecalciferol)125 mcg625%

Other ingredients: Extra virgin olive oil, softgel capsule (gelatin, glycerin, purified water).

Directions: Suggested Adult Use: Take 1 softgel daily with food, or as recommended by a nutritionally informed physician.

Barcode (UPC) 753950002500 · Label source: Doctorsbest · Report a label change

Where to Buy

Doctor's Best · iHerb · Walmart
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Our articles on this subject

Graded October 23, 2026 by the Reverse Age Lab evidence engine, from human studies, real reviews and our biohacker panel. How we grade. Is this medical advice? No. Rala organizes the published evidence; go over any change with your doctor, especially if you take meds.