BioStacks
Natural Factors
Vitamin D3 25 mcg (1000 IU) Unflavored
Liquid · 0.03 M L · 500 servings · $0.03/serving
Best for
Ingredients (1)
Vitamin D3
100%Dose
1000 IU
Target
1000–5000 IU
Form
Premium
Other Ingredients (3)
Medium Chain Triglyceride OilCarrier
Fractionated oils rich in C8/C10 triglycerides used as neutral carrier or anti-sticking agent
Flaxseed OilCarrier Oil
Flaxseed (linseed) oil, an ALA omega-3 source used as a softgel carrier oil
Mixed TocopherolsAntioxidant
Natural vitamin E used as preservative
How to Take It
Take it anytime
Fat-soluble — take with your largest fat-containing meal. Time of day doesn't matter.
With a meal containing fat
On the label
For Adults Invert bottle and allow 1 drop (0.03 ml) to flow out onto a spoon, or mix with food or liquids. 1 drop per day or as directed by a health professional. Shake well before use.
General guidance based on the ingredients, not a substitute for the label or your doctor.
Price Check
$13.97
Near the median of 552 vitamin D supplements
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Sources & Scoring
Nutrient data (RDA, UL, and safety thresholds) sourced from the NIH Office of Dietary Supplements and the National Academies Dietary Reference Intakes (DRI).
This is not medical advice. Consult a healthcare provider before making changes to your supplement routine.
The score analyzes what's on the label: ingredient doses vs. studied ranges, chemical forms, evidence levels, and known interactions. It does not verify label accuracy or test for contaminants — for that, look for third-party certifications like USP or NSF.