BioStacks
Best for
Ingredients (1)
Vitamin D
100%Dose
4000 IU
Target
1000–5000 IU
Form
Premium
Other Ingredients (5)
MaltodextrinBinder
Spikes blood sugar faster than table sugar (glycemic index 85–105). Research links it to gut bacteria changes that may promote intestinal inflammation (Nickerson et al. 2015). Used as a cheap filler — adds nothing beneficial.
Silicon DioxideAnti-caking
Fine silica powder used to prevent clumping
Magnesium StearateLubricant
A salt of stearic acid used as a lubricant in tablet and capsule production
Coating (unspecified)Coating
Generic tablet coating declaration where the label does not itemize the coating's components; modern aqueous film coatings are typically cellulose-based (HPMC) with a plasticizer
Microcrystalline CelluloseBinder
Plant-derived cellulose used as a binder and filler in supplements
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
ONE TABLET PER DAY. Ultra Vitamin D may be used for as long as required. Swallow with water or a cold drink. Not to be chewed. Do not exceed the recommended intake. For use under guidance of your health professional. Suitable for vegetarians No lactose No yeast No preservatives or artificial colours Ultra is not tested on animals
General guidance based on the ingredients, not a substitute for the label or your doctor.
Price Check
£14.95≈ $18.99
Near the median of 632 vitamin D supplements
Track this supplement in your stack
Get personalized insights, interactions, and coverage recommendations.
Get Started FreeSimilar Supplements
Sources & Scoring
Nutrient data (RDA, UL, and safety thresholds) sourced from: NIH Office of Dietary Supplements and 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. clinical 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.