BioStacks
Best for
Ingredients (8)
Vitamin D
100%Dose
1000 IU
Target
1000–5000 IU
Form
Premium
Calcium
100%Dose
800 mg
Target
200–600 mg
Form
Not listed
Magnesium
100%Dose
300 mg
Target
100–400 mg
Form
Not listed
Zinc
67%Dose
10 mg
Target
15–30 mg
Form
Not listed
Selenium
55%Dose
55 mcg
Target
100–200 mcg
Form
Not listed
Other Ingredients (5)
Sodium BorateBuffer
Classified as a Substance of Very High Concern (SVHC) under EU REACH for reproductive toxicity (Category 1B — may damage fertility and the unborn child). EFSA's tolerable upper intake from total boron exposure is 10 mg/day for adults; sodium borate dosing must stay well below this. Acute oral toxicity is moderate (lethal dose ~5–20 g in adults), but the chronic-exposure reproductive endpoint is the binding constraint. Largely phased out of modern supplements and personal care in favor of safer buffers (citrate, phosphate). If a current product lists sodium borate, the inclusion warrants scrutiny — there are safer alternatives for every excipient function it provides.
Silicon DioxideAnti-caking
Fine silica powder used to prevent clumping
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
StarchBinder
Carbohydrate polymer used as a binder, filler, and disintegrant in tablets and capsules
How to Take It
Best taken in the evening
The Magnesium in it is what pulls this toward the evening. Take it with a meal containing fat — the vitamin D in it absorbs poorly without one.
With a meal containing fat
Keep it away from high-oxalate foods like spinach
Space it a couple of hours from Iron
On the label
TWO TABLETS PER DAY WITH YOUR MAIN MEAL. Swallow with water or a cold drink. Not to be chewed. Do not exceed the recommended intake. Osteocare can be continued for as long as required. Suitable for vegans & vegetarians Free from gluten, lactose, yeast, preservatives, drugs & hormones No artificial colourants. Other calcium tablets may be coated with added colourants. Osteocare is not tested on animals
General guidance based on the ingredients, not a substitute for the label or your doctor.
Price Check
£5.45≈ $6.92
Cheaper than 94% of 632 vitamin D supplements
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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.