BioStacks
Best for
Ingredients (8)
Vitamin D
40%Dose
400 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
Copper
100%Dose
1000 mcg
Target
1000–2000 mcg
Form
Not listed
Zinc
67%Dose
10 mg
Target
15–30 mg
Form
Not listed
Other Ingredients (6)
SucraloseSweetener
Dose context matters. As a trace excipient in a tablet coating or capsule, the amount is minimal and not a meaningful concern. The evidence below applies to the gram-level intakes typical of sweetened protein powders, pre-workouts, and drink mixes: a 2022 human trial (Suez et al., Cell) showed sucralose disrupts gut bacteria and worsens blood sugar control in healthy adults, and a 2023 study (Schiffman et al.) found that sucralose-6-acetate — a compound formed when sucralose is digested — was genotoxic to human cells in vitro. It remains an artificial sweetener with no nutritional purpose.
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.
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.
SucroseSweetener
Added sugars and high glycemic load; dental caries risk
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
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
ADULTS: CHEW TWO TABLETS DAILY. CHILDREN (4-12 YRS): CHEW ONE TABLET DAILY. These chewable tablets are not designed to be swallowed whole. Do not exceed the recommended intake. Not recommended for children under 4 years of age. Suitable for vegetarians No preservatives, artificial colours or drugs & hormones No lactose or yeast Gluten free Osteocare is not tested on animals
General guidance based on the ingredients, not a substitute for the label or your doctor.
Price Check
£5.10≈ $6.48
Cheaper than 95% 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.