Geri-Care Oyster Shell Calcium with Vitamin D3, 250 mg Tablets, 100 Unit Dose

Geri-Care Oyster Shell Calcium with Vitamin D3, 250 mg Tablets, 100 Unit Dose, categorized under Vitamins & foundational micronutrients in the Supplements vertical. It is scored on the Vyvata Scoring Framework — an independent 6-dimension rubric applied uniformly to every product Vyvata lists.

55/100 overall — Standard tier (50–69 band). Per-dimension breakdown: Evidence 58, Manufacturing 58, Transparency 58, Safety 55, Sustainability 55, Formulation 48. Scored as of 2026-08-24.

Geri-Care is an institutional/long-term-care packaging brand, and this is oyster-shell calcium carbonate 250 mg with a token amount of D3. Calcium carbonate requires stomach acid for dissolution — a real absorption issue in the older adult / PPI-user population this format targets — versus calcium citrate which is absorbed independent of pH. Dose is low (250 mg is one-quarter of many adult targets, so multiple tablets required to reach the 800–1200 mg daily range), and Bolland 2010 BMJ meta-analysis raised cardiovascular concerns with high-dose calcium supplementation. Oyster-shell sources historically have variable lead content (need per-lot heavy-metal testing). Would move to Verified with calcium citrate form, K2-MK7 for arterial-calcium partitioning, and published heavy-metal COAs.

Strongest: Evidence at 58/100 (quality of published RCT support for the active ingredients at the label dose) and Manufacturing at 58/100 (third-party testing, GMP compliance, and facility audit status). Weakest: Sustainability at 55/100 (sourcing practices, packaging, and corporate practice) and Formulation at 48/100 (dose adequacy, bioavailability form, and ingredient redundancy). All six dimensions feed the overall Vyvata score; a weakness on any one dimension pulls the overall down proportionally.

No third-party certifications (NSF, USP, ConsumerLab, or equivalent) were on record at the time of scoring. This affects the Manufacturing dimension score. The manufacturer may test internally or have obtained certification more recently — check the current product label for the most up-to-date information.

Would move to Verified with calcium citrate form, K2-MK7 for arterial-calcium partitioning, and published heavy-metal COAs.

The top-ranked vitamins & foundational micronutrients product in the Vyvata catalog is currently Thorne Basic Nutrients 2/Day at 89/100. See the full ranked list of 635 scored products in this subcategory at https://vyvata.com/pages/best-vitamins-and-foundational-micronutrients-supplements-ranked.

The Vyvata Scoring Framework rates every listed product 0–100 across six dimensions: Evidence, Formulation, Manufacturing, Safety, Transparency, and Sustainability. Tier bands: Elite 85–100 (top-tier evidence + formulation + manufacturing), Verified 70–84 (strong on most dimensions), Standard 50–69 (solid but with weaknesses called out), Rejected 0–49 (specific failures documented). Rejected products remain listed with reasons. Full methodology at https://vyvata.com/pages/methodology.

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