Nutrient quality
Several minerals use useful citrate or chelated forms and fit bone support well. The implausible vitamin D unit, mixed lower-quality mineral forms, and weak horsetail disclosure create major quality concerns.
Analysis
Calcium carbonate with citrate malate provides a large calcium serving, while magnesium citrate is paired with lower-absorption magnesium oxide. Vitamin K2 and boron citrate fit the bone-focused design, although the boron amount is modest.
Horsetail powder contributes little assessable value because the species, plant part, silica content, and extract yield are not stated. Lysine adds another relevant component, but its amount is small beside the minerals.
Most ingredients have specific amounts, yet the vitamin D entry is shown in milligrams rather than the expected much smaller unit and should not be assumed correct. Value is reasonable for a long-supply bone formula, but the label inconsistency and uneven ingredient strength remain important drawbacks.
Pros
Combines calcium with magnesium and vitamin K2 Uses calcium citrate malate and magnesium citrate Includes boron citrate
Cons
Also relies on calcium carbonate and magnesium oxide Horsetail lacks species and silica standardization Vitamin D unit in the supplied data appears unreliable
Warnings
Do not rely on the listed vitamin D amount until its unit is verified on the current package. Vitamin K2 can interfere with warfarin management and should be kept consistent under medical guidance. Calcium and magnesium can reduce absorption of levothyroxine and some antibiotics unless doses are separated.