Softgel (or soft gel) capsules are a widely used pharmaceutical and nutraceutical dosage form for delivering various nutrients, including calcium, to support or treat calcium deficiency. The use of softgel capsules for calcium supplementation is justified by scientific validation rather than tradition. Softgel technology offers several advantages over traditional tablet or powder forms, including improved bioavailability, enhanced stability, and ease of swallowing, particularly for individuals who have difficulty taking large tablets. Calcium, when formulated in a softgel, is often combined with other ingredients such as vitamin D or magnesium to further enhance absorption and efficacy.

Numerous studies have demonstrated that the absorption of fat-soluble vitamins and certain minerals can be improved when delivered in softgel form, primarily due to the presence of oil-based vehicles that facilitate better gastrointestinal uptake. While the specific improvement in calcium absorption via softgels compared to other forms may vary depending on the compound used (e.g., calcium carbonate, calcium citrate), the softgel formulation is recognized as an effective, patient-friendly method for delivering calcium to address deficiencies. Regulatory agencies and clinical guidelines also acknowledge calcium softgels as a legitimate option for supplementation. However, the core efficacy lies in the calcium compound itself, not the softgel format; the softgel mainly improves patient compliance and, in some cases, absorption.