Among university students in Jordan, lower dairy calcium intake is linked to higher depression scores, even when accounting for sleep problems, anxiety, and body pain, hinting that calcium may have a unique role in mood regulation.
Evidence from Studies
No evidence studies found yet.
What Would Prove This
Per GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this claim, ordered from strongest to weakest.
Whether calcium supplementation consistently reduces depressive symptoms in young adults with low dietary intake, independent of sleep or anxiety changes.
A systematic review and meta-analysis of RCTs testing calcium supplementation (≥1000 mg/day) versus placebo for 8–16 weeks in adults aged 18–25 with baseline calcium intake <800 mg/day and elevated depression scores (HADS ≥11), measuring HADS-depression as primary outcome while controlling for sleep and anxiety changes.
Whether increasing dairy calcium intake directly reduces depressive symptoms in young adults with low intake, independent of changes in sleep or anxiety.
A double-blind RCT of 150 university students aged 18–24 with low calcium intake (<800 mg/day) and elevated depression (HADS ≥11), randomized to 1000 mg/day calcium via dairy or placebo for 12 weeks, with primary outcome being change in HADS-depression score, while controlling for ISI and HADS-anxiety changes.
Whether low dairy calcium intake predicts the development of depression in young adults over time, independent of insomnia and anxiety.
A prospective cohort study following 1000 university students aged 18–22 for 2 years, measuring dairy calcium intake quarterly and assessing incident depression (HADS ≥11) at 12 and 24 months, adjusting for baseline ISI, HADS-anxiety, BMI, and academic stress.
Whether individuals with depression have a history of lower dairy calcium intake compared to matched controls without depression.
A case-control study comparing dairy calcium intake in the prior 6 months among 200 university students with depression (HADS ≥11) and 200 matched controls (HADS ≤7), using validated food frequency questionnaires and controlling for insomnia severity, anxiety, and pain.
Whether low dairy calcium intake and depression co-occur in a population at a single point in time.
A cross-sectional survey of 1000 university students measuring dairy calcium intake and HADS-depression simultaneously using validated tools, as performed in this study.