Aquamin F
Also known as: Lithothamnion sp., marine algae calcium, seaweed-derived calcium, Lithothamnion calcareum, multimineral seaweed extract
Effective Dosage
2400 mg/day based on available study data
What the Science Says
Aquamin F is a multimineral supplement derived from the marine red algae Lithothamnion sp., naturally rich in calcium (around 32%) plus over 72 trace minerals from its oceanic origin. Early clinical research suggests it may support calcium metabolism more effectively than standard calcium carbonate, producing longer-lasting suppression of parathyroid hormone (PTH) after meals in premenopausal women. A small pilot study in people with knee osteoarthritis found that 2400 mg per day over 12 weeks improved walking distance and range of motion compared to placebo during partial NSAID withdrawal, though pain scores did not significantly differ.
What It Doesn't Do
Not proven to treat or reverse osteoarthritis — the joint study was tiny and showed no improvement in pain scores. Don't expect it to replace your prescribed medications. No evidence it builds bone density long-term. The trace mineral content sounds impressive but there's no proof those extras do anything meaningful at these doses. Not a substitute for a balanced diet.
Evidence-Based Benefits
Aquamin F is a marine-derived mineral complex primarily composed of calcium and magnesium, which may support joint health and bone density. Some clinical trials suggest it can improve joint function and reduce discomfort in individuals with osteoarthritis.
Moderate EvidenceEffective at: No established dose
Source: auto-research
Absorption & Bioavailability
Good — in vitro digestion testing showed Aquamin F (calcium-rich) dissolves well during gastric and intestinal phases, and the calcium metabolism study showed greater urinary calcium clearance compared to calcium carbonate, suggesting efficient absorption.
Red Flags to Watch For
- All clinical evidence comes from very small pilot studies (12–22 participants); results need confirmation in larger trials before drawing firm conclusions.
- The osteoarthritis study involved gradual NSAID withdrawal — do not attempt to reduce prescribed pain medications without medical supervision.
- Tolerability data is limited to a 12-week window in a small cohort of older adults; long-term safety beyond this period is not established from the provided studies.
- Over 1,000 supplement products contain this ingredient, but the clinical evidence base is extremely thin — widespread commercial use far outpaces the research.
Products Containing Aquamin F
See how Aquamin F is used in these analyzed products:
Research Sources
- PubMed
- NIH DSLD
This information is for educational purposes only and is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Last updated: 2026-04-06