Aquamin™ Marine Calcium: Source, Benefits & Dose

[ 01 ] Key Facts

Dose in element3	element3 Rise: 200mg
Form	Aquamin™: marine-sourced calcium from red algae (Lithothamnion); naturally contains 74 trace minerals including magnesium, strontium, and boron
Signs you may need more	Bone density concerns, muscle cramps, brittle nails, dental problems, tingling in extremities
Safe range	1,000mg/day RDI for adult women (total calcium from all sources). Upper intake level 2,500mg/day. Aquamin™ is well-tolerated with fewer GI side effects than calcium carbonate.

Food sources

Dairy products
Fortified plant milks
Sardines (with bones)
Kale

[ 02 ] Rationale

Why this ingredient is in element3

Calcium is the most abundant mineral in the human body, with approximately 99% stored in bones and teeth. The remaining 1% circulates in blood and tissues where it is essential for muscle contraction, nerve signalling, blood clotting, and enzymatic reactions. When dietary calcium is insufficient, the body withdraws it from bones to maintain these critical functions, gradually compromising skeletal integrity. This is why calcium intake is not optional; it is a daily requirement.

Aquamin™ is not ordinary calcium. Harvested from the skeletal remains of red algae (Lithothamnion species), it contains calcium in a porous, honeycomb-like mineral matrix with a larger surface area than the dense crystalline structure of calcium carbonate, which supports dissolution and absorption. But what truly distinguishes Aquamin™ is the 74 additional trace minerals it naturally contains — including magnesium, strontium, boron, zinc, and selenium — in the ratios and forms that occur in the marine environment. These trace minerals contribute to bone metabolism and may enhance calcium’s bioavailability and retention.

In element3 Rise, Aquamin™ at 200mg serves as the primary calcium foundation for bone health and cellular mineral support. This dose contributes 20% of the RDI as part of a comprehensive approach that relies on dietary calcium for the remainder. Aquamin™ works synergistically with Vitamin D3 (which enhances calcium absorption) and Vitamin K2 MK-7, which supports the body’s normal use of calcium in bone. The trace minerals naturally present in Aquamin™, particularly magnesium, strontium, and boron, further support the bone mineralisation process that these vitamins facilitate.

[ 03 ] Formulator's Notes

From the formulator

New Zealand women aged 31 to 50 average about 810mg of calcium a day against an RDI of 1,000mg. We set Rise at 200mg to close that gap without going so high that it competes with iron for absorption. And we chose a marine algae-derived calcium that's highly bioavailable and brings its own trace minerals.

Lucy Yang · Principal Food Technologist, element³

[ 04 ] At 35+

Relevant at 35+

Bone density begins to decline from the mid-30s, and the rate of loss accelerates dramatically during perimenopause and into menopause. Oestrogen directly stimulates osteoblast activity (bone formation), and as oestrogen levels fluctuate and eventually decline, the balance shifts toward net bone loss. Bone health becomes a more common focus for women through this stage of life, which is why a well-absorbed calcium source earns its place in element3 Rise.

The hormonal shifts of perimenopause also affect calcium absorption efficiency. Declining oestrogen reduces intestinal calcium absorption, meaning more calcium passes through the gut unused. This is why element3 Rise pairs calcium with D3 and K2: D3 counteracts the absorption decline, and K2 ensures what’s absorbed reaches the bones. Aquamin™’s porous structure supports absorption, which matters more through this stage.

Beyond bone health, calcium supports normal nerve and muscle function, which is part of why it sits in the morning formula.

[ 05 ] Your Questions

Your Questions

What is Aquamin™ calcium?

Aquamin™ is a marine-derived calcium complex harvested from red algae (Lithothamnion) off the coast of Iceland. Unlike calcium carbonate, it contains 74 naturally occurring trace minerals and has a porous structure that enhances bioavailability and digestive tolerance.

What form of calcium is in the element3 blend?

element3 Rise uses Aquamin™ — a marine-derived calcium from calcified red algae, rather than the calcium carbonate (ground limestone) or calcium citrate found in most supplements. This choice reflects both bioavailability and tolerability advantages: Aquamin™’s porous structure has a larger surface area than calcium carbonate, supporting better dissolution and absorption. It also brings 74 co-occurring trace minerals including magnesium, strontium, and boron that support bone health beyond calcium alone, mimicking more closely the multi-mineral matrix of bone tissue itself.

What are the benefits of taking Aquamin™ calcium?

Aquamin™ supports bone mineralisation through its calcium content alongside the 74 co-occurring trace minerals, particularly magnesium and strontium, that support bone matrix integrity beyond calcium alone. Research has demonstrated superior effects on bone cell activity and collagen production compared to calcium carbonate, likely due to its multi-mineral composition. It also supports normal muscle function and nerve signal transmission.

How much calcium do women over 35 need?

The RDI for adult women is 1,000mg/day (increasing to 1,300mg after 50). element3 provides 200mg of Aquamin™ calcium in element3 Rise, designed to complement the 700–800mg most women obtain from a balanced diet.

What are the benefits of Aquamin™ in the element3 protocol?

In element3 Rise, Aquamin™ at 200mg works within the bone health trio alongside Vitamin D3 (which enhances calcium absorption) and Vitamin K2 MK-7 (which directs absorbed calcium into bones rather than soft tissue). This coordinated approach to bone mineralisation addresses the full process: absorption, transport, and deposition.

What other Aquamin™ benefits have been found in clinical research?

Clinical research on Aquamin™ has demonstrated superior effects on osteoblast (bone-building cell) activity and collagen synthesis compared to calcium carbonate in cell and animal studies. Human research has shown improvements in bone flexibility and resistance to fracture with Aquamin™ supplementation. Its digestive tolerability is also well-documented, the porous algae structure dissolves more readily than calcium carbonate, producing fewer gastrointestinal side effects.

What is the recommended daily intake of calcium?

The recommended dietary intake for calcium is 1,000mg per day for adult women aged 19–50, rising to 1,300mg per day for women over 50. element3 Rise provides 200mg as Aquamin™ per serve, 20% of the adult RDI, designed as a supplementary contribution alongside dietary calcium rather than a standalone replacement. The upper intake level for calcium is 2,500mg per day; excessive supplemental calcium (particularly from calcium carbonate) without adequate K2 and D3 has been associated with cardiovascular calcification risk, which is why element3 Rise delivers calcium alongside K2 and D3.

What food provides calcium?

Calcium is most abundant in dairy products (milk, yoghurt, hard cheeses), canned fish with bones (sardines, salmon), tofu set with calcium, almonds, tahini, kale, and broccoli. Fortified plant milks provide calcium but often as calcium carbonate, which is less bioavailable than the calcium in dairy. Calcium absorption from food is significantly influenced by vitamin D status, another reason why pairing calcium (Aquamin™), D3, and K2 together in element3 Rise addresses the full absorption and utilisation chain rather than relying on calcium supplementation alone.

Are there any Aquamin™ calcium side effects?

Aquamin™ is well-tolerated in clinical research with a notably better gastrointestinal profile than calcium carbonate, which commonly causes constipation and bloating. At the 200mg dose in element3 Rise, side effects are not expected. The porous structure of Aquamin™ dissolves more readily in the stomach, reducing the GI discomfort associated with dense calcium carbonate tablets. Total daily calcium intake from all sources (diet plus supplementation) should stay within the 2,500mg upper limit; those with a history of kidney stones or hypercalcaemia should consult a healthcare practitioner.

What are calcium deficiency symptoms?

Calcium deficiency (hypocalcaemia) symptoms include muscle cramps and spasms (particularly in the legs and feet), tingling or numbness in the fingers and around the mouth, brittle nails, dental problems, and in significant deficiency, muscle tremors and irregular heartbeat. Long-term inadequate calcium intake can contribute to gradual bone density loss, which is often silent. This is why maintaining a good calcium intake through this stage of life matters.

Aquamin™ vs calcium carbonate — which is better?

Research indicates Aquamin™ has better bioavailability compared to calcium carbonate, with its porous mineral matrix and 74 trace minerals supporting more efficient absorption and bone mineralisation. It is also better tolerated digestively, causing fewer issues with bloating and constipation.

[ 06 ] The Research

1 study

The Research

Study	Key finding	Read
A natural mineral supplement provides relief from knee osteoarthritis symptoms: a randomized controlled pilot trialFrestedt, J. L., Walsh, M., Kuskowski, M. A., & Zenk, J. L. (2008). A natural mineral supplement provides relief from knee osteoarthritis symptoms: A randomized controlled pilot trial. Nutrition Journal, 7, 9. https://doi.org/10.1186/1475-2891-7-9	Aquamin® supplementation reduced WOMAC pain and stiffness scores in adults with osteoarthritis vs placebo over 12 weeks.	Read →

[ 07 ] In the Protocol

Where Calcium (as Aquamin™ Calcium, Marine Algae Lithothamnion sp.) sits in the element3 Protocol

In element3 Rise, Aquamin™ at 200mg provides marine-sourced calcium to support normal bone health, alongside Vitamin D3, which supports calcium absorption, and Vitamin K2 MK-7. Its 74 naturally occurring trace minerals contribute to the broader mineral picture, in a form chosen for absorption and digestive tolerability.

You can learn more about the full element3 ingredient philosophy at element3.co.nz.

Technically reviewed by

Lucy Yang

Principal Food Technologist, element³ · MFoodTech (Distinction), Massey University · BSc Applied Chemistry, Tongji University · NZIFST Young Technologist Award 2021

Lucy is a food technologist specialising in formulation, product development and the transfer of products from lab scale into full manufacturing. Across NPD and tech-transfer roles she has developed capsule and powdered beverage products, and her academic research has been published in international scientific journals. In 2026 she worked with Hannah and Sarah to develop Rise and Rest, bringing evidence-based formulation to every ingredient and dose.

Lucy advises element³ on formulation and technical matters. Her review is provided as part of that work.

Last reviewed 26 October 2026Full profile →LinkedIn →

Good to know

This page is for general education only. It is not medical advice and is not a substitute for advice from your doctor, pharmacist or other health professional. Dietary supplements should not replace a balanced diet. Always read the label and use only as directed. If symptoms persist, or you are pregnant, breastfeeding or taking medication, talk to your health professional before use.

Calcium (as Aquamin^™ Calcium, Marine Algae Lithothamnion sp.)