Everwild Sea Mineral Matrix: What It Is and Why It Matters

Seaweed has a reputation for being a bit of a wild card. Mineral content shifts from species to species, and iodine content shifts even more. When we set out to build a marine mineral base for our women's wellness formulas, we wanted the opposite of a wild card: a blend made from whole plants, with every number we care about written down and tested. That blend is the Everwild Sea Mineral Matrix™, and this post walks through what is in it, why we built it the way we did, and how we think about the evidence behind it.

The idea: the sea as an original mineral broth

Marine plants have been drawing magnesium, calcium, potassium and a long list of trace minerals out of seawater for a very long time, and weaving them into living tissue. Our starting point was simple: if we want sea-sourced minerals, we should take them the way the sea packages them, in whole plants, rather than stamping out isolated mineral salts in a lab.

That is where the word "Matrix" comes from. In a living seaweed, minerals sit alongside fibers, pigments and cofactors. We keep our ingredients whole and let them work in concert, the way the ocean assembled them. Across the Tide Line you will also see the Matrix called Everwild SeaMatrix™, which is the trademark-pending name for the same shared marine mineral base.

Five whole botanicals, 440 mg

A full daily serving of the Matrix is 440 mg and contains five whole marine botanicals:

• Purple Sea Moss (Chondrus crispus), 150 mg. A red alga and the mineral-rich base of the blend. It provides marine-sourced trace minerals.*
• Lithothamnion (Aquamin F), 140 mg. A calcified red algae that provides marine-sourced calcium and magnesium.*
• Sea Lettuce (Ulva lactuca), 100 mg. A green alga that provides low-iodine marine trace minerals, including naturally occurring iron and magnesium.*
• Nori (Porphyra / Pyropia species), 40 mg. A red alga that provides marine trace minerals and polysaccharides, and adds to the diversity of the mineral spectrum.*
• Fucorich Mekabu 65% (Undaria pinnatifida sporophyll), 10 mg. A single, low-dose brown seaweed extract (about 10:1) that provides fucoidan.*

Notice that the blend is built mainly from red and green algae. Mekabu is the one brown-seaweed input, and we keep it small on purpose.

Why iodine restraint is part of the design

Iodine is an essential nutrient, and the body uses it to make thyroid hormones. It is also a "just enough" nutrient: both too little and too much can affect normal thyroid function. Sea vegetables are naturally rich in iodine, and the amount varies widely between seaweeds and between harvests. Published work on commercially available edible seaweeds has documented that variability (Teas and colleagues, Thyroid, 2004), and the NIH Office of Dietary Supplements covers the basics of iodine and thyroid function in its fact sheet.

So we made restraint the point of the blend. Rather than leaning on the highest-iodine kelps, we built the Matrix from lower-iodine marine algae, and we designed a full 440 mg serving to deliver roughly 10 to 20 mcg of iodine. For context, the established reference values for adult women are 150 mcg per day (the RDA for women 19 and over) and 1,100 mcg per day as the Tolerable Upper Intake Level from all foods, water and supplements combined. A full Matrix serving is a small fraction of the first number and far below the second.

Here is the part we want to be plain about. The 10 to 20 mcg figure is a formulation design target, and it rests on our own finished-blend testing, not on a published study. The iodine amount is disclosed on the Supplement Facts panel and confirmed by testing on each production lot, which is the release requirement for the blend. The published literature supports the general science behind the restraint (iodine is essential, seaweed iodine is variable, and excess can affect thyroid function). It does not tell you what is in our bottle. Our testing does.

The Matrix is not a thyroid product. We do not present it as being for, or safe for, any thyroid condition, and thyroid decisions belong with your own healthcare provider.

What the published sources say about the ingredients

We keep our ingredient statements to composition: what each botanical provides. Every one is graded against a published source, and where support is modest we say so.

• Lithothamnion. The calcium and magnesium source statement is the best supported. Published bioaccessibility and bioavailability data exist for this calcified red algae multimineral (Felice and colleagues, Nutrients, 2018). We keep the wording to "provides calcium and magnesium" and do not extend it to any finished-blend outcome.
• Purple Sea Moss. Reviews of edible seaweeds describe the mineral content of red algae (MacArtain and colleagues, Nutrition Reviews, 2007), and a risk assessment of iodine intake from red seaweeds including Chondrus crispus has been published (Darias-Rosales and colleagues, 2020). We grade this support as moderate, with dose and form caveats.
• Sea Lettuce and Nori. Both are long-documented edible seaweeds, and the support here is compositional and traditional rather than clinical. We grade it as limited.
• Mekabu. The statement is about identity: mekabu is the fucoidan-rich sporophyll of Undaria pinnatifida. We assert nothing beyond that.

Quality we can describe in specifics

• Species identity confirmed for each marine ingredient (for example, by FT-IR).
• A batch-specific Certificate of Analysis for every raw-material lot and for the finished blend.
• Iodine measured on the finished blend for every production lot.
• Heavy-metal screening for arsenic, cadmium, lead and mercury by ICP-MS, with special review of inorganic arsenic for brown-seaweed inputs.
• Marine sourcing-region disclosure, with a preference for clean, controlled waters, and finishing in GMP-registered facilities.

One foundation across the line

The same verified marine base runs through the Tide Line, our women's wellness line, so the mineral foundation stays consistent from product to product. It is the shared base in both Day Tide™ and Night Tide™, and we will be writing more about those two soon.

We named the company Everwild because we believe the wisest care is rarely the most processed. The Matrix is our attempt to honor that: whole plants, a measured approach to iodine, and numbers you can read on the label.*

Formulas containing Wild Purple Sea Moss and bladderwrack provide naturally occurring iodine and are not recommended for those diagnosed with hyperthyroidism.

Sources

1. Teas J, et al. Variability of iodine content in common commercially available edible seaweeds. Thyroid. 2004;14(10):836-841. https://pubmed.ncbi.nlm.nih.gov/15588380/
2. NIH Office of Dietary Supplements. Iodine: Fact Sheet for Health Professionals. https://ods.od.nih.gov/factsheets/Iodine-HealthProfessional/
3. Farebrother J, Zimmermann MB, Andersson M. Excess iodine intake: sources, assessment, and effects on thyroid function. Ann N Y Acad Sci. 2019;1446(1):44-65. https://pubmed.ncbi.nlm.nih.gov/30891786/
4. MacArtain P, et al. Nutritional value of edible seaweeds. Nutr Rev. 2007;65(12 Pt 1):535-543. https://pubmed.ncbi.nlm.nih.gov/18236692/
5. Felice VD, et al. Bioaccessibility and bioavailability of a marine-derived multimineral, Aquamin-Magnesium. Nutrients. 2018;10(7):912. https://pubmed.ncbi.nlm.nih.gov/30018220/
6. Darias-Rosales J, et al. Risk assessment of iodine intake from the consumption of red seaweeds (Palmaria palmata and Chondrus crispus). Environ Sci Pollut Res Int. 2020;27(36):45737-45741. https://pubmed.ncbi.nlm.nih.gov/32803579/
7. Wells ML, et al. Algae as nutritional and functional food sources: revisiting our understanding. J Appl Phycol. 2017;29(2):949-982. https://pubmed.ncbi.nlm.nih.gov/28458464/
8. Yu J, et al. Fucoidan extracted from sporophyll of Undaria pinnatifida grown in Weihai, China: chemical composition and comparison of antioxidant activity of different molecular weight fractions. Front Nutr. 2021;8:636930. https://pubmed.ncbi.nlm.nih.gov/34124117/
9. Lozano Muñoz I, et al. Minerals in edible seaweed: health benefits and food safety issues. Crit Rev Food Sci Nutr. 2022;62(6):1592-1607. https://pubmed.ncbi.nlm.nih.gov/33203217/
10. O'Gorman DM, et al. The marine-derived, multi-mineral formula, Aquamin, enhances mineralisation of osteoblast cells in vitro. Phytother Res. 2012;26(3):375-380. https://pubmed.ncbi.nlm.nih.gov/21751268/
11. Leung AM, et al. Potential risks of excess iodine ingestion and exposure: statement by the American Thyroid Association Public Health Committee. Thyroid. 2015;25(2):145-146. https://pubmed.ncbi.nlm.nih.gov/25275241/
12. Food and Agriculture Organization of the United Nations. Production, trade and utilization of seaweeds and seaweed products. https://www.fao.org/
13. Food Standards Australia New Zealand. Survey of inorganic arsenic in seaweed and seaweed-containing products available in Australia. https://www.foodstandards.gov.au/science-data/surveillance/surveyofinorganicarsenic

*These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure, or prevent any disease.