Marine Phytoplankton.

Marine phytoplankton synthesise EPA and, in some taxa, DHA; fish acquire these fatty acids by eating them. Supplementing both supplies the same fatty acids from two points in one food chain. The phytoplankton contribution per gram is small compared with a concentrated oil, so the two are complementary rather than interchangeable.

DHA in the marine food web originates in microalgae, particularly dinoflagellates and some diatoms. A phytoplankton preparation contributes that fatty acid in its native phospholipid and glycolipid context. Concentrated DHA oils deliver far more per serving, so pairing is about matrix variety rather than dose.

Eicosapentaenoic acid is produced by several diatom and haptophyte groups that make up commercial phytoplankton biomass. Taken with a concentrated EPA source, the two feed the same fatty acid pool. The phytoplankton form arrives bound in polar lipids rather than as a triglyceride or ethyl ester.

Astaxanthin is a ketocarotenoid that sits in lipid membranes and quenches peroxyl radicals. Phytoplankton biomass is rich in long-chain polyunsaturated fatty acids, which are the lipids most prone to peroxidation. Formulating them together is a standard way to protect a marine lipid matrix.

Vitamin E terminates lipid peroxidation chains in membranes and in oils. Phytoplankton lipids are highly unsaturated and oxidise readily in storage. Tocopherol is routinely included with marine lipid material for that reason.

Once vitamin E quenches a lipid radical it becomes a tocopheroxyl radical, and ascorbate reduces it back to the active form. In a formulation carrying marine lipids that recycling extends the useful life of the tocopherol. The relationship is settled redox chemistry.

Carotenoids from algal biomass reach the enterocyte inside mixed micelles, which need dietary fat to form. Medium-chain triglycerides supply that fat and act as a dispersion vehicle in liquid formats. Without fat in the same sitting, pigment uptake from a dry powder is limited.

Lecithin phospholipids emulsify algal lipids and pigments into a finer dispersion in water. That improves both the stability of a liquid product and the surface area available for micelle formation. It is a formulation aid with an absorption rationale behind it.

Phytoplankton biomass carries a mixed carotenoid profile including beta-carotene, fucoxanthin and diadinoxanthin depending on species. Adding beta-carotene supplies more of a pigment class already present. The mixed algal profile is not equivalent to any single purified carotenoid.

Every chlorophyll molecule holds a single magnesium ion at the centre of its ring. Chlorophyll-rich algal biomass therefore contributes a small amount of bound magnesium alongside its pigment. The quantity is minor next to a magnesium supplement and does not replace one.

Marine biomass grown in saline media takes up iodide, and content varies with species and growing conditions. Stacking a phytoplankton product with a separate iodine supplement adds an unmeasured amount to a measured one. Anyone using both should check the supplier's iodine figure rather than assume it is negligible.

Glutathione peroxidase is a selenoenzyme, and it is the main route by which the body clears lipid hydroperoxides formed from polyunsaturated fatty acids. A diet richer in long-chain polyunsaturates raises the demand on that system. The cofactor relationship is textbook, not a tested combination.

Certain algae and cyanobacteria accumulate corrinoids that bind B12 assays without functioning as a cofactor in human cells. A B12 figure on an algal label may therefore overstate what the body can use. A dedicated cyanocobalamin or methylcobalamin source is what an assured intake relies on.

Chlorella and marine phytoplankton are both whole dried microalgae sold for their protein, pigment and mineral content. They are blended so that one product covers a wider pigment and fatty-acid spread than either species alone. No trial has compared the blend against its parts.

Spirulina is a cyanobacterium carrying phycocyanin and gamma-linolenic acid, while marine phytoplankton contribute long-chain omega-3 fatty acids and different carotenoids. The two are combined in algae blends because their profiles barely overlap. That is a compositional argument, not a measured interaction.

Photosynthetic microalgae are iron-dense because their electron-transport proteins require it, so dried biomass contributes non-heme iron. Non-heme iron absorption is strongly influenced by what is eaten alongside it. Ascorbate in the same meal raises uptake and polyphenols lower it.

Catechins with a galloyl group bind ferric iron and form poorly absorbed complexes. Algal biomass supplies non-heme iron, which is exactly the form affected. Separating a strong tea polyphenol dose from an iron-carrying algae serving avoids the interaction.