PLNKTN: algae oils and nutrients, what to check

"Algae" on a label can mean several different things: an omega-3 oil from microalgae, a whole-algae powder like spirulina, or an ordinary nutrient sitting beside an algae-derived ingredient. PLNKTN lists all of these side by side, which makes it a useful way to learn the differences.

What PLNKTN's homepage lists

On 8 October 2026 the PLNKTN homepage listed plankton capsules, algae-based omega-3 (including a liquid and an "Omega-3 Plus"), magnesium, vitamin D3 with K2, astaxanthin, vitamin B12, spirulina and chlorella, and bundles (supplier information, read on that date). We describe what the shop's public pages say; we haven't tested its products. The range falls into three kinds of product: oils, nutrients, and whole or powdered algae.

Algae oils: the EPA and DHA per serving

Plant-based readers often ask whether algae oil is a real alternative to fish oil. The label can answer part of that. "Omega-3" on the front isn't a measurement; look for the EPA and DHA amounts per serving. Then check the form, capsule or liquid, because a liquid's serving is a measured volume and a capsule's is a number of pieces. A label that quotes the amount of oil instead of the EPA and DHA content can look generous and still tell you little.

Which algae, and which part of it?

Species and material belong on the label. Ask what is actually in the product: an oil, whole algae, or an extract. Spirulina and chlorella are listed here as algae products, while astaxanthin and the plankton capsules are separate ingredients again. They are different materials and shouldn't be compared as if they were one thing. Marketing stories attach to several of them, so where the research on an ingredient is limited, this page doesn't fill the gap.

Nutrient products: form and amount, not the name

Magnesium and vitamin D3 with K2 are everyday nutrients, and for both the form and the amount per serving matter more than the brand. For magnesium specifically, our magnesium types guide explains why the compound and the elemental amount are different numbers.

"Natural" and "plant-based" describe origin

Words such as "natural" or "plant-based" tell you where something came from, not how much of it you get or what it does. The same goes for antioxidant stories: laboratory mechanisms don't tell you what happens in people, so this page draws no longevity conclusions from them.

Where to read next

The guide to reading supplement labels is the best general starting point.

Written by Smart Supplements with AI assistance from the sources linked in the text. It has not been reviewed by a clinician.

Last updated: 12 October 2026