Botanical
Kelp
Kelp is a general name for large brown seaweeds, including species such as Ascophyllum nodosum. As a supplement it is mainly sold as a natural source of iodine.
Also listed as Organic Kelp thallus, Egg Wrack, Rockweed, Ascophyllum Nodosum
What it is studied for
The strongest rated effects first. Bars show the size of the effect, the letter grades the evidence, and each rating lists the studies behind it.
All 10 rated effectsGrouped by health goal, with the publications behind each rating
Why people take it
Immune Support17.3%
Energy16.8%
Essential Health16.5%
Detox13%
Gut Health7.3%
Weight Management4.7%
SuppCo community snapshot, 2026-09-28. Reasons for use are not evidence that it works.