La sua DGA per l'uomo, secondo il JECFA (1987) è fino a 75 mg/kg di peso corporeo. Nel 2011 comunque l'opinione è stata revisionata e l'opinione attualmente è questa:
"carrageenan may be used safely in the diet, and is only limited by the amount necessary to
achieve its technical function. They performed a multiple-year review of all of the relevant safety
data on carrageenan, including a specific analysis of colon cancer promotion.
Based on studies, which included a three-generation study of reproductive toxicity, short- and long-term studies of
toxicity in rats at dietary concentrations up to 5%, and short- and long-term studies in hamsters,
guinea pigs, and monkeys, they concluded that carrageenan may be used safely in the diet and
recommended an Acceptable Daily Intake of “not specified,” which is the highest possible
classification from a toxicological point of view. This term is used to refer to a food substance of
very low toxicity, which on the basis of the available data (chemical, biochemical, toxicological,
and other), the total dietary intake of the substance arising from its use at the levels necessary to
achieve the desired effects, and from its acceptable background levels in food, does not in the
opinion of the Committee represent a hazard to health"
Quindi in realtà non c'è una dose massima precisa, si considera sicura la dose per cui la carragenina riesce a svolgere la sua funzione.