The FDA has defined amount of heavy metals for spirulina, but concentration of heavy metals in the market are more than FDA definition and some countries dont have standard or upper levels for these.
Read the Recommended daily intake of heavy metal elements (Iyengar, 1985). In Naif Abdullah Al-Dhabi, 2013Vol. (4) pg 383-388
Elements Ni Zn Hg Pt Mg Mn
Daily intake (mg/daily) 0.4 13 0.01 0.002 400 4
Hope this will help you.
There are now thought to be no safe limits for these heavy metals: there are probably adverse effects at all levels.
In European Community, maximum limits were set for cadmium (3 mg/Kg) in food supplements consisting exclusively or mainly of dried seaweed and products derived from seaweed (Reg. UE 488/2014) and for mercury (Reg. UE 1881/2006, 420/2011) in food supplements (0.1 mg/Kg).
In my knowledge, there are no limits for arsenic in food (but there are maximum limits in feed!) but in this link you will find the last scientific opinion of the European Food Safety Authority, “Dietary exposure to inorganic arsenic in the European population”
best regards
stefania
http://www.efsa.europa.eu/en/efsajournal/doc/3597.pdf
Dear all
I have a sample of spirulins powder that its heavy metals concentration is :
AS < 0.4 ppm
Cd < 0.3
Pb < 0.3
can I add 6 gr of this spirulina in food daily?
Are these values the limits of quantitation of the analytical method (which one?). If yes,
your spirulina sample seems not to have a detectable content of heavy metals and i think there is not a problem to use it as food supplement, even if I would have checked the mercury content
best regards
stefania
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