Table 7.

Provisional maximum tolerable intakes (PMTIs) calculated using a daily intake for an adolescent > 19 years of age and an average Kenyan body weight of 56.26 kg mg/kg bw/d, using a contribution of 100 g (ww) serving of cage and wild Nile tilapia (O. niloticus) calculated as an average from each of the four zones: North, South, Strait and Lake. PMTI values from NAS, 2011, JECFA, 2020 and WHO, 1996

PMTI	Al	As#	Cr*	Hg	Ni	Pb#	Sn	Cd
	mg/kg bw/d	mg/kg bw/d	mg/kg bw/d	mg/kg bw/d	mg/kg bw/d	mg/kg bw/d	mg/kg bw/d	mg/kg bw/d
	0.32	0.003	0.0351	0.0042	0.603	0.0032	2.02	0.00082
PTWI	2 mg/kg bw/w2	0.0001–0.0032	0.025 mg/kg bw/w2	0.0016 mg/kg bw/w2		0.00002 − 0.0032	14 mg/kg bw/w2	PTMI 0.025 mg/kg bw/m2
North
Cage	0.005	0.0001	0.2	0.002	0.0001	0.003	0.0001	0.001
Wild	0.007	0.0001	0.3	0.003	0.0002	0.003	0.00002	0.1
South
Cage	0.01	0.0001	0.3	0.002	0.0002	0.002	0.00001	0.001
Wild	0.01	0.0001	0.1	0.003	0.0001	0.003	0.00001	0.1
Strait
Cage	0.01	0.00004	0.3	0.003	0.0001	0.003	0.00004	0.001
Wild	0.01	0.0001	0.1	0.002	0.0001	0.002	0.00001	0.001
Lake
Cage	0.004	0.0002	0.03	0.001	0.00004	0.001	0.00002	0.001

*Adequate intake as recommended by National Academy of Sciences (USA), 2011

^#Best Estimate as recommended by Joint FAO/WHO Expert Committee (JECFA), 2020

¹National Academy of Sciences (USA), 2011

²Provisional maximum tolerable intakes (PMTIs) Joint FAO/WHO Expert Committee on Food Additives (JECFA), 2020

³World Health Organisation (WHO) 1996. Trace elements in human nutrition (Technical Report Series, No. 532)