Product

Number of samples

Mean ± S.E

Range

Fig

30

1.9 ± 1.1^a

Almond

25

1.7 ± 1.2^a

Hazelnut

25

1.6 ± 1.4^a

Walnut

40

1.8 ± 1.5^a

Pistachio

40

1.5 ± 1.2^a

Sunflower

40

1.3 ± 1.2^a