Table 3 Average amounts of minerals, protein, fat, total polyphenols and phytic acid ingested by the four test mealsa

From: Zinc absorption from maize-based meals enriched with edible house crickets: a randomized crossover stable-isotope study in Kenyan pre-school children

 

With crickets

Without crickets

 

Whole

Low-chitin

High-zinc

Low-zinc

 

WC

EC

HZ

LZ

Amount of flour (g) consumed per meal

 Maize flour

5.59 ± 0.94

5.31 ± 1.31

6.93 ± 0.01

6.93 ± 0.01

 Insect flour

16.14 ± 2.70a

15.54 ± 3.63a

-

-

Amount of zinc (mg) consumed per meal

 Insect flour:

2.49 ± 0.42

1.89 ± 0.44

-

-

of which intrinsically labeled (67Zn)1

0.41 ± 0.07

0.33 ± 0.08

-

-

 Maize flour:

0.12 ± 0.02

0.11 ± 0.03

0.15 ± 0.00

0.15 ± 0.00

 Extrinsically added isotope-labeled (68Zn)2

-

-

0.75 ± 0.00

0.75 ± 0.00

 Extrinsically added natural isotope composition

-

0.51 ± 0.12

2.34 ± 0.00

-

Total zinc

2.61 ± 0.44b

2.51 ± 0.59b

3.24 ± 0.00a

0.9 ± 0.00c

 PA:Zinc3

1.9

1.9

1.9

6.9

Amount of other micronutrients (mg) consumed per meal

 Calcium

9.73 ± 0.04a

23.36 ± 5.45c

0.29 ± 0.00b

0.29 ± 0.00b

 Iron

1.00 ± 0.17a

0.95 ± 0.22a

0.12 ± 0.00b

0.12 ± 0.00b

 Copper

0.36 ± 0.06a

0.34 ± 0.08b

0.01 ± 0.00c

0.01 ± 0.00c

Amount of anti-nutrients consumed per meal

 Phytic acid, mg

50.18 ± 8.41b

47.59 ± 11.71b

62.19 ± 0.06a

62.18 ± 0.07a

 Polyphenols, mg4

45.85 ± 7.67b

68.36 ± 15.95a

-

-

 Chitin, g

0.62 ± 0.10

nd

-

-

Amount of macronutrients (g) consumed from cricket flour

 Protein

7.12 ± 1.19a

5.57 ± 1.30b

-

-

 Soluble protein

0.32 ± 0.05b

1.36 ± 0.32a

-

-

 Fat

3.02 ± 0.51b

3.70 ± 0.86a

-

-

Amount of calories (kcal) per meal consumed

97.6 ± 12.2

94.9 ± 16.3

25.0 ± 0.0

25.0 ± 0.0

Amount of porridge (g) per meal consumed

113.12 ± 18.96

107.28 ± 26.39

120.18 ± 0.13

120.16 ± 0.13

  1. aValues are presented as means (mg/ meal) ± SDs for calcium, iron, zinc, copper, phytic acid and polyphenols, or as means (g/ meal) ± SDs for chitin, protein, soluble protein and fat calculated based on the average consumed amounts. The basis for all meals was refined maize flour. Comparison of test-meal composition values was assessed by two-sided pairwise t-tests or One-way Anova. Means in a row without a common letter differed, with P < 0.05 considered to be significant. 1Whole cricket (WC) and low-chitin cricket (EC) flour containing meals were intrinsically labeled (67Zn), hence intrinsically labeled zinc forms part of total zinc in insect flour. 2Meals without crickets (LZ and HZ) were extrinsically labeled (68Zn). 3Phytic acid: zinc molar ratio (mol/mol). 4Expressed in GAEs, gallic acid equivalents. nd not detectable.