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Table 2 Proximal, mineral and elemental composition of different Ca sources.

From: Calcium from salmon and cod bone is well absorbed in young healthy men: a double-blinded randomised crossover design

Component Salmon bone (protease)1 Salmon bone (boiling)1 Salmon bone (protease) Cod bone (boiling) Calcium supplement from Pharmacy or health store
      A B C D 1
Ash (g/100 g) 55.5 43 67.8 65.7 0 2.8 90.9 78.9
Protein (g/100 g) 36 35.7 26.6 32.4 0.46 0.50 0.74 0.56
Fat (g/100 g) 3.0 17.8 <0.2 7.9 0 0 0 0
Minerals (g/kg dry weight)        
Ca 208 157 261 248 0.04 24 336 324
K 1.3 3.2 0.03 2.3 0.069 0.083 1.3 0.095
Mg 4.1 2.6 3.2 3.5 0.004 0.085 29 1.8
Na 1.9 3.1 2.1 6.0 0.024 0.28 5.9 0.27
P 156 89 151 180 <0.04 <0.04 0.95 0.77
Essential trace elements (mg/kg dry weight)      
Cu 17.1 4.5 0.5 3.9 <0.3 <0.3 1.0 0.6
Fe 24 20 69 19 < 0.5 7.0 3500 150
I 0.28 <0.02 0.14 3.7 n.d. 0.11 16.2 0.06
Mn 66 36 3.2 28 <0.02 4.2 141.8 15.5
Se 0.3 0.4 0.5 0.4 <0.1 <0.1 0.2 <0.1
Zn 174 106 57 58 <0.1 0.5 8.4 1.9
Non-essential elements (mg/kg dry weight)      
As 0.34 1.5 0.11 0.61 <0.01 0.01 2.53 1.07
Cd <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 0.12 0.08
Hg 0.01 0.02 <0.03 <0.01 <0.01 <0.01 <0.01 <0.01
Pb 0.11 0.05 <0.04 0.06 <0.02 0.03 3.03 0.09
  1. Fish bones were rinsed for soft tissue by boiling or use of industrialised produced enzymes (proteases).
  2. 1Malde et al. [11].