To answer the questions rasied by MCWillow yesterday I'll give a narrative example of how to calculate Krill oil doseage. I'll base it on pork cheek but there should be enough detail here that you can extrapolate to to any meat. Not clear? just let me know.
Some assumptions first:
Lets assume that we are targeting an Omega 6 [n-6] to Omega 3 [n-3] ratio in the weekly feed of 2:1. You can read tonnes of papers and articles on the ideal ratio (indeed I have) but Esther Plantinga et al tell us that the natural diet is 2:1 and that's good enough for me. You wont easily get there with a pure pork diet, as you'll see, but let's if we can get inside the 'safe' upper limit of 4:1 and take it from there.
Lets assume that when the n-3 comes from krill oil that you need to dose at 2/3 of the doseage from normal fish oil because the n-3 is derived from phospholipds. Opinion varies. That you need less n-3 if it comes from Krill is a fact. The dr. Becker video posted last night said you need only a 5th but unbiased scientific opinions tend to say 2/3 so we'll use that.
Finally, I'll assume Holland and Barrett 1500mg Krill capsules. Each one of these contains 0.255g of n-3. You can just change the math a bit if you use a different source.
So... We'll start with a Kg of raw lean pig cheek having 5% fat. Foodcomp.dk tells us that contains 5.1g n-6 and 0.46g n-3, a ratio of 11:1 :thumbdown: You would like to have 2.55g of n-3 in there (5.1/2) and so need to add 2.09g (2.55-0.46) but if it comes from krill you need to add only 1.39g (2.09*2/3). That means you would have to add 5.5 capsules per kilo (1.39/0.255).
Sadly, that dog wont hunt. 5 and 1/2 capsules per kg will taste too strong for the cat and be too expensive for the slave. So lets see what we can practically do. I know, from experience, that cats can be trained to like the krill added at the rate of 2 capsules per kilo so lets see where that plane lands....
We start with a Kg of lean pig cheek again having 5.1g n-6 and 0.46g n-3. Then we add two capsules containing 0.51g n-3 which has an effective value because it is from krill of 0.77g (0.51*3/2). Now the food has 5.1g n-6 and 1.23g n-3 which is a cats whisker over 4:1. That in itself is a HUGE improvement to the diet.
Now lets see how to take it further. If you can wean them over gradually to a mixture of pork and another protein you get big wins (unless the other protein is intensively farmed chicken). If you go to foodcomp.dk again you will see that a 50/50 mix of pig cheek and lamb leg gives 3.19g n-6 and 0.87g n-3, a ratio of 3.67:1. Add two capsules to that and the resulting feed as a ratio of 1.95:1
(It goes without saying that if you fed lamb alone you wouldn't add any krill oil but you can do the maths yourself now).
Here's another approach. Lets imagine your cat eats a Kg of the supplemented pork meal per week. We saw that has 5.1g n-6 and 1.23g n-3, a ratio of about 4:1. Now then, lets deprive him of a 50g meal so the numbers are now 4.85g n-6 and 1.16g n-3 (Multiply both the start numbers by 0.95). Now replace that 50g meal with 50g of raw salmon. That adds 0.21g n-6 and 1.64g n-3 (foodcomp again). New grand total for the week = 5.06g n-6 and 2.8g n-3 a nice ratio of 1.8:1. Course you gotta get kitty to eat the salmon but any oily fish will do.
Bottom line for the pork feeders is this. If you can add a couple of these krill capsules per kilo of meat (get there VERY gradually) and swap a 50g meal each week for a portion of oily fish you are about on target. You can work out all the other combinations by following the logic above. I hope I haven't confused the issue still further.
Some assumptions first:
Lets assume that we are targeting an Omega 6 [n-6] to Omega 3 [n-3] ratio in the weekly feed of 2:1. You can read tonnes of papers and articles on the ideal ratio (indeed I have) but Esther Plantinga et al tell us that the natural diet is 2:1 and that's good enough for me. You wont easily get there with a pure pork diet, as you'll see, but let's if we can get inside the 'safe' upper limit of 4:1 and take it from there.
Lets assume that when the n-3 comes from krill oil that you need to dose at 2/3 of the doseage from normal fish oil because the n-3 is derived from phospholipds. Opinion varies. That you need less n-3 if it comes from Krill is a fact. The dr. Becker video posted last night said you need only a 5th but unbiased scientific opinions tend to say 2/3 so we'll use that.
Finally, I'll assume Holland and Barrett 1500mg Krill capsules. Each one of these contains 0.255g of n-3. You can just change the math a bit if you use a different source.
So... We'll start with a Kg of raw lean pig cheek having 5% fat. Foodcomp.dk tells us that contains 5.1g n-6 and 0.46g n-3, a ratio of 11:1 :thumbdown: You would like to have 2.55g of n-3 in there (5.1/2) and so need to add 2.09g (2.55-0.46) but if it comes from krill you need to add only 1.39g (2.09*2/3). That means you would have to add 5.5 capsules per kilo (1.39/0.255).
Sadly, that dog wont hunt. 5 and 1/2 capsules per kg will taste too strong for the cat and be too expensive for the slave. So lets see what we can practically do. I know, from experience, that cats can be trained to like the krill added at the rate of 2 capsules per kilo so lets see where that plane lands....
We start with a Kg of lean pig cheek again having 5.1g n-6 and 0.46g n-3. Then we add two capsules containing 0.51g n-3 which has an effective value because it is from krill of 0.77g (0.51*3/2). Now the food has 5.1g n-6 and 1.23g n-3 which is a cats whisker over 4:1. That in itself is a HUGE improvement to the diet.
Now lets see how to take it further. If you can wean them over gradually to a mixture of pork and another protein you get big wins (unless the other protein is intensively farmed chicken). If you go to foodcomp.dk again you will see that a 50/50 mix of pig cheek and lamb leg gives 3.19g n-6 and 0.87g n-3, a ratio of 3.67:1. Add two capsules to that and the resulting feed as a ratio of 1.95:1
(It goes without saying that if you fed lamb alone you wouldn't add any krill oil but you can do the maths yourself now).Here's another approach. Lets imagine your cat eats a Kg of the supplemented pork meal per week. We saw that has 5.1g n-6 and 1.23g n-3, a ratio of about 4:1. Now then, lets deprive him of a 50g meal so the numbers are now 4.85g n-6 and 1.16g n-3 (Multiply both the start numbers by 0.95). Now replace that 50g meal with 50g of raw salmon. That adds 0.21g n-6 and 1.64g n-3 (foodcomp again). New grand total for the week = 5.06g n-6 and 2.8g n-3 a nice ratio of 1.8:1. Course you gotta get kitty to eat the salmon but any oily fish will do.
Bottom line for the pork feeders is this. If you can add a couple of these krill capsules per kilo of meat (get there VERY gradually) and swap a 50g meal each week for a portion of oily fish you are about on target. You can work out all the other combinations by following the logic above. I hope I haven't confused the issue still further.
