I personally don't take it. Flax seed oil becomes rancid very rapidly, both inside and outside the body. It is not good for everyone, especially Pitta and Kapha types (see my book Timeless Secrets of Health and Rejuveantion, ener-chi.com) for details on body types. I also don't give as much credence to the theories about the distinction and importance of Omega 3 versus Omega 6. These ignore the processes in the body responsible for making everything the body needs available as long as the basic digestive processes are intact. It is better to eat a few nuts and seeds like almonds and pumpkin seeds per day than taking such concentrated oils that are pretty unstable when they are removed from these foods. Seed oils are very concentrated and when eating them, you hardly ever can overdose on these oils. You need a very large amount of flax seeds to make one tablespoon of oil from it. It isn't an easy process and relatively new. The world lived without and nut oils for ages. Some very healthy people in remote areas have surviced very well and live easily up to 100 years without any Omega 3 oils. Now suddenly, we are told that so many diseases are due to the missing fats in our diet. Oils have been expeller pressed traditionally for hundreds and thousands of years from coconuts, olives, and other fruits and are hardly susceptible to becoming rancid. People have become 100 years old or more without ingesting Omega 3 oils.
I have used olive oil, butter, ghee, and cocnut oil throughout my adulthood for over 30 years and found no adverse effects, and developed no signs of Omega 3 deficiency. Being a Pitta type, though, my body had adverse reactions to flax seed oil. If in doubt, do the Kinesiology muscle testing and don't my words or anyone else's opinion as the final truth in this matter.
Yes, oxy-powder can be taken by children.