Milk is included in these DHA-fortified products. But while some kinds of fish do contain high levels of contaminants, there are several species that are considered to be low in such impurities.ДЄs consumers look to these low-risk seafood products and other foods that are healthier choices, the market also continues to grow for healthier products fortified with DHA. In addition to that possible shortage, another concern about fish is that of contaminants, mercury in particular. While the situation is OK now, Putnam said in the future, maybe in a decade or two, it will become a huge issue thatвЂ™s thereвЂ™s not enough fish to continue making those supplements. вЂњItвЂ™s a really sad fact of life, but we have so many people on this planet we need to feed that we are now taking so many fish out of the ocean for human health supplements we donвЂ™t have much left for protein use.вЂќ

I say that because we are simply overfishing our seas,вЂќ she said. вЂњThere are some issues with fish, fish meal and fish oil, which are unsustainable sources of DHA. However, she said many people are concerned about fish in general and wonder if taking fish oil on a daily basis might come with some negative aspects. In addition to being naturally present in fish and some plants, Putnam said DHA can also be found in supplements like fish oil tablets, something many physicians and dieticians have recommended for a number of years. вЂњI think it has some really promising implications there.вЂќ вЂњA natural progression of aging is a shrinking brain, and one study in particular was showing that an older person with higher levels of DHA could actually preserve the size of their brain and their brain health for about one to two years compared to someone who had low levels of DHA,вЂќ she said.

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