alt Hacker NewsStudies also show you do NOT need DHA and DHA can be detrimental, you want pure EPA or very high EPA to DHA ratio
if you want the purest Omega3 EPA without all the contaminants that are in OTC supplement nonsense (they are completely unregulated and untested by batch)
ask your doctor for a script of generic VASCEPA
CostPlusDrugs has the cheapest generic Vascepa that I've found
The dose is usually two pills a day but trust me on this, start with one for a long time, it takes your GI a long time to handle it without bathroom urgency
Your link doesn't say anything about dementia. Do you have any source that shows EPA is more beneficial than DHA?
What I found from a quick search says the opposite:
https://pmc.ncbi.nlm.nih.gov/articles/PMC4019002/