As far as I am aware, radical life extension is not considered one of the focuses of Effective Altruism. 80,000 Hours Problem Profiles page doesn't mention it; the Wikipedia and AIs say it isn't. The most recent mention of life extension on this forum I found is this request for questions as a preparation for the interview to evaluate the cause Life Extension Advocacy Foundation (LEAF). No questions were asked and I couldn't find the interview; it seems that there just wasn't any interest in the topic.
But why?
About 166,000 people die in the world each day, or 60 million per year, most of them from age-related disease. If we could postpone that for 1 year, we would save tens of millions of QALYs, or raise world GDP by 1-2%, in economic terms. This should make causes focused on extending lives worthy of consideration, in my view; wouldn't it?
Then why can I see no sign that radical life extension was even considered as a field of Effective Altruism? The AI told me that radical life extension is speculative, but so is preventing risks from AI, isn't it?
Is it because the interests of the originators of EA movement lie elsewhere (and the movement followed)?
CEARCH did a shallow dive into this (https://docs.google.com/spreadsheets/d/116DqgnzADo8zAmJ_QAp9AKcjKPMlgBs2Hc9E7SSAASM/edit#gid=0) and our preliminary conclusion is that the marginal expected value of funding life extension research doesn't meet our threshold of 10x GiveWell. A lot of uncertainty, obviously, but generally things look good upfront and worse later, so this wasn't a promising sign, and we decided not to spend more time on this.