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We know that Captain America was born in 1918. However, his serum slows down his aging process. My question is, how old exactly is Captain America at the end of Avengers: Endgame,

after he comes back as an old man?

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    “his serum slows down his aging process” — does it, in the movies?
    – Paul D. Waite
    May 10, 2019 at 20:31
  • 3
    Very related question.
    – TheLethalCarrot ♦
    May 10, 2019 at 20:33
  • @PaulD.Waite Since him being defrosted 12 years ago, he looks almost identical now.
    – Ibraheem Ahmed
    May 10, 2019 at 20:40
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    @Redline: Paul Rudd was in the last season of Friends 15 years ago, and he looks almost identical now too. The only serum stopping Cap from visibly ageing is diligently-applied moisturiser!
    – Paul D. Waite
    May 10, 2019 at 20:49
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    @Redline: oh, well if it's a common belief, then it must be true. If it's not in the movie, it's not in the movie. His appearance as a 114 year old man is the best case for some serum-assisted reduced aging, but I'm not sure how reliably distinguishable late-80s is from mid-hundred-teens. Here's a 112 year old man.
    – Paul D. Waite
    May 10, 2019 at 21:59

2 Answers 2

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Chronological time

Captain America was born July 4, 1918. The events of Endgame take place in 2023. He then time-jumped from 2023 back to 1948 and lived his life until ending up back in 2023.

In cumulative time, this makes him approximately 180 years old at the end of Endgame.

Unfrozen time.

Captain America was frozen in the year 1945 aged 27. He was defrosted in the year 2011 and lived until 2023, then looped back around to 1948. He then lived (unfrozen) until 2023.

His cumulative unfrozen time is approximately 114 years.

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    @Redline: who are we, Doctor Strange? We don't know!
    – Paul D. Waite
    May 10, 2019 at 20:32
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    If you want a better write up of this, in my completely unbiased opinion, see this answer.
    – TheLethalCarrot ♦
    May 10, 2019 at 20:34
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    @KeithMorrison but since MCU now has time travel and alternative timelines, there's no telling what Agent Carter that was.
    – Paul Draper
    May 10, 2019 at 21:56
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    @PaulDraper: which, coincidentally, was Steve's excuse when that kiss with Peggy's grand-niece came up.
    – Paul D. Waite
    May 10, 2019 at 22:00
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    I can't agree with this because we don't know whether the mechanism for getting back from the alternate timeline back to the primary one involved additional time travel. And there's a pretty good reason to suspect it did. At the very least, we could posit he may have stayed in that timeline until his wife died and then traveled back.
    – ThePopMachine
    May 11, 2019 at 2:22
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I have a theory. We know that Peggy Carter dies in 2016, as seen in the MCU. At that point, I think that Captain America decides to return to the original timeline some time before he leaves, so that he can be on the bench. This gets rid of the discontinuity between timelines, and stuff like that. It also makes him 7 years younger than most estimates, as well as having him skip the Snapture. This means that unlike most answers say, he is actually 107. Added on to this the serum, and he is probably in his biological mid 80's. While the theory is my own, it also makes sense, as he knew that Peggy would die in 2016, and probably wanted to avoid the Snapture.

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  • Welcome to SciFi.SE! I'm afraid I don't understand what you're trying to say here. Are you saying he lived normally until Peggy's death in 2016, then jumped forwards in time to 2023? Is there any evidence to support that?
    – F1Krazy
    May 11, 2019 at 15:10
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    Yes, I am saying this. While it's speculation, it does make sense. The main reason he went back was to live with Peggy, once she died he had to get back to the main timeline. In the movie it says that what you do in the past doesn't affect the present, meaning that if he tried to go to the past and then use the normal passage of time to bring himself forward it wouldn't work. Once Peggy was gone there was no reason for him to stay. The evidence is that he was on the bench, meaning he had to travel back with Pym particles. Time travel in end game doesn't work like Back to the future, he had to
    – user116446
    May 11, 2019 at 15:17
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    go from the other timeline to the normal one.
    – user116446
    May 11, 2019 at 15:18
  • When you put it like that, it makes more sense.
    – F1Krazy
    May 11, 2019 at 15:35

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