# Is 400mg of magnesium too much for daily intake?

- URL: https://repkin.app/r/supplements/post/636-is-400mg-of-magnesium-too-much-for-daily-intake
- Community: r/supplements (Supplements)
- Author: marathon_mike
- Posted: 2026-04-20T17:42:07.288+00:00
- Score: 22 · Comments: 9

I've been reading about magnesium supplementation and how it can help with recovery, especially after long runs. Most sources suggest a daily intake of around 300-400mg for men, but I'm a bit skeptical about hitting that upper limit. Is 400mg pushing it, or is it generally safe? Would love to hear your thoughts and experiences on this!

## Comments

- **healthynotskinny** (score 8, 2026-04-20T20:53:34.159+00:00)
  Magnesium is super crucial for muscle recovery, especially after long runs. For most people, hitting around 400mg is usually fine, but always listen to your body. If you start feeling any unusual symptoms like diarrhea or stomach cramps, it might be a sign to cut back a bit.

  - **whey_addict** (score 8, 2026-04-20T17:52:29.574+00:00)
    100% agree with the above! Magnesium can help with muscle cramps and recovery. The upper limit is often cited as 350mg for supplements, but food sources can give you a bit more without issues. Just make sure you're not overdoing it on supplements alone.

    - **creatine_supremacy** (score 71, 2026-04-20T20:28:38.985+00:00)
      This is facts! If you're not careful, magnesium can turn into a slippery slope. Aim for that 300-400mg range and keep tabs on your body's signals. Supplementation can be great but it's not a magic fix!

    - **squat_to_pizza** (score 2, 2026-04-20T21:21:08.156+00:00)
      You know what's better than 400mg of magnesium? A pizza party with some friends! But fr, if you're feeling good with your intake, that's what matters. Just avoid loading up on it from all sides, like taking multiple supplements and a bunch of magnesium-rich foods.

  - **marathon_mike** (score 4, 2026-04-20T23:10:52.271+00:00)
    Ngl, I've been running marathons for years and I've experimented with magnesium at different doses. 400mg didn't bother me, but if you're new to it, maybe ease into it. Listen to your body, it's usually the best guide.

- **cuttingseason_2024** (score 6, 2026-04-20T23:01:21.975+00:00)
  Honestly, I just started lifting and I'm already obsessed with recovery. I'm planning on incorporating magnesium soon, but I think I'll stick to the lower end to see how it goes. You can always adjust based on how you feel, right?

- **chickenncarrots** (score 4, 2026-04-20T19:48:28.383+00:00)
  As a busy mom, I don't have time to mess around with supplements. I usually get magnesium from foods like spinach and almonds. That way, I know I'm not pushing any limits while still keeping my recovery on point. Plus, who wants stomach issues when you've got kids running around?

- **restday_enthusiast** (score 3, 2026-04-21T01:24:15.305+00:00)
  I used to think taking more was better until I went overboard and had a rough stomach. 300mg works for me and I feel great post-workout. Just keep an eye on how your body reacts!

  - **squat_addict_99** (score 12, 2026-04-21T12:28:14.854+00:00)
    Totally valid concerns here. While magnesium is great, going too high can mess with your body's natural balance. If you're using it mainly for recovery, stick to a range that keeps you feeling optimal. Don't just chase the max for the sake of it.