The Best Magnesium for Seniors (65+)
For most people over 65, we pick Revive MD Magnesium Glycinate. It gives 200 mg of magnesium in 2 capsules, which stays under the 350 mg limit for pills, and it costs $0.33 a day. Kidney disease? Ask your doctor first.
By Erin Rose Updated November 3, 2026 How we score
Our pick for: adults over 65
- Per day
- $0.332 capsules: 200 mg of magnesium
- A bottle
- 60 servings, $19.99Revive MD’s own price
- Testing list
- Informed SportTests every batch for drugs banned in sport; not a label check
Why it fits after 65 Older adults tend to eat less magnesium, absorb less of it and lose more in urine (NIH). The target does not rise with age, so a pill only needs to fill the gap between your food and 420 mg (men) or 320 mg (women). 200 mg does that and stays under the 350 mg limit, with room for food. It is glycinate, a form many people choose because it is gentle on the stomach. Take it at least 2 hours apart from osteoporosis drugs (bisphosphonates such as alendronate); some antibiotics need more space (NIH).
What you give up On the Informed Sport list: every batch is tested for drugs banned in sport. It is not a check of the label. Nature’s Truth Magnesium Glycinate is the same dose with a label check, for a little more a day.
Which magnesium fits you?
Revive MD suits most people over 65. If one of these is you, start there.
Kidney disease, a heartburn pill or a water pill? Ask your doctor first.
If you have kidney disease, ask your doctor before you take magnesium. Weak kidneys cannot clear the extra, so it can build up (NIH). Heartburn pills (PPIs) taken for a year or more can lower magnesium, and supplements do not always raise it, so ask your doctor to check your level first. Water pills change how much you lose, and osteoporosis drugs and some antibiotics need hours of space from magnesium (NIH).
Want a label check?
Nature’s Truth Magnesium Glycinate gives the same 200 mg in 2 capsules and is on NSF/ANSI 173, which checks that the capsule holds what the label says.
Nature’s Truth Magnesium Glycinate
$0.35 a day at Nature’s Truth’s list price
Prefer citrate?
Nature Made Magnesium Citrate gives 250 mg in 2 softgels and is on USP Verified. Small studies found citrate absorbed better than oxide (NIH). It can loosen stools, so skip it if yours are already loose.
Nature Made Magnesium Citrate
$0.39 a day at Nature Made’s list price
Trouble swallowing capsules?
A powder lets you take a smaller amount at a time. NOW Magnesium Glycinate Powder gives 300 mg in a level teaspoon, under the 350 mg limit. It is not on a testing list.
NOW Magnesium Glycinate Powder
$0.32 a day for a teaspoon
How to choose magnesium after 65
Keep the dose modest
The upper limit for adults is 350 mg a day of magnesium from supplements and medicines. Food does not count toward it (NIH). Count every product you take, including multivitamins and calcium-magnesium combos.
Pick a form that sits well
Too much magnesium from pills most often causes diarrhea. Start low, and take less or split the dose if your stools loosen.
Know what the testing list checks
USP Verified and NSF/ANSI 173 check the label. Informed Sport tests every batch for drugs banned in sport, which is not a label check.
5 magnesiums compared by cost
Cheapest per 200 mg first, at each brand’s own price checked October 14, 2026. Amazon prices differ.
| Magnesium | Cost per 200 mg | Why it is or is not the pick |
|---|---|---|
| NOW Magnesium Glycinate Powder300 mg in 1 level teaspoon · No testing list | $0.21 | A powder; take a smaller amount |
| Nature Made Magnesium Citrate250 mg in 2 softgels · USP Verified | $0.31 | Costs less; can loosen stools |
| Revive MD Magnesium Glycinate200 mg in 2 capsules · Informed Sport | $0.33 | Our pick: glycinate, modest dose |
| Nature’s Truth Magnesium Glycinate200 mg in 2 capsules · NSF/ANSI 173 | $0.35 | The label check; costs a little more |
| Thorne Magnesium Glycinate120 mg in 1 capsule · NSF/ANSI 173 | $0.48 | Smaller capsules, 120 mg each |
Questions people ask
How much magnesium should a senior take?
The same as any adult: 420 mg a day for men and 320 mg for women, from food and pills together. The number does not rise with age (NIH). The full dosage guide for seniors.
Is 400 mg of magnesium too much for a senior?
From pills, it is above NIH’s upper limit, which mostly means a higher chance of diarrhea. Food does not count toward that limit. If you have kidney disease, extra magnesium can build up, so ask your doctor before taking any (NIH).
Does magnesium help older adults sleep?
A little, maybe, and the evidence is low quality. In 3 trials of 151 older adults with insomnia, people on magnesium fell asleep about 17 minutes faster than on placebo; total sleep time did not change significantly (Mah 2021).
Will magnesium stop leg cramps at night?
Probably not. A Cochrane review found magnesium unlikely to help typical cramps in older adults (Garrison 2020). Talk to your doctor about cramps.
How we picked
We looked for a form and dose that suit older adults: a modest amount of magnesium, under the pill limit, in a form that is gentle on the stomach. Of those, we chose the one with a public testing record at a fair cost, and we show the rest by cost per 200 mg. The full numbers are in the magnesium guide for seniors. For every pick, see the best magnesium overall or the magnesium guide.
Sources
- NIH Office of Dietary Supplements. "Magnesium: Fact Sheet for Health Professionals." ods.od.nih.gov (older adults, intakes, kidneys, interactions; updated January 6, 2026, read October 14, 2026).
- Testing lists, read October 14, 2026: Informed Sport, Revive Magnesium Glycinate; USP Verified products (Nature Made Magnesium Citrate); NSF/ANSI 173, Nature’s Truth Magnesium Glycinate; NSF/ANSI 173 (Thorne).
- Mah J, Pitre T. Oral magnesium supplementation for insomnia in older adults. BMC Complement Med Ther. 2021. PubMed 33865376
- Garrison SR, et al. Magnesium for skeletal muscle cramps. Cochrane Database Syst Rev. 2020. PubMed 32956536
- Prices: each brand’s own list price for the bottle we link (Revive MD’s own store), checked October 14, 2026.