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forum thread Posted by LolaBunny21 | Staff • Jun 19, 2025
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forum thread Posted by LolaBunny21 | Staff • Jun 19, 2025

100-Count Nature's Bounty Magnesium Mineral Supplement (500mg) $4.68 w/ S&S + Free Shipping w/ Prime or on $35+

$4.68

$9.07

48% off
Amazon
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Amazon [amazon.com] has 100-Count Nature's Bounty Magnesium Mineral Supplement (500mg) for $6.70 - 5% off when you checkout via Subscribe & Save - 25% off when you clip the coupon [amazon.com] on product page = $4.68. Shipping is free w/ Prime or on orders $35+.
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Amazon [amazon.com] has 100-Count Nature's Bounty Magnesium Mineral Supplement (500mg) for $6.70 - 5% off when you checkout via Subscribe & Save - 25% off when you clip the coupon [amazon.com] on product page = $4.68. Shipping is free w/ Prime or on orders $35+.

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Model: Nature's Bounty Magnesium Tablets - 500mg, 100 ct

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Jun 19, 2025
17 Posts
Joined Dec 2023
Jun 19, 2025
MotherboardJared
Jun 19, 2025
17 Posts

Our community has rated this post as helpful. If you agree, why not thank MotherboardJared

Not a terrible price but it's because this is derived from magnesium oxide. It has the worst bioavailability and is much less absorbable than other forms of magnesium on the market. But it's cheaper so you'll find it in most supplements or multivitamins. Not going to hurt you but might be better to spend the money to get a better one.
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Jun 19, 2025
874 Posts
Joined Nov 2023
Jun 19, 2025
Ck2hi
Jun 19, 2025
874 Posts

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This will be a laxative for many ppl just fyi
2
Jun 20, 2025
5 Posts
Joined Jul 2021
Jun 20, 2025
Big_Sur
Jun 20, 2025
5 Posts

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Magnesium Glycinate is better which improves sleep, calm nervous system and helps with muscle function. Usually comes on sale at Costco
2
Jun 20, 2025
154 Posts
Joined Sep 2023
Jun 20, 2025
FabulousScent4192
Jun 20, 2025
154 Posts

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Magnesium oxide Poor Absorption Rate (~30% bioavailability)
1
Jun 21, 2025
116 Posts
Joined Mar 2023
Jun 21, 2025
UniqueHamster817
Jun 21, 2025
116 Posts

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Quote from Big_Sur :
Magnesium Glycinate is better which improves sleep, calm nervous system and helps with muscle function. Usually comes on sale at Costco

Also, look into Magnesium Threonate. I believe it's the only form that can cross the blood brain barrier which can apparently support brain function better than other forms.
1
Jun 25, 2025
199 Posts
Joined Jul 2019
Jun 25, 2025
RobbyDaBank
Jun 25, 2025
199 Posts
The bioavailability of magnesium oxide is around 3-4%. It's one of the least bioavailable formulations of any vitamin/mineral. The label claims it has 500 mg of elemental magnesium, but because it's so poorly absorbed your body will only be able to use around 15 mg, out of the 300/400 mg RDA for women/men.
Last edited by RobbyDaBank June 25, 2025 at 03:51 PM.
Jun 25, 2025
199 Posts
Joined Jul 2019
Jun 25, 2025
RobbyDaBank
Jun 25, 2025
199 Posts
Quote from FabulousScent4192 :
Magnesium oxide Poor Absorption Rate (~30% bioavailability)

It's even worse: 3-4%.

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Last Thursday
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daniel5812
Last Thursday
130 Posts
Quote from MotherboardJared :
Not a terrible price but it's because this is derived from magnesium oxide. It has the worst bioavailability and is much less absorbable than other forms of magnesium on the market. But it's cheaper so you'll find it in most supplements or multivitamins. Not going to hurt you but might be better to spend the money to get a better one.
yes the magnesium oxide is truly only good for those who are suffering from constipation and the cereals also use the magnesium oxide also as well.

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