Why I Take Two Different Magnesium Supplements (Morning + Night)
Magnesium is one of those supplements that gets talked about constantly in chronic illness spaces — and for good reason. It supports muscle relaxation, nerve function, sleep, and even cognitive health.
But here's what a lot of people don’t know - there are multiple types of magnesium. And they do different things!
After trial and error (and a lot of research), I’ve been on a two-supplement Mg routine for a while now:
·Kappa Nutrition Magnesium L-Threonate Complex in the morning
· Nature's Bounty Magnesium Glycinate at night
Here's why I take both, and how they work differently.
Kappa Nutrition Magnesium L-Threonate (My Morning Pick)
What makes it different: L-Threonate is formulated to cross the blood-brain barrier more effectively than other forms of magnesium. That means it's specifically targeting cognitive function — memory, clarity, and brain health.
What's in it: Kappa Nutrition uses a blend called Magbrain™, which combines three forms — L-Threonate, Bisglycinate, and Malate. So you get brain support plus the muscle and energy benefits of the other forms.
Why I take it in the morning: Brain fog is real with POTS and EDS. I need help with focus (hello ADHD!) and clarity during the day. Taking this in the morning (with breakfast and a big glass of water) has made a huge difference in how I feel.
Nature's Bounty Magnesium Glycinate (My Nighttime Pick)
This is the more "standard" magnesium supplement, and for good reason. Glycinate is known for being gentle on the stomach and highly absorbable.
What makes it different: Glycinate is bound to the amino acid glycine, which has calming properties. That's why it's so commonly recommended for sleep and relaxation.
Why I take it at night: My muscles are tight. My nervous system is overactive (thanks, dysautonomia). Glycinate helps with both. I take it about 30 minutes before bed, and it helps me wind down.
Why I Take Both (Not Just One)
Kappa Nutrition gives me L-Threonate (brain) plus Malate (energy) plus some Glycinate. It's a daytime blend.
Nature's Bounty gives me straight Glycinate, which is perfect for nighttime.
Taking both means I get brain support in the morning and muscle/sleep support at night.
IMPORTANT THINGS TO KNOW:
Magnesium can lower blood pressure. For POTS patients who already deal with low blood pressure, this is something to watch. Start with a lower dose and see how you feel.
Both are gluten-free. Celiac safe. Kappa Nutrition is also vegan.
Magnesium can upset your stomach. If you have a sensitive stomach (it’s me, hi), start with one capsule and work up. I've had good luck with both of these — no nausea or digestive issues.
Talk to your doctor. Magnesium interacts with some medications, including certain antibiotics and diuretics. Your doctor can help you figure out the right dose.
TL;DR
If you're only going to take one magnesium supplement, I'd probably recommend glycinate — it's the most well-rounded for sleep, muscles, and general calming.
But if you struggle with brain fog, focus, or cognitive issues (common with POTS and EDS), adding L-Threonate in the morning has been genuinely helpful for me.
My routine:
· Morning: Kappa Nutrition (2 capsules) with breakfast
· Night: Nature's Bounty Glycinate (2 capsules) 30 minutes before bed
It's not the cheapest routine, but magnesium is one of those supplements where quality actually matters. And for me, the improvement in both daytime focus and nighttime sleep has been worth it.
https://amzn.to/4dN4ZAg Kappa Nutrition
https://amzn.to/4fX4Hbm Nature’s Bounty
Disclaimer: I'm not a medical professional. This is my personal experience as someone with a sports medicine background living with POTS, EDS, and celiac disease. Always talk to your doctor before starting new supplements.
This post contains affiliate links. As an Amazon Associate I earn from qualifying purchases.

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