This is going to be long but I feel likes its a very interesting post (Blood pressure and Supplement Communities)
I'm 18M, 6 ft, 95 kg, and I've had a pretty strange experience with magnesium, hypertension, and sleep over the past few years. Even my cardiologist was surprised by what happened, so I'm hoping someone here might have experienced something similar.
2023–2024: How it all started
Around three years ago, I started taking magnesium simply because I'd heard about its health and sleep benefits.
I initially tried Tata 1mg ZMA+ (400 mg magnesium oxide), followed by another magnesium oxide supplement. Both caused some initial diarrhea, but I genuinely noticed improvements in my sleep and overall well-being.
Eventually, I switched to Trexgenics magnesium bisglycinate after hearing it was better absorbed. The digestive issues disappeared, but looking back, I'm not sure the sleep benefits were nearly as noticeable.
I continued taking magnesium on and off over the following years, sometimes going months without it.
Around 2024, I also started occasionally experiencing heaviness in my chest or arms and becoming unusually aware of my heartbeat. Worried about hypertension, I checked my blood pressure regularly for several weeks. Surprisingly, it was always normal, usually below 120/80, with a resting heart rate of 70–80 bpm. Eventually, the sensations disappeared, and I forgot about them.
November 2025: My blood pressure suddenly became elevated
Fast-forward to November 2025.
During two separate hospital visits on the same day, both doctors noticed that my blood pressure was elevated. They initially thought it might be anxiety or stress, but I wasn't particularly nervous.
Concerned, I started monitoring it at home, and my readings were consistently around 140–150/90–100.
I eventually visited a cardiologist, who ordered a 24-hour ambulatory blood pressure test. It confirmed hypertension. Since I was dealing with board exams and university applications around that time, he suspected stress might be contributing and suggested repeating the test after a month.
During that month, I happened to restart magnesium bisglycinate, completely unrelated to my blood pressure.
To my surprise, my readings dropped back towards normal.
I assumed the problem had resolved and, unfortunately, didn't return for the follow-up.
However, after I eventually ran out of magnesium and stopped taking it, my blood pressure gradually returned to the same elevated range.
August 2026: Things got much worse
Several months later, shortly before moving to Hong Kong for university, I decided to get everything checked again.
I visited an internal medicine specialist, who ordered another 24-hour blood pressure test.
This time, the results were genuinely alarming.
Almost every reading was elevated, including during sleep. reading were pretty consistently around 180/130 , and the only low reading I remember was approximately 150/89.
The doctor was understandably concerned, especially considering my age, and prescribed Olmetec (olmesartan) 20 mg.
I took it for two days before finally managing to see my original cardiologist.
He reviewed my results and ordered further investigations, including kidney-related blood tests, an ECG, an echocardiogram, and other bloodwork to look for possible underlying causes.
Everything came back normal. There was no apparent structural heart problem, and the investigations didn't reveal an obvious explanation for my hypertension.
I also explained what had happened months earlier when I restarted magnesium. He found it interesting and suggested trying it again while monitoring my readings.
And almost immediately, my blood pressure dropped again.
After restarting magnesium bisglycinate, my readings returned to approximately 128–130/76–80.
My cardiologist was genuinely surprised by the improvement. Given the results, he decided to monitor me without continuing antihypertensive medication for the time being. He asked me to regularly record my blood pressure and send him updates.
Of course, I realize this doesn't prove magnesium caused the improvement, especially since I'd briefly taken olmesartan. But what confuses me is that this apparent pattern has happened more than once: my blood pressure was high, I restarted magnesium, it dropped, I eventually stopped magnesium, and the high readings returned.
October 2026: My current situation
I've now been living in Hong Kong for approximately ten weeks, taking magnesium bisglycinate consistently.
My blood pressure has generally remained around 130/80, which is a huge improvement compared with August.
However, two things are bothering me.
First, my resting heart rate has increased significantly. Even when my blood pressure was extremely high, my pulse was usually 70–80 bpm. Now it's consistently around 95–110 bpm, sometimes accompanied by a noticeable pounding sensation in my chest.
Second, my sleep has actually been pretty bad, despite taking magnesium every day.
I frequently struggle to fall asleep, wake up randomly throughout the night, and rarely feel like I've slept particularly well. Some nights, I'll fall asleep normally, wake up shortly afterward, and struggle to get back to sleep for hours.
Interestingly, I remember getting much more noticeable sleep benefits from the cheaper magnesium oxide supplements than from bisglycinate.
I've seen people discussing sleep disturbances associated with magnesium glycinate, but I'm not sure how much evidence supports that.
A little more medical background
Mentally, I'm doing well. I don't have depression or any significant ongoing stress. I experience occasional everyday anxiety, like most people, but nothing particularly intense or disruptive. Even when my blood pressure was at its highest, I generally felt mentally fine.
One other detail: my first kneecap dislocation happened in December 2024. Since then, I've experienced approximately seven dislocations (five right, two left), eventually requiring arthroscopic surgeries in February and August 2026. My knees remain somewhat unstable, and I've wondered whether ongoing physical stress or recovery might have contributed to my hypertension. I have no evidence they're connected, but thought it was worth mentioning.
So, here are my main questions:
- Hypertension: Has anyone experienced such a dramatic improvement in blood pressure with magnesium? What could explain it, and are there further investigations for secondary hypertension worth discussing with my cardiologist?
- Heart rate: Why might my resting heart rate have increased from 70–80 to 95–110 bpm while my blood pressure decreased? Could these changes be connected?
- Sleep: Could magnesium bisglycinate actually be worsening my sleep? Why might magnesium oxide have seemed better, and would a different form or timing make sense?
I'm particularly interested in hearing from anyone who's experienced something similar or understands the possible physiology behind it.
I know magnesium isn't a substitute for proper hypertension treatment, and I'm continuing to monitor my readings under my cardiologist's guidance. I'm just genuinely curious about what's happening and why the difference seems so significant.
Thanks to anyone who takes the time to read this. I'd really appreciate your thoughts.