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Dr. Hall’s Notes

Topic

Supplements

23 pieces in this topic.

The Best Supplements for GLP-1 Hair Loss

Supplements

The Best Supplements for GLP-1 Hair Loss

The shedding starts two to four months after the loss speeds up, which is why almost nobody connects the two. Seven supplements ranked — and one of them interferes with the blood test that rules out a heart attack.

Sep 20268 min
Best Bone Health Supplements on a GLP-1

Supplements

Best Bone Health Supplements on a GLP-1

Bone is the tissue nobody thinks about until a wrist breaks. Rapid weight loss reduces bone mineral density, the effect is largest in exactly the people most likely to be prescribed these drugs, and none of it produces a symptom until it does.

Sep 20267 min
Best Blood Sugar Supplements on a GLP-1

Supplements

Best Blood Sugar Supplements on a GLP-1

You are already taking the most effective glucose-lowering drug most people will ever be prescribed. That changes what a supplement is for here — and it makes the hypoglycemia question the first one, not the last.

Aug 20268 min
The Best Supplements for Ozempic Face

Supplements

The Best Supplements for Ozempic Face

Start with the uncomfortable part: the face looks hollow because the fat in it is gone, and no supplement puts fat back. Seven products ranked anyway — honestly, with the evidence each one actually has.

Aug 20268 min
The Best Gut Health Supplements on a GLP-1

Supplements

The Best Gut Health Supplements on a GLP-1

A different question to which probiotic is best. When food volume halves, the bacteria that live on that food lose their substrate too — seven products ranked on whether they feed the microbiome or just add to it.

Aug 20267 min
The Best Multivitamins for GLP-1 Users

Supplements

The Best Multivitamins for GLP-1 Users

The closest studied model for eating 800 calories a day is not dieting — it is bariatric surgery, where micronutrient monitoring is routine and nobody is embarrassed about taking a two-a-day. Seven multivitamins ranked on that logic.

Aug 20267 min
Best Supplements for Loose Skin After GLP-1

Supplements

Best Supplements for Loose Skin After GLP-1

Skin that has been stretched for fifteen years does not spring back because you took collagen. Seven products ranked honestly, and a clear line between the laxity a supplement can touch and the kind only a surgeon can.

Aug 20267 min
The Best Magnesium Supplements on a GLP-1

Supplements

The Best Magnesium Supplements on a GLP-1

Which magnesium salt you buy decides what the supplement does. On these drugs that choice inverts the usual advice — the poorly absorbed forms everyone warns you about are often the ones you want.

Aug 20267 min
The Best Supplements for Training on a GLP-1

Supplements

The Best Supplements for Training on a GLP-1

Lifting is the single highest-value thing you can do on these drugs, and it is also the thing your appetite is actively working against. Seven products ranked for the specific problem of fuelling a session you do not want to eat for.

Jul 20267 min
The Best Electrolytes for GLP-1 Users

Supplements

The Best Electrolytes for GLP-1 Users

Thirst goes quiet along with hunger, and about a fifth of your daily water used to arrive inside food you are no longer eating. Seven products ranked — and a clear line between the ones for an ordinary Tuesday and the one for a week with vomiting.

Jul 20268 min
Best Supplements for Dizziness on a GLP-1

Supplements

Best Supplements for Dizziness on a GLP-1

The most common cause of light-headedness on these drugs is not a supplement deficiency. It is a blood pressure medication that was exactly right forty pounds ago. Read that part before you buy anything.

Jul 20266 min
The Best Probiotics for GLP-1 Users

Supplements

The Best Probiotics for GLP-1 Users

The weakest-evidenced item in this series, ranked honestly. Probiotics work at the level of the strain, not the brand — and most of what is sold to GLP-1 users is a CFU number attached to bacteria nobody has studied for anything you have.

Jul 20266 min
The Best Sleep Supplements on a GLP-1

Supplements

The Best Sleep Supplements on a GLP-1

Sleep changes on these drugs, and not only for the better. Seven products ranked — with a section on the two causes worth excluding first, because one of them improves as you lose weight and the other gets missed for years.

Jun 20266 min
The Best Fiber Supplements on a GLP-1

Supplements

The Best Fiber Supplements on a GLP-1

Nausea fades. Constipation tends not to. Seven fiber supplements ranked on the axis that actually matters when your stomach is already emptying slowly — how much gas they make on the way through.

Jun 20267 min
The Best Supplements for GLP-1 Leg Cramps

Supplements

The Best Supplements for GLP-1 Leg Cramps

They arrive at two in the morning, in the calf, in month three. Seven products ranked — and a section on the two causes that are not a mineral shortfall at all, one of which is the statin you were already taking.

Jun 20267 min
The Best Creatine for GLP-1 Users

Supplements

The Best Creatine for GLP-1 Users

Cheap, boring, and among the best-evidenced supplements in existence — with two quirks that matter more on a GLP-1 than anywhere else: it makes the scale go up in week one, and it makes your creatinine look worse on a blood test.

Jun 20267 min
The Best Protein Powders for GLP-1 Users

Supplements

The Best Protein Powders for GLP-1 Users

On 800 calories a day, protein stops being a preference and becomes arithmetic. Seven powders ranked on the two numbers that matter — protein per 100 calories, and leucine per scoop — plus whether you can still stand the taste in month four.

May 20266 min
The Best Supplements for GLP-1 Diarrhea

Supplements

The Best Supplements for GLP-1 Diarrhea

Less common than constipation and more urgent when it happens. Seven products ranked — plus the two causes that look like drug side effects and are not, one of which follows the gallbladder trouble these drugs are known for.

May 20267 min
The Best Iron Supplements

Supplements

The Best Iron Supplements

The one supplement on this site with a firm rule attached: do not take it without a ferritin result. Seven ranked on elemental iron, and on the side effect that will make you stop — constipation, on a drug that already causes it.

May 20266 min
The Best Omega-3 Supplements

Supplements

The Best Omega-3 Supplements

The one supplement most likely to repeat on you when your stomach empties slowly, which is a shame, because it is also one of the better-evidenced things on the shelf. Seven ranked on EPA and DHA per capsule, and on freshness.

May 20265 min
What Supplements to Take on a GLP-1

Supplements

What Supplements to Take on a GLP-1

Your appetite fell off a cliff. Your nutrient requirements did not. This is the short list of supplements that have an actual rationale on these drugs, the longer list that does not, and the tests worth doing before you buy anything.

May 20267 min
The Best Vitamin D Supplements

Supplements

The Best Vitamin D Supplements

The one nutrient where guessing the dose is genuinely common and genuinely wrong in both directions. Seven ranked — and the case for testing before you buy any of them.

May 20265 min
The Best Supplements for GLP-1 Nausea

Supplements

The Best Supplements for GLP-1 Nausea

It peaks in the week after a dose increase and fades as you hold. Seven products ranked for that specific window — and an honest note that the most effective intervention is not a supplement at all, it is a slower titration.

Apr 20266 min