Start the protocol before you start the injection.
The depletion starts in week one. Hair loss, brain fog, and fatigue show up 60 to 90 days later. Getting ahead of it now changes everything.
The sequenced plan
The timeline that prevents the worst of it.
Week 1
Get baseline labs
Ferritin, B12, vitamin D 25-OH, zinc, TSH. Ask your GP directly. Most won't suggest these without prompting.
Week 2
GP review
Go through your results. Flag any shortfalls. Start correcting low iron or vitamin D now if needed. Don't wait.
Week 4
Start supplement protocol
Once you know your baseline, start the full protocol. Iron, zinc, B complex, vitamin D. Your follicles hold on while levels come back up.
Week 17 — first injection
Start your GLP-1
Your levels are topped up. Your follicles have what they need. The depletion GLP-1 causes happens, but you don't start from empty.
Month 5+
Monitor and adjust
Retest ferritin and zinc at 3 months on the medication. Adjust doses if levels drop. The patients with the least shedding stay on top of this.
Start now
Iron, B12, vitamin D, magnesium, omega-3. Not biotin.
GLP-1 drains these in almost everyone. You don't need to wait for test results to start. These are the five that matter.
Iron
The main driver of GLP-1 hair loss. Start before the depletion takes hold.
B12
GLP-1 slows your gut and reduces B12 absorption within weeks.
Vitamin D
Most people are already low. GLP-1 makes an existing shortfall worse.
Magnesium
Controls sleep, stress, and energy. Eating less drains it faster than anything.
Omega-3
Supports hair follicle health and reduces the inflammatory load from rapid weight loss.
A common mistake
Why not biotin?
Biotin deficiency is rare. The vast majority of people have plenty. Supplementing with 5,000mcg gummies does nothing for a nutrient you're not missing.
GLP-1 shedding is driven by iron, zinc, and vitamin D depletion. Not biotin. Spending money on the wrong thing while the real depletions go uncorrected is the most common mistake patients make.
What actually depletes on GLP-1
"Most people don't think about hair, sleep, or muscle when they start a GLP-1. Then month 3 hits. This is what to put in place first."
Anagrow Clinical Team
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