The 5 Supplements Every Semaglutide User Should Know About
Medically reviewed by [REVIEWER NAME], [REVIEWER CREDENTIALS] · [REVIEW DATE]
Medical Disclaimer: This article is for educational purposes only. Always consult your prescribing physician before starting any new supplement.
GLP-1 medications work by suppressing appetite — which is great for weight loss, but creates a hidden problem: eating significantly less food means getting significantly fewer nutrients. Here are the five supplements with the strongest evidence base for GLP-1 users.
Creatine Monohydrate
3–5g dailyThe most evidence-backed supplement for preserving lean muscle mass during calorie restriction. Also supports brain function and energy — both commonly affected on GLP-1.
Magnesium Glycinate
200–400mg at nightMagnesium is depleted faster on lower-calorie diets and reduced food intake. The glycinate form is well-absorbed and supports sleep quality, muscle relaxation, and reduces GI cramping.
Vitamin B12
1,000mcg sublingual or 2.4mcg via dietGLP-1 users eating less food often underconsume B12, leading to fatigue, brain fog, and nerve symptoms. B12 deficiency can mimic or worsen GLP-1 side effects.
Vitamin D3 + K2
2,000–5,000 IU D3 + 90–180mcg K2Most adults are deficient. D3 supports bone density, immune function, and mood — all relevant on GLP-1. K2 directs calcium to bones rather than arteries.
Omega-3 Fish Oil
1–2g EPA+DHA dailyAnti-inflammatory and cardioprotective. Omega-3s support muscle protein synthesis and reduce inflammatory markers — especially relevant given the metabolic changes on GLP-1.
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