Topic

Peptide side effects

Every medication that does something can do something unwanted. These articles catalogue peptide side effects and those reported for GLP-1 medications — nausea, injection-site reactions, and the rarer things worth knowing about — plus what researchers report about how long effects last and what tends to help.

Honest side-effect information is a feature, not a liability: it's how you and your provider decide together whether a treatment fits. Where an effect has its own article — nausea, hair shedding, fatigue — you'll find the detail there.

5 articles on this topic

  1. A woman with loosely tied hair pauses over tea at a sunlit table with a wooden hairbrush nearby

    Does Tirzepatide Cause Hair Loss?

    In the pivotal 72-week obesity trials, hair loss was reported by about 3%–7% of tirzepatide groups versus about 1% with placebo. Weight-loss-related telogen effluvium is the leading explanation, but a direct drug effect has not been ruled out.

    August 18, 2026 · Priya Raman, Health Writer
  2. A woman pauses mid-thought over an open notebook at a wooden desk by a sunlit window

    BPC-157 Side Effects and the Evidence Gap

    Fewer than 30 people have taken BPC-157 in a published human study. That number, more than any list of symptoms, is the honest answer to what its side effects are.

    August 15, 2026 · Priya Raman, Health Writer
  3. A man in a grey t-shirt reads a book in bed under cream linen bedding in low warm lamplight

    Sermorelin Side Effects, by the Numbers

    About one patient in six gets a reaction where the needle went in. Almost everything else on the list occurs in under 1% — but the trial data behind those numbers comes from a population that may not look like you.

    August 15, 2026 · Julian Reyes, Health Writer
  4. A man slices fresh vegetables at a sunlit kitchen counter, bowls of produce beside him

    Tirzepatide Side Effects, From Common to Rare

    Gastrointestinal effects are the ones almost everyone asks about — and across the tirzepatide dose range they affect 39% to 49% of people, concentrated in the weeks when the dose is going up.

    August 15, 2026 · Julian Reyes, Health Writer
  5. A man prepares a light, colorful meal of vegetables and grains at a stone kitchen counter in soft morning light

    Semaglutide Side Effects, From Common to Rare

    Across pooled STEP-trial safety data, only 4.3% of adults taking semaglutide 2.4 mg stopped treatment because of gastrointestinal side effects.

    August 14, 2026 · Elena Marsh, Health Writer