Expected vs. experienced common side effects of GLP–1s:
2026 Healthline
GLP–1 Consumer Survey
Reported
Anticipated
Heartburn
Dizziness
20%
35%
20%
23%
26%
32%
Headache
29%
32%
Fatigue
9%
23%
Rapid heart rate
or palpitations
25%
39%
Diarrhea
34%
67%
Injection site
reactions
34%
67%
Nausea
or vomiting
Other side effects:
16%
6%
No listed physical
side effects
12%
10%
Feeling cold
13%
11%
Insomnia or
vivid dreams
25%
24%
Constipation
17%
10%
Sulfur burbs
and gas
Expectations come from respondents considering a GLP–1; reported experiences come from people both formerly and currently taking a GLP–1.
2026 Healthline GLP–1 Consumer Survey – Sample size: 1,007 total
= 720 currently taking a GLP–1, 203 took a GLP–1 in the past, 84 currently considering a GLP–1. 53% female and 47% male.
2026 GLP–1 Consumer Survey
