Nobody tells you what the first two weeks feel like. Your doctor hands you a prescription and maybe a pamphlet. The internet gives you extremes. Most people land somewhere in the middle — and knowing what's coming makes it a lot less alarming.
Most GLP-1 prescriptions come with zero guidance on managing side effects through food. No injection-day eating plan, no protein targets. This post exists because that gap is real.
What's Happening in Your Body During Week 1
GLP-1 medications mimic hormones your gut releases after eating — signaling your brain that you're full, slowing digestion, and reducing appetite. The side effects come from the same mechanism acting on parts of your body that weren't the primary target.
Most women notice appetite suppression within 48–72 hours of the first injection. Days 3–7 tend to be the hardest — the medication is at peak concentration. Nausea, fatigue, and headaches at this stage are not a sign something is wrong. They're a sign the drug is working.
"44% of GLP-1 users experience nausea in the first four weeks. The vast majority are mild to moderate and resolve with dose titration."
What to Eat in the First Two Weeks
The general rule: small amounts, protein first, every 3–4 hours. Not because you'll be hungry — you probably won't be — but because your body still needs fuel.
| Works well | Usually doesn't |
|---|---|
| Cold Greek yogurt, cottage cheese | Greasy or fried foods |
| Scrambled eggs, soft-boiled eggs | Heavy sauces, spicy dishes |
| Plain crackers with nut butter | Carbonated drinks |
| Mild fish (tilapia, cod, salmon) | Alcohol (especially week 1) |
| Bone broth, miso soup | Large portions eaten quickly |
| Banana, plain rice, oatmeal | Fatty red meat right now |
On injection day, eat lighter and earlier. A small bland meal a couple of hours before injecting takes a lot of the edge off. Keep plain crackers on your nightstand for the morning after — when nausea often peaks.
Side Effects: What's Normal and What's Not
- Nausea, especially after eating or in the morning — normal
- Dramatically reduced appetite — normal
- Fatigue or brain fog after injections — normal
- Severe persistent vomiting or upper abdominal pain — call your doctor
Your Week-by-Week Action Checklist
Week 1
- Take your first injection as prescribed.
- Eat within 2 hours of waking, even if it's just Greek yogurt.
- Drink at least 8 glasses of water daily.
- Note which foods sit okay — you'll use this in week 2.
Week 2
- Start paying attention to protein intake — most women need 80–120g daily.
- Add one short resistance session, even bodyweight squats.
- Eat protein first at every meal.
Members get a week-by-week guide for the first month — injection-day meal plans, protein targets, and Dr. Kanev's side effect management guide.
See what's included →Continue to Part 2: Managing GLP-1 Nausea With Food →