Semaglutide Dosing: 250mcg/Week Protocol

Semaglutide is a GLP-1 receptor agonist that suppresses appetite, delays gastric emptying, and improves glucose-dependent insulin secretion. It has extensive clinical trial data — FDA-approved for both weight loss and type 2 diabetes.

Research peptide protocols use much lower doses than pharmaceutical formulations due to variable potency and purity. This is not medical advice.

Quick Reference: Standard Protocol

Start at 125 mcg weekly for 2-4 weeks to assess tolerance, then increase to 250 mcg.

For the full semaglutide profile and vendor pricing, see our Semaglutide peptide page.

Cycling Details

Standard cycle: 250 mcg weekly for 8 weeks on, 8 weeks off. The slow titration (125 mcg weeks 1-4, then 250 mcg weeks 5-8) mimics FDA-approved protocols that emphasize gradual increases for tolerability.

Some users extend to 12-16 weeks for significant weight loss goals. A few go to 500 mcg weekly, but most find 250 mcg effective for appetite suppression and weight loss at the research peptide level.

Routes of Administration

Subcutaneous injection is the only route for injectable semaglutide.

• Sites: Rotate between abdomen, thigh, and upper arm. Abdomen tends to have the most consistent absorption.
• Volume: ~0.17 mL with an insulin syringe (29-31 gauge)
• Timing: Once weekly, same day each week
• Do not inject IM — absorption will be too rapid

Reconstitution Quick Reference

Math: 3 mg / 2 mL = 1.5 mg/mL = 1,500 mcg/mL. For 250 mcg: 250 / 1,500 = 0.167 mL = ~17 units.

Swirl gently — do not shake. Refrigerate at 2-8 C, use within 28 days. For step-by-step instructions, see the full Semaglutide Reconstitution Guide.

Where These Numbers Come From

Community research peptide doses are dramatically lower than FDA-approved pharmaceutical doses.

FDA-approved weight loss dose: 2.4 mg/week after titration (0.25 mg → 0.5 mg → 1 mg → 1.7 mg → 2.4 mg). The STEP 1 trial showed 14.9% weight loss at 2.4 mg/week over 68 weeks (Wilding et al., 2021).

FDA-approved diabetes dose: 0.25-1 mg/week maintenance. Cardiovascular benefit demonstrated in SUSTAIN-6 (Marso et al., 2016).

Why community doses are ~10x lower: Research peptides have variable potency and purity compared to pharmaceutical-grade semaglutide (Novo Nordisk). The community starts at doses equivalent to the lowest FDA titration step (0.25 mg) and increases cautiously. Some people are highly sensitive to GLP-1 agonists — starting low allows assessment of individual tolerance.

Stacking Protocols

Do not stack with other GLP-1 agonists (tirzepatide, liraglutide) — overlapping mechanisms increase side effects without proportional benefits. Caution with insulin or diabetes medications (increased hypoglycemia risk).

Side Effects & Safety

• Nausea — 44% in STEP trials, most common side effect, dose-dependent
• Diarrhea — 30% in trials
• Vomiting — 24% in trials
• Constipation — 24% in trials
• Stomach pain — 20% in trials
• Pancreatitis — rare but exists; stop immediately if severe abdominal pain develops
• Gallbladder problems — rapid weight loss increases gallstone risk
• Thyroid C-cell tumors — black box warning based on animal studies; avoid with MTC or MEN 2 history
• Most GI side effects improve within 4-8 weeks and are reduced by slower titration

Frequently Asked Questions

What is the standard semaglutide dose?

250 mcg once weekly, starting at 125 mcg for 2-4 weeks to assess tolerance. Cycle 8 weeks on, 8 weeks off. This is ~10x lower than the FDA-approved 2.4 mg/week weight loss dose.

How do I titrate semaglutide?

Start at 125 mcg weekly for 2-4 weeks, then increase to 250 mcg if well-tolerated. Slow titration minimizes GI side effects.

How long should a semaglutide cycle last?

8 weeks on, 8 weeks off. Some extend to 12-16 weeks for significant weight loss.

What time of day should I inject semaglutide?

Morning on an empty stomach. Once-weekly dosing means exact timing isn't critical, but consistency helps.

How do I reconstitute semaglutide?

Add 2 mL BAC water to a 3 mg vial (1.5 mg/mL). 250 mcg = 17 units. Swirl gently, refrigerate, use within 28 days.

Can semaglutide be stacked with other peptides?

Yes — commonly with AOD-9604 or BPC-157. Avoid stacking with other GLP-1 agonists.

Related Guides

• Semaglutide Results Timeline — Week-by-week expectations from first dose through 6 months
• Semaglutide Side Effects: 7 to Watch For — What's normal vs when to stop, with clinical trial data
• Semaglutide Benefits — 8 research-backed effects with clinical trial data
• Semaglutide Reconstitution Guide — Step-by-step mixing and dilution charts
• Semaglutide Bloodwork Guide — What labs to track and optimal ranges
• Semaglutide vs Tirzepatide — GLP-1 vs dual agonist comparison
• Tirzepatide Dosing Guide — Dual agonist alternative
• Retatrutide Dosing Guide — Next-gen triple agonist
• Tesofensine Weight Loss Guide — Alternative weight loss compound
• Calculate Your Semaglutide Cycle Cost — estimate vials needed and total cost for your protocol

References

For educational and research purposes only. This is not medical advice. Research peptides are not FDA-approved for human use.