Not medical advice. Talk to your provider before using any peptide.
Full disclaimerPeptide Schedule Research TeamReviewed Apr 20266 Citations
Bonothyrk6 residuesAEDLRGEach bubble = one amino acid. Size = residue mass. Color = chemical class.Bonothyrk (A-21) is a Khavinson parathyroid bioregulator taken as oral capsules for 30-day courses. One unindexed observation in 33 women showed improved bone density markers. Community reports focus on reduced muscle cramping. Effects persist months after stopping. Research is extremely limited.
10mcg · Daily
Summary: Add 0mL BAC water to your 20mg vial. Draw to < 0.1 units on a U-100 syringe for a 10mcg dose. This vial will last 0 doses.
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| Level | Dose / Injection | Frequency |
|---|---|---|
| Beginner | 10mg | Daily |
| Moderate | 10mg | 2x Daily |
| Aggressive | 20mg | 2x Daily |
Each capsule contains 10 mg of the parathyroid peptide complex (A-21). No reconstitution, no syringes, no bacteriostatic water. Oral capsule. The 20-cap box provides one 10-day conservative course at 20 mg/day (2 capsules). The 60-cap box covers a full 30-day course at that same dose. Running the aggressive 40 mg/day protocol burns 4 capsules daily; you'll need two 60-cap boxes for one course. Take capsules with food. Fasted dosing is the main cause of GI complaints. Morning and midday with meals; skip the evening dose. You won't feel this working. The mechanism is epigenetic gene expression modulation in parathyroid cells. There's no acute signal, no mood change, no energy shift. Muscle cramp reduction around week 2 is the earliest subjective marker. Bone outcomes require DEXA imaging at 6 months. Don't bump the dose because nothing "happened" by day 10. Check serum calcium before starting. If it's above 10.2 mg/dL, don't start. Buy from CosmicNootropic, RuPharma, or QiSupplements; avoid Amazon and eBay listings.
Dosing based on Khavinson Institute protocol — 10 published references.View all sources →
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Pricing updated 2026-04-09
Prices are estimates and vary by source, location, and prescription status.Full pricing breakdown →
Disclaimer: This curve is a simplified first-order exponential decay model. Actual pharmacokinetics vary based on injection site, individual metabolism, body composition, and other factors. Half-life values are approximate and based on available preclinical and clinical literature. Many research peptides lack formal human pharmacokinetic studies. This is for educational purposes only — not medical advice.
Bonothyrk (A-21) is a Khavinson parathyroid bioregulator taken as oral capsules for 30-day courses. One unindexed observation in 33 women showed improved bone density markers. Community reports focus on reduced muscle cramping. Effects persist months after stopping. Research is extremely limited.
