Bioavailability in plain English, why pills and drops struggle, whether the shot hurts, and where to inject.
Find Your Body ProtocolTirzepatide is a peptide, and stomach acid and digestive enzymes break peptides down before much of them can be absorbed. Injected just under the skin, it skips the gut: U.S. prescribing information lists its bioavailability (how much of a dose your body can use) at about 80%. There is no approved oral form of Tirzepatide, and drops, tablets or “sublingual” versions sold online have no good evidence on how much gets absorbed. That’s why MANE & STEEL only offers the once-weekly injection, with a short, thin insulin-style needle.
Bioavailability is how much of a dose actually reaches your bloodstream where it can work. Injected just under the skin, Tirzepatide skips your digestive system, and U.S. prescribing information lists its bioavailability at about 80%. A medication you can count on absorbing is a medication your physician can dose precisely.
Same thinking as dutasteride on the hair side: we keep it simple and build around the evidence. Tirzepatide was developed, studied and approved as a once-weekly injection, so that’s the form we offer. Why Tirzepatide →
Your gut is built to break proteins down. Stomach acid and digestive enzymes chop peptides apart before much of them can be absorbed. That’s why oral semaglutide tablets, a different medication, need an absorption booster, an empty stomach and a 30-minute wait before food or other medicines, and even then less than 1% of each dose is absorbed, per its prescribing information.
There is no approved oral form of Tirzepatide. Brand-name Tirzepatide (Zepbound and Mounjaro) comes only as an injection. Some companies sell Tirzepatide drops, tablets or “sublingual” versions, but there’s no good evidence on how much of them gets absorbed, and the FDA has warned about unapproved GLP-1 products. We don’t sell them.
The needle is tiny: a short, thin insulin-style needle that goes just under the skin, not into muscle. For most people it’s a quick pinch, if they feel it at all. It takes seconds, once a week.
Prescription required. A licensed physician decides whether compounded Tirzepatide is appropriate for you, and your dose.
Boxed warning: risk of thyroid C-cell tumors. In animal studies, Tirzepatide caused thyroid C-cell tumors. It is unknown whether it causes these tumors, including medullary thyroid carcinoma (MTC), in people. Do not use Tirzepatide if you or a family member have ever had MTC, or if you have Multiple Endocrine Neoplasia syndrome type 2 (MEN 2).
Possible serious side effects include inflammation of the pancreas (pancreatitis), gallbladder problems, low blood sugar (especially with insulin or a sulfonylurea), kidney problems from dehydration and serious allergic reactions.
The most common side effects are nausea, diarrhea, vomiting, constipation, stomach pain, indigestion and decreased appetite.
Compounded medications are not FDA-approved. The FDA does not review compounded drugs for safety, effectiveness or quality. Compounded Tirzepatide is prepared by Strive Pharmacy, a state-licensed 503A compounding pharmacy. Not available in Arkansas, Indiana or South Carolina.
Two minutes of questions, then a short medical intake. A licensed physician decides whether compounded Tirzepatide is appropriate for you, and your dose. Not approved? Full refund.