B12 injections at CoLaz clinics

A B12 injection delivers a measured dose of vitamin B12, in the form of cyanocobalamin, directly into the muscle, usually the upper outer arm. Vitamin B12 is essential for red blood cell production, nerve function, energy metabolism and the synthesis of DNA. When given by intramuscular injection, the dose bypasses the digestive tract and is absorbed reliably, which matters because dietary B12 absorption depends on stomach acid and a protein called intrinsic factor, both of which decline with age, medication and certain gut conditions. The injection itself takes around ten seconds and the full appointment is under fifteen minutes.

B12 injections suit vegetarians and vegans who do not eat animal foods, patients with confirmed absorption issues such as pernicious anaemia, coeliac disease or significant IBS, older adults whose stomach acid has dropped with age, and patients on long-term metformin or proton-pump inhibitors that lower B12 absorption. They also suit anyone whose energy, mood or focus has dipped without an obvious cause and who wants a reliable top-up alongside a balanced diet. Patients with a clinically diagnosed B12 deficiency should be under GP care for ongoing management; we will ask about this at consultation and coordinate with your GP where appropriate.

Most patients notice a lift in energy and mental clarity within two to seven days of the first injection, though the response is more pronounced in patients who were running low to begin with. Some patients feel a difference within twenty-four hours. The effect of a single shot typically lasts four to eight weeks, depending on diet, lifestyle and how depleted you were at the start. For ongoing support a maintenance schedule of one injection every four to twelve weeks is common, agreed at your free consultation.

The needle used is short and fine, and most patients describe the sensation as a quick pinch or a sharp pressure that lasts about a second. The injection itself takes around ten seconds. Mild soreness at the site for a day or two afterwards is normal and feels similar to the morning after a tetanus or flu jab. There is no recovery pain otherwise, and most patients go straight back to work or to the gym the same day, avoiding only intense upper-body exercise on the treated arm for a few hours.

A single injection at £50 gives a useful boost lasting four to eight weeks. A course of two at £90 spaced two to four weeks apart is a common starter for patients with a more depleted baseline, working out to £45 per session. From there, maintenance is typically one injection every four to twelve weeks depending on diet, absorption and how the response holds. The plan is agreed at your free consultation, with the cadence confirmed in writing before any course is booked.

B12 is a water-soluble vitamin, which means the body excretes any excess in the urine, so the safety profile is very forgiving. Every injection at CoLaz is given by a qualified nurse or doctor, never a non-medical therapist. We do not treat patients with a known hypersensitivity to cobalamin or cobalt, patients with a rare condition called Leber's optic atrophy, or patients who are pregnant or breastfeeding without GP sign-off. We also coordinate with your GP if you have a confirmed B12 deficiency that needs ongoing medical management. There is a £50 consultation fee, redeemable against any injection you book.

A single B12 injection is £50. A course of two is £90, working out to £45 per session, and is the most common starter package. There is a £50 consultation fee with a qualified nurse or doctor, which is redeemable against any injection you book. Pricing is confirmed in writing at your free consultation, with no upsells in the treatment room.