Are NAD+ Injections Safe? Side Effects UK Users Should Know 2026 | MyNad+

Safety is one of the first things UK users ask about before starting NAD+ injections. This guide covers the common, mild reactions, the rarer but more serious ones, and who should speak to a GP before starting.

Common, Mild Side Effects

Most people who use NAD+ injections experience nothing beyond mild, short-lived reactions at the injection site — soreness, redness, or slight swelling. Some users also report temporary flushing, mild nausea, or a headache shortly after a dose, which typically resolves within a day.

Less Common but Serious Reactions

Serious reactions are uncommon but can include allergic responses such as difficulty breathing or facial swelling, and cardiovascular symptoms like irregular heartbeat or chest pain. Anyone experiencing these should stop use and seek medical attention immediately.

Who Should Avoid NAD+ Injections

NAD+ injections are not recommended for pregnant women or those with active cancer, cardiovascular disease, or bleeding disorders, due to limited safety data in these groups. If you have an existing health condition or take regular medication, speak to your GP before starting.

How to Reduce Your Risk

Following the supplied instructions closely — including rotating injection sites, using a new micro-needle each time, and not exceeding the recommended dose — helps minimise the chance of a reaction. If you notice anything unusual, pause use and check with a healthcare professional before continuing.