Exact size ?
Most people agree 4mm is plenty for almost everyone
4mm works even for higher body fat depth isn’t an issue.
Longer needles don’t mean better absorption with insulin pens
Less pain is the biggest advantage of shorter needles
Injection technique matters more than needle length
Short needles lower the risk of accidentally going intramuscular
Angle and site rotation matter more than length debates
Consistency improves when injections are more comfortable.
4mm works well for abdomen thigh and delts.
Even larger users report no absorption issues with 4mm
Short needles help reduce injection anxiety long-term
