It's a nonapeptide found in various tissues
Some people cannot absorb the right amount of vitamin B12, despite eating these foods

[7] [8] When to contact your GP: Persistent difficulty achieving or maintaining erections sufficient for sexual activity ED that causes distress or affects your relationship ED accompanied by other symptoms (chest pain, shortness of breath, extreme fatigue) Sudden onset of ED, particularly in younger men When to seek emergency care: Erections lasting longer than 4 hours (priapism) call 999 or go to A&E New severe chest pain during sexual activity call 999 Your GP will conduct a thorough assessment, which typically includes: Medical history exploring cardiovascular risk factors, diabetes, neurological conditions, hormonal issues, and psychological factors Medication review identifying drugs that may contribute to ED Physical examination assessing cardiovascular health, genital examination if indicated Blood tests HbA1c or fasting glucose, fasting lipids, morning (7-11 am) total testosterone with repeat if low/borderline, and consideration of LH/prolactin if hypogonadism is suspected This assessment is crucial because ED can be an early warning sign of cardiovascular disease

I have tried to lose all the extra weight I put on during Covid (about 30lbs) and nothing has worked well as this