Several effects become more noticeable across the retatrutide dose range
always discuss any changes with your treating doctor
When I met with Sinclair, he told me he is gearing up to publish a paper about how his lab reversed aging in rodents

Persistent vomiting that prevents you from keeping down food or fluids, leading to dehydration Signs of dehydration , including dark urine, dizziness, reduced urination, or extreme thirst, which may lead to acute kidney injury Vomiting blood or passing black, tarry stools, which may suggest gastrointestinal bleeding Severe allergic reactions , such as difficulty breathing, facial swelling, or widespread rash (call 999 or go to A&E immediately) Signs of intestinal obstruction : progressive abdominal distension, severe constipation, inability to pass gas, persistent vomiting Contact your GP or prescribing clinician if: Nausea or vomiting persists beyond the first few weeks after a dose increase You experience significant unintentional weight loss beyond your target or cannot maintain adequate nutrition Gastrointestinal symptoms significantly impact your quality of life or daily functioning You develop new or worsening symptoms of gastroparesis, particularly if you have diabetes You notice changes in blood glucose control (for patients with diabetes) You experience symptoms of gallbladder problems, such as pain in the upper right abdomen, yellowing of skin or eyes, or fever Patients should also inform their healthcare provider if they are taking other medications that affect gastric emptying

Nutritional supplementation with l-carnitine could mitigate these pathophysiological processes by inhibiting NF-B and down-regulating NOX1/NOX2, thereby enhancing the antioxidant effects of angiotensin II 636
That's thought to support higher cellular energy production, faster tissue repair, better metabolic efficiency and greater resistance to oxidative stress, which is foundational to the whole regenerative and longevity picture