Patients using oral contraceptives should be advised that tirzepatide may reduce contraceptive effectiveness, particularly during dose escalation periods, and additional contraceptive methods may be needed
That is why oral trials use gram-scale totals (1.8-2 g/day is typical) to land a meaningful amount in circulation

Creating topical GHK-Cu serum 1% GHK-Cu serum (common strength): 50mg GHK-Cu powder Mix with 5g (5ml) carrier (hyaluronic acid serum, gel) Creates 1% concentration Apply daily to face 2% GHK-Cu serum (stronger): 50mg GHK-Cu powder Mix with 2.5g carrier Creates 2% concentration More powerful but can irritate Carrier options: Hyaluronic acid serum (best) Aloe vera gel Water-based serum Niacinamide serum How to make: Purchase quality carrier serum Add GHK-Cu powder to serum Mix thoroughly until dissolved Store in dark bottle Refrigerate Use within 30 days Topical application protocol Daily application: Cleanse face thoroughly Apply 2-3 drops serum to face and neck Massage gently until absorbed Morning and/or evening Follow with moisturizer if desired Where to apply: Entire face Neck and dcolletage Around eyes (careful, avoid in eyes) Forehead wrinkles Any area with aging concerns Expected results: Week 4-6: Skin texture improving Week 8-10: Visible firmness increase Week 12+: Wrinkle reduction, tone improvement Combining with skincare: Use GHK-Cu before moisturizer Can combine with retinol (see timing below) Compatible with vitamin C, niacinamide Use SPF during day (always) See our can you use peptides and retinol together , hyaluronic acid peptide , and copper peptides ruined my skin guide

"Total mass may come down, but you'll probably lose as much muscle as you will fat, so whilst you might get a very temporary, and this is only speculative, increase in watts per kilo that will shortly be followed by a big drop in total capacity to produce watts," said Impey