Oral minoxidil may cause dry skin and dark eye bags but doesn't significantly age the skin. Topical minoxidil is toxic to cats, and some users prefer finasteride.
Minoxidil is discussed for its potential to decrease collagen production, with users sharing experiences about skin improvement after stopping its use. Some mention using it on their face for beard growth.
Collagen peptides are recommended for hair and skin benefits, with users noting improvements in hair and skin health. However, evidence on their effectiveness for hair growth is inconclusive.
Minoxidil may improve or worsen skin quality, with topical forms causing dryness and wrinkles, possibly due to alcohol content, while oral forms have fewer side effects. Some users consider using tretinoin to mitigate negative effects.