Drinking milk is good, but you shouldn’t drink skim milk if you live in the United States, because it has retinol supplements.
Consuming more retinol than necessary causes bone problems. For more info:
Retinol Intake and Bone Mineral Density in the Elderly
https://onlinelibrary.wiley.com/doi/10.1359/jbmr.2002.17.8.1349
“Drinking milk is good, but you shouldn’t drink skim milk...because it has retinol supplements.”
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I dilute 4% (full-fat) milk—1:4—with water, and am now accustomed to a weaker-tasting milk.
WRT retinol, is that wise?
Retinol is recommended for skincare products. It probably seeps into the skin.