Any specific percentage you encounter online is, at best, an extrapolation from rodent data and, at worst, marketing
Bariatric Fusions bariatric multivitamins and supportive supplements are formulated by a team of bariatric practitioners to support nutrient absorption for those who have undergone ASMBS-endorsed procedures, including duodenal switch, SIPS, SADI-S, sleeve gastrectomy, gastric bypass surgery, lap band, and intra-gastric balloon
Amended safety assessment of copper salts as used in cosmetics
The NHS confirms that taking up to 2mg (2000 micrograms) daily is unlikely to cause harm, with no established upper limit in the UK
10.1016/j.plipres.2009.08.004 24 KangM.YooH
10.1038/ncomms6484 7 AmbroseA