Symptoms taken from the wiki:
Quite a few of those could be made as debuffs in game.Overuse of the supplements increase this sensation, with the test group experiencing increased burning sensations in organs, development of photosensitivity, sunburn, inflammation, dim to intense bioluminescence, Hypervitaminosis D, vomiting, nausea, dehydration, decreased appetite, insomnia, constipation, fatigue, irritability, myasthenia, and metastatic calcification. Other severe cases have reported various forms of cancer, large kidney stones, hypercalcemia, xeroderma, actinic keratosis, polymorphous light eruption, cataracts, macular degeneration, immune suppression, abnormal vascular functionality, solar elastosis, 1st-3rd degree (internal and external) burns, invisibility from the visible spectrum, and [REDACTED].
SCP-3399: Add some extra backstory. Once you touch SCP-3399, you will lose a little bit of blood, but will see images from when D-9341 was Benjamin Oliver _Ker.