Positives

• Chromium may be relevant for patients who suspect blood-sugar swings are contributing to shakiness, fatigue, cravings, brain fog, or post-meal crashes; one patient report described improvement in sugar cravings and low-blood-sugar-type symptoms after chromium picolinate (Phoenix Rising).
• It is best framed as metabolic support rather than a direct Long COVID, ME/CFS, Lyme, POTS, or MCAS treatment (NIH).

Negatives

• Evidence for meaningful glucose improvement is mixed, and diabetes-focused references do not show that chromium reliably improves PEM, dysautonomia, mast-cell symptoms, or post-viral fatigue (Merck Manual).
• Rare kidney and liver concerns have been reported at supplement doses, so this is not a risk-free “basic mineral” for complex chronic illness patients (Annals of Internal Medicine).

Hurdles & Side Effects

• Chromium can interact with diabetes medications and may increase hypoglycemia risk in susceptible patients (WebMD).
• It can also interfere with thyroid medication absorption if taken too close together, so timing matters for patients on levothyroxine or similar medication (NIH).