Thanks, Martin, for your comments. Yes, MG supplementation has shown benefits in some disease scenario. The aim of this recipe, though, is to help users get their Mg from natural sources.

A 2020 umbrella review (https://doi.org/10.1007/s00394-019-01905-w) illustrated that outcomes for Mg supplementation are equivocal. Yes, there are RCTs that indicate a reduced frequency of migraine attacks following Mg supplementation, but the effects aren't that strong (at least not in my eyes). Other observational studies show an inverse correlation between Mg intake (not necessarily thought supplements) and diabetes risk. Though I'd be careful to read a causal interpretation into this association.

Diarrhea is a possible side effect of overdosing on Mg+ supplements, but you'd need a lot (ballpark 5 grams).

The biotin issue: yes, biotin deficiency is rare, but a real possibility for patients who are on long-term parenteral (bioti-void) nutrition. Crohn's patients may also be at risk. The case of the raw-egg associated biotin deficiency is an interesting and fortunately extremely rare one. Yes, the protein avidin (a so-.called antinutrient) is present in birds' eggs and binds biotin with high affinity. But avidin makes up only less thn half a percent of egg proteins. It's rather stable, though, and requires several minutes heating >80 degrees centigrade to deactivate to some appreciable extent. So, it's still active in the typical breakfast egg. Given the latter's popularity, we would have noticed by now if it was a threat to biotin sufficiency.