(Damn, I typed this up before I read your whole reply. Looks like you and I have similar thinking.)
Oh boy now I'm into illegal smuggling of drugs for my chams. I wonder if the regulations for selling it is why they don't sell it in the US, because they are being shady. That could be circumstantial, though.
Anyhow, I have a list of the ingredients for the Earth Pro A. I don't have the calcium pro magnesium handy so I cannot say whether or not it has added ingredients or guaranteed analysis as the Earth Pro does. Let's just assume its calcium and magnesium for now. I was typing this up at the office when I first got it. I was trying to research the ingredients to better understand them.
Earth Pro A :
Calcium Carbonate
Mineral Clay
Vegetable Protein
Carrot Powder
Algal Carotenoid
Vitamin B Premix
Bee Pollen
Added: vitamin b1 10mg/kg, vitamin b2 16mg/kg, vitamin b6 20mg/kg, vitamin b12 50mcg/kg, vitamin k 6mg/kg, nicotinic 80mg/kg, pantothenic 40mg/kg, folic acid 5mg/kg, biotin 1000mcg/kg
Calcium Carbonate: we know what this is
Mineral Clay: Apparently there's
iron,
magnesium,
alkali metals (lithium, sodium, potassium, rubidium, caesium, francium),
Alkaline earths (beryllium, magnesium, calcium, strontium, barium, radium) and
other cations in this ingredient. Not sure if it's all of that or not.
"Clay minerals are hydrous aluminium phyllosilicates, sometimes with variable amounts of iron, magnesium, alkali metals, alkaline earths, and other cations found on or near some planetary surfaces."
Source:
https://en.wikipedia.org/wiki/Clay_mineral
Vegetable Protein: I was curious as to what type of vegetable protein they use. I feel like that could determine what vitamins are in this.
Carrot Powder: Typically vitamin A, Biotin, Vitamin K1, Potassium, Vitamin B6 are what carrots provide. Not sure if the powder has the same or if it's dummed down due to the process of drying it and turning it into a powder
Source:
https://www.healthline.com/nutrition/foods/carrots#vitamins-and-minerals
Algal Carotenoid: Reading about this I was wondering what type of algae they use. Apparently different types of algae have different carotenoids. Maybe I'm reading it wrong.
Source:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3131562/
Vitamin B Premix: What sources are they using for the vitamin b premix? Essentially what b vitamins are in this mix?
Bee Pollen: "Pollen is quite a significant source of vitamin both fat-soluble 0,1%, such as provitamin A and vitamins E and D, and water-soluble 0,6%, such as B1, B2, B6, and C, and acids: pantothenic, nicotinic and folic, biotin, rutin, and inositol. Their total amount is equal to 0,7% in the whole product. "
Source:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4377380/
I don't know if I'm looking to deep into it. I haven't quite taken the time to research each ingredient of the supplements I've used prevsiously or how their ingredients contrast with Arcadia's.
I previously used
Repcal Herptivite Multi Vitamin which has the following ingredients:
Glutamic Acid, Aspartic Acide, Leucine, Valine, Serine, Lysine, Alanine, Phenylalanine, Arginine, Isoleucine, Threonine, Tyrosine, Methionine, Proline, Glycine, Cysteine, Histidine, Suncured Alfalfa, Dried Kelp, Calcium Carbonate, Dicalcium Phosphate, Ascorbic Acid, Potassium Chloride, Riboflavin Supplement, Thiamine Mononitrate, Pyridoxide Hydrochloride, Manganous Oxide, Sulfure, ZInc Oxide, Vitamin B12 Supplement, Copper Oxide, d-Calcium Pantothenate, Magnesium Oxide, Menadione Sodium Bisulfite Complex (source of Vitamin K activity), Biotin, Folic Acid.
Source:
https://www.joshsfrogs.com/herptivite-multivitamin.html
Also,
Repcal Calcium plus d3:
Calcium, minimum 35%; Calcium, maximum 40%; Vitamin D3, minimum 400,000 IU/Kg
Source:
https://www.joshsfrogs.com/rep-cal-ultrafine-calcium-with-vitamin-d3.html
Lugarti Calcium with no d3:
Pure calcium carbonate
Guaranteed analysis: calcium (min) 38% (max) 43%, Vitamin D (min) 0.0 IU/lb
Source: The bottle label I have