This is Chat GPT 4o's answer with references below. I have NOT cross checked the math or the assumptions, but what the program has done is how I would figure it out. For forms not listed you could go into pubchem [
pubchem.ncbi.nlm.nih.gov] or other references and figure out the molecular weight of the compound and divide the molecular weight of magnesium by that to find the % magnesium by weight. In all the Chat answers 1.5 grams was assumed to be the weight of the compound in 1/2 tsp. I've not weighed the various compounds to see if this is accurate. I commonly use magnesium hydroxide, magnesium malate and magnesium chloride. The malate and chloride may have about the same density, but the hydroxide is materially less dense so would weigh a lot less in 1/2 tsp. If I'm calculating for myself, I find the % magnesium by weight by doing the math and then weigh the compound on a milligram scale for whatever volume I'm looking at.
Chat GPT 4o:
To estimate the amount of elemental magnesium in different powder forms, we need to know the specific magnesium compound used in each powder form. Here are some common forms of magnesium powder and their typical elemental magnesium content:
1. **Magnesium Citrate**:
- Elemental magnesium content: About 16% by weight.
- 1/2 tsp of magnesium citrate powder (roughly 1.5 grams) would contain approximately 0.24 grams (240 mg) of elemental magnesium.
2. **Magnesium Oxide**:
- Elemental magnesium content: About 60% by weight.
- 1/2 tsp of magnesium oxide powder (roughly 1.5 grams) would contain approximately 0.9 grams (900 mg) of elemental magnesium.
3. **Magnesium Glycinate**:
- Elemental magnesium content: About 14% by weight.
- 1/2 tsp of magnesium glycinate powder (roughly 1.5 grams) would contain approximately 0.21 grams (210 mg) of elemental magnesium.
4. **Magnesium Chloride**:
- Elemental magnesium content: About 12% by weight.
- 1/2 tsp of magnesium chloride powder (roughly 1.5 grams) would contain approximately 0.18 grams (180 mg) of elemental magnesium.
5. **Magnesium Malate**:
- Elemental magnesium content: About 15% by weight.
- 1/2 tsp of magnesium malate powder (roughly 1.5 grams) would contain approximately 0.23 grams (230 mg) of elemental magnesium.
These are rough estimates based on standard forms and may vary slightly depending on the specific brand or formulation of the powder.
Here are the expanded references for each type of magnesium powder and their respective elemental magnesium content:
1. **Magnesium Citrate**:
- Elemental magnesium content: About 16% by weight.
- 1/2 tsp of magnesium citrate powder (roughly 1.5 grams) would contain approximately 0.24 grams (240 mg) of elemental magnesium.
- Reference: [Magnesium Citrate - PubChem](https://pubchem.ncbi.nlm.nih.gov/compound/Magnesium-citrate)
2. **Magnesium Oxide**:
- Elemental magnesium content: About 60% by weight.
- 1/2 tsp of magnesium oxide powder (roughly 1.5 grams) would contain approximately 0.9 grams (900 mg) of elemental magnesium.
- Reference: [Magnesium Oxide - PubChem](https://pubchem.ncbi.nlm.nih.gov/compound/Magnesium-oxide)
3. **Magnesium Glycinate**:
- Elemental magnesium content: About 14% by weight.
- 1/2 tsp of magnesium glycinate powder (roughly 1.5 grams) would contain approximately 0.21 grams (210 mg) of elemental magnesium.
- Reference: [Magnesium Glycinate - PubChem](https://pubchem.ncbi.nlm.nih.gov/compound/Magnesium-glycinate)
4. **Magnesium Chloride**:
- Elemental magnesium content: About 12% by weight.
- 1/2 tsp of magnesium chloride powder (roughly 1.5 grams) would contain approximately 0.18 grams (180 mg) of elemental magnesium.
- Reference: [Magnesium Chloride - PubChem](https://pubchem.ncbi.nlm.nih.gov/compound/Magnesium-chloride)
5. **Magnesium Malate**:
- Elemental magnesium content: About 15% by weight.
- 1/2 tsp of magnesium malate powder (roughly 1.5 grams) would contain approximately 0.23 grams (230 mg) of elemental magnesium.
- Reference: [Magnesium Malate - PubChem](https://pubchem.ncbi.nlm.nih.gov/compound/Magnesium-malate)
You can click the links above to access further details about each compound from PubChem.