Vitamin E
TL;DR
something.
Fat soluble so take with food containing fat.
Avoid taking vitamins, minerals (such as calcium) and other supplements for 30-60 minutes after consuming coffee - it contains compounds (polyphenols) that limit the absorption of many micronutrients.
Food Sources
Forms/Types
The natural form of vitamin e: d-alpha-tocopherol is almost twice as potent as the synthetic form: dl-alpha-tocopherol. Other synthetic forms exists but their potency is unknown.
Quality
As with all supplements - buyer beware. It's quite common for supplements to be contaminated with a variety of impurities, often in the form of heavy metals, and/or contain far more or less of the ingredients stated on the label. There's no simple rule of thumb to avoid this, such as avoiding cheap or imported products; expensive or well-known brands produced in-country may be just as bad. Ideally you should take some time to find products (if you can) that;
- have been laboratory tested on behalf of the manufacturer by a reputable body or company that operates in your country or region (here's an example of a Peak Supps creatine supplement available on Amazon in the UK which has been tested by Eurofins: Creatine Monohydrate Powder 1Kg | Pure Micronised | Packaging May Vary - see pictures 3 & 4)
- have been laboratory tested by an independent testing company that ranks product purity and ingredient amount accuracy on behalf of consumers (usually funded by affiliate sales of those products). An example of this is Labdoor.
Dosage - How Much?
Deficiency - Too Little
Toxicity - Too Much
Side Effects
When to Avoid Use - Interactions/Contraindications
When taking blood thinners, may increase their affect