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What Is Synthetic Vitamin E Tocopheryl Acetate on a Label?
Synthetic vitamin E tocopheryl acetate is the lab-made vitamin E often written dl-alpha tocopheryl acetate. The Reviralis Complete label prints it at 27 mg, 180% of the Daily Value, against an upper limit of 1,000 mg. High doses may raise bleeding risk, including alongside blood thinners.
Written by the Goreviralis label deskUpdated · 4 min read
What does dl mean in dl-alpha tocopheryl acetate?
The "dl" prefix marks the synthetic form of vitamin E. The "d" form comes from plant sources, and the "dl" mix is made in a lab (NIH ODS, Vitamin E).
| Wording on a label | What it usually means |
|---|---|
| d-alpha tocopheryl acetate | Natural source form, with an acetate added to keep it stable |
| dl-alpha tocopheryl acetate | Synthetic form, with the same stabilizing acetate |
| Tocopherol (no acetate) | The unmodified form, often in oils |
The acetate is a stabilizer that keeps the vitamin from breaking down in the capsule. The Reviralis line reads Vitamin E (as DL-Alpha Tocopheryl Acetate) 27 mg, so it is the synthetic kind. The sales page says "Non-GMO, stimulant-free, and 100% natural". A dl line is a lab-made form, so the word "natural" does not describe it.
How do IU and mg compare for vitamin E?
Newer labels use milligrams, while older ones used IU, and the two do not convert with one number because natural and synthetic forms count differently.
That is why a bottle showing "400 IU" and one showing "27 mg" are hard to compare by eye. The adult RDA is 15 mg a day, so 27 mg is 180% of the Daily Value (NIH ODS, Vitamin E). The label does not print a conversion note, so ask a pharmacist if you want to line up an older bottle.
The same source puts the upper limit at 1,000 mg from supplements, so 27 mg is under 3% of it.
Does vitamin E raise bleeding risk?
High doses may. NIH notes a possible increase in bleeding risk, including when taken with anticoagulant medicine (NIH ODS, Vitamin E).
The warning is about large supplement doses and about people already on a blood thinner such as warfarin. It is not a statement about 27 mg. The Reviralis label still names blood thinners in its caution, and the grape seed and bilberry lines in the blend carry their own bleeding notes. Tell the clinic that manages your blood tests about every supplement, since small shifts matter there.
- Planning surgery? Tell the surgical team about vitamin E products.
- On a blood thinner? Ask before adding any new capsule.
- Seeing unusual bruising or bleeding? Tell a clinician soon.
Reviralis: from $49 a bottle60 capsules a bottle · 2, 3 or 6 bottles · free US shipping on 3 and 6 · 60-day money-back guarantee
See packsWhat should you ask before taking vitamin E with other medicines?
Ask: "I take this blood thinner. Does 27 mg of synthetic vitamin E matter, and when is my next blood test?" Keep taking prescribed medicine, including any antiviral, unless your prescriber says otherwise. No source we read tested Reviralis itself.
The full amounts are on the supplement facts page. The blood thinner questions are laid out on the medicine check page, and the claims about "natural" are answered on the is it legit page. A related post covers supplements and warfarin.
FAQ01
Vitamin E form questions
Is synthetic vitamin E bad for you?
No source we read calls it bad. Synthetic vitamin E is a recognized form, and the RDA is 15 mg a day. The cautions are about large doses and bleeding risk with blood thinners, so the amount and your medicines matter more than the label word synthetic.
Is dl-alpha tocopheryl acetate natural?
No. The dl prefix marks the synthetic form, made in a lab. A product can still say natural elsewhere on its pages, so read the ingredient line itself. The Reviralis line prints DL-Alpha Tocopheryl Acetate, which is synthetic.
What is the upper limit for vitamin E supplements?
For adults, 1,000 mg a day of supplemental alpha-tocopherol. The Reviralis label prints 27 mg for two capsules, which is under 3% of that. High intakes may increase bleeding risk, including with anticoagulants.
Does tocopheryl acetate work the same as plain tocopherol?
The acetate form is a stabilized version that the body converts to the active vitamin. Sources we read treat the forms as vitamin E for counting purposes. Ask a pharmacist if you need to compare labels in IU and milligrams.
Who wrote this02
Written and reviewed by
Pages built from the label, the sales page and linked NIH, CDC, FDA, FTC, Mayo Clinic and peer-reviewed sources.
Last updated . Read our editorial standards and how we check reviews. This website is the information site for a U.S. stocking partner for Reviralis. It is not the manufacturer or the distributor named on the label. We earn money when you buy through our order links.
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