Why Do Rugby Vitamin D3 2000 IU Tablets Contain Triglycerides?

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The triglycerides in Rugby Vitamin D3 2000 IU tablets are there to carry the vitamin itself, not to add fat to your diet. Vitamin D3 (cholecalciferol) is an oily, fat-soluble vitamin that can't simply be pressed into a tablet on its own, so it has to be dissolved in a small amount of fat before it can be blended evenly with the powders that make up the tablet.

Medium chain triglycerides, a purified oil usually made from coconut or palm kernel oil, are the industry's usual choice for that job, and that's almost certainly what the word "triglycerides" on your label is referring to.

Vitamin D Supplements & Their Ingredient List

It helps to remember just how little vitamin D is actually in the tablet. A 2000 IU dose is only 50 micrograms, a speck far too small to handle or measure reliably on a production line.

To get around that, manufacturers buy cholecalciferol that has already been dissolved in medium chain triglyceride oil and then, in most cases, sprayed into tiny dry beadlets held together with gelatin, sucrose, and modified starch.

Antioxidants such as dl-alpha tocopherol (a form of vitamin E) and sodium ascorbate are added at the same time, since vitamin D3 breaks down when it's exposed to oxygen, heat, and light. Formulation scientists have explored all sorts of protective carriers for vitamin D3 for exactly this reason, because the vitamin is fragile and needs something to hold and shield it.

Those beadlets are then mixed with the ingredients that make a tablet a tablet. Fillers like dicalcium phosphate or microcrystalline cellulose give it enough bulk to pick up, croscarmellose sodium helps it break apart in your stomach, stearic acid and magnesium stearate keep the powder from sticking to the tablet press, and a thin hypromellose film coating makes it easy to swallow.

That coating itself often uses a little medium chain triglyceride as a softening agent, which is a second reason you may see triglycerides listed. So nearly everything on that label exists to protect, stabilize, and deliver 50 micrograms of vitamin, which is why the inactive ingredients outnumber the active one so dramatically.

What the Triglycerides on the Label Mean for You

The triglycerides in your tablet have nothing to do with the triglycerides your doctor measures in a cholesterol panel, and the amount involved is on the order of a few milligrams, far less fat than you'd get from a single bite of most foods. They contribute essentially no calories and isn't expected to have any effect on your blood triglyceride or cholesterol levels.

If anything, a trace of oil is a natural companion for a fat-soluble vitamin, since vitamin D absorbs best in the presence of dietary fat. That's also why pharmacists commonly suggest taking vitamin D3 with a meal that contains some fat, which is worth doing with this product as well.

Medium chain triglycerides are highly refined, so even people who avoid coconut or palm products rarely have trouble with them, but if you have a true allergy to either, or a religious or dietary reason to care about the source of the gelatin or the oil, the tablet label alone can't settle that for you.

Rugby (part of Major Pharmaceuticals) is the only one who can confirm the exact source of the ingredients in your bottle, and ingredient lists can vary between manufacturers and even between lots, so always go by the label on the bottle you actually have. Our vitamin D page has more background on the vitamin itself if you'd like it.

Final Words

To sum up, the triglycerides in your Rugby Vitamin D3 are simply the oil that carries a fat-soluble vitamin, and the rest of that long list is there to keep a very small dose stable and easy to take.