Sports Research Vitamin D3 + K2 Review: Daily Use From a Retired Cafeteria Manager

I spent 26 years running a school cafeteria, which means I have opened more jars than most people will in a lifetime and I have read more labels than I care to admit. I retired in June 2023. That first winter at home I noticed something simple: I was indoors a lot more than I used to be. Cafeteria work had me up and moving under fluorescent lights and out in the parking lot at 5:45 every morning. Retirement had me in a kitchen chair with a second cup of coffee.

So in April 2024 I started taking Sports Research Vitamin D3 + K2, one plantgel with breakfast. That was 31 months ago. I am not a doctor, a nurse, or a dietitian, and nothing in this piece is medical advice. I am a 57-year-old woman in Knoxville, Tennessee, telling you what I noticed, what I did not notice, and what I would want a neighbor to tell me before she spent her own money. If you take prescription medication, show your pharmacist your whole list before you add anything, the way I did.

How I've Used It

One plantgel, once a day, with breakfast at 7:30 in the morning. Never on an empty stomach, because that is how I take everything. It sits on the kitchen counter right beside the coffee maker, in the container it came in. I have never used a pill organizer and I have never lost a bottle. The jar has been in the same spot for two and a half years, which is why I have never missed a stretch of days. Out of sight is out of mind for me.

Before this I took a plain store-brand D3 with no K2 in it. That was the switch. Nothing dramatic pushed me to it. I read the labels side by side in the store, saw that this one pairs D3 with K2, and decided that if I was going to take a vitamin every morning I would rather take the one that pairs them. The old bottle was a big dry tablet in a hundred-count size, and the reason I was open to switching at all was that I had started dreading it. That is not a scientific reason. It is the honest one.

I bought Sports Research myself on Amazon in April 2024. Nobody sent me anything and nobody paid me for this. The first jar arrived on a Tuesday, and I opened it at the counter that same afternoon with my reading glasses on, turning it around twice to find the amounts. I have never run out, and I have never had a jar arrive damaged.

Here is what I want to be honest about up front: I noticed nothing. No surge of energy, no before and after, no morning where I woke up feeling different. I take it because it fills a gap in a normal diet and because the habit is easy enough that I actually keep it. That is a boring review, and I think boring is the truthful kind for a vitamin.

What Is Actually in the Plantgel

The label is the reason I picked this one, so let me walk through what it says rather than what a commercial says. Each softgel delivers 125 mcg (5000 IU) of vegan D3 and 100 mcg of K2 as MK-7. The D3 here is cholecalciferol sourced from lichen, and the K2 comes from fermented chickpeas. The listing also mentions coconut oil, which is why the plantgel has a soft, oily feel in the mouth.

Two things on that label mattered to me as a label reader. First, the K2 is MK-7, and the listing calls that the most bioavailable form of K2, which is the detail I was looking for when I switched off the plain D3. Second, the product is vegan and gluten free. I am not vegan and I do not avoid gluten, but I cooked for hundreds of kids a day for a quarter century and I got in the habit of noticing what is in a thing before I serve it.

The softgel is small and unflavored. I take it with a full glass of water and it goes down without any trouble, which is not a small thing at my age. I have taken tablets that I had to work at. This is not one of them. The jar itself is a jar, dimensions listed as 1.88 by 1.88 by 3.88 inches and 1.44 ounces, small enough to sit on the counter without taking over the counter. I measured it against my coffee canister once, out of curiosity, and it is shorter than the canister by a good two inches. That matters if you are picturing something that needs its own shelf.

I also want to be clear about what the label does not promise. It does not say it will fix anything, and I would be suspicious of a bottle that did. It gives you amounts and sources. The rest is your own arithmetic about whether your diet covers what you need, and that is a question for your doctor, not for me and not for a review.

31 Months In: What Changed and What Didn't

I keep a small notebook where I write down what I take and when, mostly so I can answer questions at appointments without guessing. That notebook is why I can tell you the date I started, April 2024, and why I can tell you I have not missed a stretch. I showed my full list to my pharmacist in January 2025 and was told to keep the magnesium apart from the morning group, which is the only instruction I have been given about any of this.

The notebook has one column for the date and one for whether I took it, and that is all. I started it because I could not remember in February 2025 whether I had refilled in January or December, and I was annoyed at myself. Twenty-five months of ticks in a spiral notebook is not much of a diary. But it is a plain record, and it is a better record than my memory.

What changed: nothing I could point to and call a result. What stayed the same: the habit. That is genuinely the review. The value I get is that the routine is simple enough that I keep it without thinking about it, and the label tells me what is in it in plain terms. There is no story here about a turnaround. I would be making it up if I told you there was, and I am not going to do that.

What I can tell you is the practical stuff, the stuff a neighbor actually asks. It did not upset my stomach, even though I take it with food and always have. It did not change how anything tastes, because there is no flavor to it. It did not interfere with my mornings, because it takes about four seconds. Gene asks me sometimes whether I can tell a difference from any of it, and my answer is always the same: no, and I keep taking them anyway.

I noticed nothing. No surge of energy, no before and after. I take it because it fills a gap in a normal diet and because the habit is easy enough that I actually keep it.

The 30-Count Jar Is the Real Downside

Here is my one genuine complaint, and it has nothing to do with what is inside the plantgel. One a day means a 30-count jar is gone in a month. Thirty-one months in, that is 31 jars, and I have reordered 31 times. The last one I opened was on a Monday morning, which is when I noticed the count was down to four and got on the laptop. If you are the kind of person who forgets to reorder until the bottle is empty, this format will catch you out. I have not run out yet, but that is because I reorder the moment I open the last jar, not because the jar is generous.

I have thought about buying a larger size and I have not, mostly out of habit. But if you are deciding, know that the count is small. That is the tradeoff: small jar, easy to store, but frequent reordering. For me it is a paperwork annoyance, not a reason to stop. For someone who hates managing subscriptions and reorders, it might be the thing that makes them look elsewhere.

How It Fits With the Rest of My Morning

I take five things now, and this one is the second of the morning group. At 7:00 I take a probiotic with water. At 7:30, with breakfast, I take Centrum, this Sports Research D3 + K2, and a fish oil. At 9:00 at night I take magnesium, which lives on my nightstand and is the only one that does. Bottles stay in their original containers. I have never decanted anything into a cute little box.

The reason I mention the routine is that it is the part that actually matters. A supplement you do not take is worth nothing. I have watched people buy a bottle, put it in a cabinet, and find it a year later. Mine is on the counter by the coffee maker because that is where I am at 7:30 in the morning, and that single decision is the reason I have 31 months of consistency instead of a half-empty jar in a drawer.

If you are building a morning group yourself, my advice is to keep it as small as you can honestly maintain. I added things one at a time, months apart, so I could tell whether any of them bothered me. The Centrum came first, in January 2024. This one came in April. The fish oil did not come until February 2025, ten months later. I would not start five new bottles in one week. I would not know what to blame if something went wrong.

Where I Land After Two and a Half Years

I still take it. That is the cleanest summary I can give. I am not going to tell you it changed my life, because it did not, and I would not trust a review that said so about a vitamin. What I will tell you is that the label is legible, the plantgel is easy to swallow, the ingredients are the ones I went looking for, and the habit has held for 31 months without a single missed stretch. The jar size is a genuine annoyance and I have no defense for it.

If you want to see how it stacks up against a common alternative, I wrote a separate piece comparing Sports Research D3 + K2 against Nature Made D3 + K2 by label alone. I have not taken the Nature Made one. I read its label and its listing and put the two side by side, which is all I can honestly claim. And if you are still deciding whether D3 with K2 belongs in a daily routine at all, I laid out my ten reasons in another article. Both are worth five minutes before you buy.

Who This Is For

This is for someone who has already decided they want D3 paired with K2 and wants a label they can read without a magnifying glass. It is for the person who keeps a morning group on the kitchen counter and wants something small enough to swallow without a fight. It suits someone who spends most of the winter indoors, the way I do now that I am retired, and who wants a routine simple enough to actually keep past the first month.

It also suits the label reader. If you are the sort of person who turns the bottle around in the store and reads the small print before you commit, this one rewards that habit. The D3 source is named, the K2 form is named, and the amounts are stated plainly rather than buried.

Who Should Skip It

Skip it if you need a large count per bottle and hate reordering. Thirty days is thirty days, and that is a real inconvenience. Skip it if you are looking for something you can feel working, because I have not felt anything in 31 months and I am not going to pretend otherwise. Skip it if you are already taking a D3 you like and the label already tells you what you want to know.

And skip it, or at least stop and talk to your doctor first, if you take prescription medication or have any condition your doctor is managing. I am not a medical professional. I showed my pharmacist my full list in January 2025 and that is the only reason I know to keep my magnesium at night. Do that. Ask before you add. That advice is worth more than anything else in this review.