Bernard O'Shea: Why Riboflavin is the secret agent of vitamins 

Bernard O'Shea, comedian, columnist and riboflavin aficionado.

I thought I was taking B12 but accidentally popped Riboflavin for three months — now I’ve got stronger nails, fewer headaches, and a weird respect for cereal boxes.

Have you ever found yourself so deep into a routine that autopilot mode takes over? That was me with my vitamins. I buy Vitamin B12 religiously every month — except, as it turns out, I’ve been popping Vitamin B2 (Riboflavin) for the past three months. Yes, I’ve unknowingly been conducting a one-man nutritional experiment.

The vitamin aisle is a dangerous place for anyone prone to indecision. It’s a fluorescent-lit labyrinth of tiny bottles, all screaming for your attention. “Boosts energy!” “Immune support!” “Turns back time!” (Okay, maybe not that last one, but you get the idea.) I’m usually a quick in-and-out shopper, but the vitamin section turns me into a deer in headlights. I must have stared at the B vitamins alone for a solid five minutes, mesmerised by how many ways you can bottle the alphabet. When I grabbed my monthly B12, I was just trying to escape the sensory overload. Little did I know I’d accidentally set myself up for a Riboflavin adventure.

These days, even laxatives have beautiful boxes and authoritative names. You could easily mistake them for something trendy and wholesome. ‘Gut Harmony’ or ‘Flow Natural’ sound more like meditation apps than products that might have you sprinting to the nearest bathroom. I can imagine a scenario where you think you’ve bought a supplement to ‘detoxify your aura,’ only to realise — too late — it was meant to detoxify something else entirely.

My discovery wasn’t dramatic. There was no eureka moment — just me squinting at the label like an old man who’d just realised he was wearing the wrong glasses. The sinking feeling hit: I’d been biologically winging it. I half-expected to find a webbed toe or discover a sudden craving for obscure leafy greens. Instead, I did what any responsible adult would do: I Googled it. It turns out that Riboflavin is quite the overachiever of the vitamin world, which was a relief. Not once did my search results include “may cause spontaneous combustion.”

Before phones and tablets hijacked breakfast, we had the humble cereal box. I’d sit at the kitchen table, spooning sugar-laden puffs of air into my mouth while devouring every inch of the packaging. It was morning entertainment at its finest. And yes, Riboflavin was right on the ingredient list, sandwiched between niacin and iron.

Back then, I thought Riboflavin was just a fancy word for ‘something healthy.’ Little did I know that my childhood habit of reading cereal boxes was essentially Nutrition 101. The cryptic vitamin names weren’t just filler — they were like secret agents, keeping our bodies running smoothly while we focused on the all-important task of avoiding the school bus.

Riboflavin didn’t always grace the side of cereal boxes. It was introduced in the mid-20th century as part of a broader initiative to fortify foods and combat nutritional deficiencies. Many people struggled with poor diets and a lack of essential vitamins during the post-Second World War era. The solution? Slip those nutrients into staple foods. Corn flakes, the reliable beige warrior of the breakfast table, became one of the primary vehicles for delivering Riboflavin to the masses. The idea was simple: ensure everyone gets some of what they need, even if breakfast is more sugar than substance.

One of the standout benefits of Riboflavin is its role in energy production. It’s like the quiet roadie at a concert —working backstage to ensure the show runs smoothly. Riboflavin helps convert carbohydrates, fats, and proteins into energy, which might explain why I had a bit more pep in my step. I wouldn’t say I felt like an Olympic athlete, but I was noticeably less likely to grumble while putting out the bins.

Another surprising advantage is how Riboflavin supports eye health. It helps reduce eye strain and sensitivity to light. While I won’t claim it gave me laser vision, I did notice less squinting while reading my phone.

And when you keep your screen brightness on the ‘battery-saving’ dimmest setting like I do, that’s nothing short of miraculous.

But the most significant, weirdest, and most unexpected benefit of all? Stronger nails. I know that might not sound like a life-changer, but I play the guitar, and my nails are like little plectrums. I’ve always struggled with weak, brittle nails that chip at the worst times — like when I’m halfway through impressing someone with my rendition of Wonderwall. Suddenly, I noticed they weren’t breaking as often. It was as if Riboflavin had gone full Bob the Builder on my nails, giving them a strength boost I didn’t even know I needed.

Beyond the beauty benefits, Riboflavin is crucial for producing healthy red blood cells. These are the little guys that keep your circulation running smoothly. I couldn’t see this effect, but I felt less sluggish. Maybe my red blood cells high-fived each other for finally getting their support.

Lastly, Riboflavin has a hidden superpower: migraine prevention. Studies suggest that it can help reduce the frequency of migraines, and since I’m no stranger to headaches, this benefit felt particularly relevant. I did have fewer headaches over those three months, and while I can’t be 100% sure it was the Riboflavin, I’m more than happy to give it the credit.

Sometimes, the best discoveries are accidental. While I’ve returned to my beloved B12, I’m not ruling out Riboflavin entirely. It turns out my childhood habit of reading cereal boxes wasn’t just a way to pass the time — it was preparing me for a future where I’d unwittingly perform my own vitamin experiment.