The four supplements worth your money, and the dozen that aren't

The short version: creatine monohydrate, caffeine, protein powder, and vitamin D if you're low. That's the list. Everything else in the supplement aisle is either unproven, proven not to work, or works so slightly that you'd never notice it against the noise of a normal week with a job and kids in it.

That's not a cynical take. It's the boring consensus among people who read the literature for a living, and it's been stable for years while the marketing has cycled through a dozen new miracle powders.

If you've got a shelf of tubs and you're wondering which ones to keep, keep four.

Creatine monohydrate

The most studied performance supplement there's, and one of the cheapest things on the shelf. It helps your muscles regenerate energy during short, hard efforts. In practice that looks like one or two extra reps on a set, slightly better recovery between sets, and over months, a bit more muscle than you'd otherwise have built.

It's not dramatic. It's real.

Buy plain creatine monohydrate powder. Not "HCL", not "buffered", not a blend with fifteen other ingredients at doses too small to matter. Monohydrate is the form nearly all the research used, and it's the cheapest, which tells you something about how the industry prices novelty.

Standard label guidance is three to five grams a day, every day, taken whenever you like. Timing doesn't matter much. Consistency does — it works by saturating your muscles over weeks, not by giving you a hit before a session.

The loading phase you've read about isn't necessary. It just gets you there faster.

Two honest notes. Some people hold a little extra water in the muscle early on, which shows up on the scale and means nothing about fat. And if you've got kidney issues or you're on medication, ask your doctor or pharmacist before starting — that's a conversation with a professional, not with an article.

Caffeine

You already take it. You might as well take it on purpose.

Caffeine genuinely improves endurance, reduces how hard effort feels, and sharpens focus. It's one of the few legal substances that reliably makes you better at physical work on the day you take it. Coffee counts. So do tablets, which have the advantage of a known dose.

The catch is tolerance and sleep. If you drink coffee all day, the pre-workout dose isn't doing much beyond topping you back up to normal. And caffeine hangs around in your system far longer than the alert feeling lasts. An afternoon cup can still be in your bloodstream at bedtime, cutting into the deep sleep that's doing most of your actual recovery.

If you're a parent training on limited sleep, that trade is worse than it looks. You borrow energy for a 6 p.m. session and pay it back with a worse night, which makes tomorrow harder.

Practical approach: caffeine before noon most days, before hard sessions specifically, and nothing after mid-afternoon. If you're pregnant, on medication, or your heart does something you don't like, that's a doctor question.

Protein powder

This one's a technicality. Protein powder isn't a supplement in the way the others are — it's food, sold in a tub, with the water removed.

But it solves a real problem. Most people trying to build or keep muscle while working full time are short on protein, and they're short because cooking protein takes time they don't have at 7 a.m. A scoop in water is thirty seconds.

Whey, casein, soy, pea — they all work. Whey is the most convenient and mixes best. If dairy doesn't sit well with you, a plant blend is fine.

Don't overthink the brand. Do look for third-party testing. The supplement industry is lightly regulated, and independent certification programs like NSF Certified for Sport and Informed Sport exist specifically because contamination and mislabelling happen. If you're a serviceman, a competitive athlete, or just someone who'd rather not gamble, buy tested.

And if you're already hitting your protein with chicken, eggs, yoghurt and mince, you don't need the tub at all.

Vitamin D, conditionally

This is the one with an "if" attached.

If you live somewhere with real winters, work indoors, and leave the house before sunrise and after sunset for four months of the year, there's a reasonable chance you're low. Low vitamin D is associated with worse bone health and worse muscle function.

The important part: supplementing fixes a deficiency. It doesn't turn a normal level into a superpower. Topping up when you're already fine does nothing measurable.

The right move isn't to guess. It's a blood test at your next physical, and a conversation with your doctor about whether to supplement and at what dose. Vitamin D is fat-soluble, which means it accumulates, which means more is genuinely not better.

The dozen that aren't earning their place

• BCAAs. Redundant if you're eating enough total protein, which you're if you're using the tub above.
• Glutamine. Popular in the nineties. Never delivered for healthy, training people.
• Testosterone boosters. Tribulus, fenugreek, the rest. If they moved hormones meaningfully they'd be regulated drugs.
• Fat burners. Usually caffeine plus stimulants plus a proprietary blend, priced at ten times what caffeine costs.
• Proprietary-blend pre-workouts. If the label won't tell you the dose of each ingredient, assume the doses are too small to matter. That's why they hide them.
• Mass gainers. Sugar and oil with a scoop of protein. Cheaper to eat.
• Detox and cleanse products. You have a liver and two kidneys.
• Greens powders. Not harmful. Not vegetables either.
• Nitric oxide and arginine pills. The pump isn't the adaptation.
• ZMA. Zinc and magnesium help if you're deficient. Most people aren't.
• HMB. Some signal in people who are untrained or losing muscle. Almost nothing in trained people who are eating properly.
• Collagen for joints. Genuinely unsettled. Might do something modest for tendon tissue. Don't build a plan around a maybe.
• Apple cider vinegar capsules. No.

How to read a label without getting talked into anything

Turn the tub around. Ignore the front entirely — the front is advertising.

Look for the dose of each active ingredient, listed individually. Compare it to what the research used. If the tub has twenty-two ingredients, the maths doesn't work; there isn't room for effective doses of twenty-two things.

Then check for a third-party testing mark. Then check the price per serving, not per tub.

If a product promises something specific and dramatic — pounds of muscle in weeks, a hormone response, fat loss without effort — the promise is the product. The powder's incidental.

What actually moves the needle

The four things above are worth maybe a few percent between them. Which is fine. A few percent, compounded over years, is real.

But they're a few percent of something. If the something isn't there, you're optimising nothing.

Sleep is the biggest recovery lever you have, and it's free, and it's the first thing that goes when you have young children. Protein at each meal beats any powder. Walking most days beats any fat burner ever sold. Showing up three times a week for a decade beats the perfect program you abandon in March.

The supplement industry exists because those four things are hard and buying a tub is easy.

Spend the money on a slightly earlier bedtime instead. It doesn't come in a tub, and it'll do more than everything on the shelf combined.