A Pre-Purchase Card for When the Last Supplement Didn't Work

When you run a one-person firm, you probably don't buy a van, a saw or a software subscription without comparing options. A supplement that didn't seem to do anything deserves the same care before you spend again or write off the whole category.

"It didn't work" can mean several things. Some of them are about the product, and some are about how it was used. A small card, written down once and kept with your receipts, helps you tell the difference.

How to use the card

Keep it simple. One page, or a note on your phone, with a few headings you fill in before you pay for anything. The point is to make the decision on paper rather than on the strength of a promising label or a late-night advert.

The longer guide on what to check before trying another supplement covers the same ground in more detail. The card below is the short version for your desk or glovebox.

Box 1: What I actually took

Find the old tub, bottle or order confirmation and write down:

• The main ingredient, named precisely.
• The form: capsule, powder, juice or shot.
• The amount you were meant to take, and how often.
• Whether you took it as directed.

Be honest on the last line. A product taken now and then, whenever you remembered, isn't a fair test. If the routine was the weak point, a new product won't fix it. A better routine might.

Box 2: Variety

Labels can be loose with names. Take cherry products. Some use sweet or black cherry rather than Montmorency tart cherry, so two products both called "cherry" may not be like for like.

On your card, write down:

• Does the label name the variety?
• If it only says the general name, have I asked the seller?

The same habit applies to any ingredient. If the front of the pack is vague about what's inside, treat that as a warning sign and look closer before buying.

Box 3: Concentration

Two products can share a main ingredient and still differ a lot in strength. Look for a stated concentration, such as an extract ratio, rather than a general phrase like "high strength".

Write down:

• The concentration stated on the old product, or "none given".
• The concentration stated on the one I'm considering.

If the old label gave no concentration at all, you may not have known what you were getting. That's a fair reason to try something that spells it out.

Box 4: Form

Form changes the practical side, and a product you can't fit into your day won't get taken.

• Juices and shots: Many shop-bought cherry juices contain added sugar and may not be made from Montmorency cherries. Read the ingredients list, not just the front of the bottle.
• Capsules: Easy to keep in a van, toolbox or jacket pocket, with no fridge or measuring. Check whether they're sugar-free and how many you're meant to take.
• Powders: Fine if you'll really mix them, but they need time and a clean mug on site.

Write down which form suits your working day, then choose on that basis. Pick the one you'll stick to on a cold morning, not the one that looks best on the shelf.

Box 5: Before I buy

Add a final line for the decision itself:

• What am I changing this time: variety, concentration, form or routine?
• How will I take it, and when will I review whether to carry on?
• Have I checked it suits me?

That last one matters. If you take medication, have a health condition, are pregnant or are unsure whether a supplement is right for you, ask a pharmacist or your GP before starting. A card can organise your thinking, but it can't replace that advice.

Keep the card

Once filled in, file it with the receipt. If this attempt also disappoints, you'll have a record of what changed and what didn't, instead of a vague memory of a tub that went off in a cupboard.

Sometimes the card will show you that nothing about the new product is meaningfully different from the old one. That's a useful result too. It saves you a purchase, the same way a second quote that matches the first tells you there's nothing to gain from switching.