Scroll the reviews on any supplement and you will find the same pattern. One person says it tastes great. The next says it is undrinkable. They bought the identical product, and both of them are telling the truth.
By Parachew Team, McAb Nutra
This is not review manipulation and it is not people being dramatic. It is one of the best-documented facts in sensory science: bitter perception varies enormously between individuals, and the variation is genetic. Once you understand the three groups people fall into, contradictory taste reviews stop being confusing and start being useful information.
The Three Groups
The most studied bitter taste gene is TAS2R38. It is broadly tuned to a class of bitter compounds called thioureas, and the variants people carry sort them into three groups.
Nontasters make up roughly 30% of the population. Given the standard test compound, they taste essentially nothing. Paper.
Medium tasters are the largest group. They register the compound as clearly bitter, but at a manageable intensity.
Supertasters experience the same substance as intensely, sometimes overwhelmingly bitter. Their reaction to a solution that a nontaster describes as water is genuine disgust.
That is a three-way split, on one gene, on one class of compounds. Now consider that humans have about 25 bitter receptors in total, each with its own variation, and you start to see why "does this taste good" is not a question with a single answer.
It Is Not Just One Gene, and Not Just One Compound
The supertaster framework is useful shorthand but it undersells how varied this actually is.
Human bitter taste receptor genes carry substantial diversity in their coding sequence, and different receptors handle different compounds. When researchers screened all 25 human bitter receptors against 104 bitter chemicals, they found receptors ranging from narrowly tuned, responding to a handful of molecules, to extremely broad. Three receptors between them covered about half the compounds tested.
The practical result is that bitter sensitivity is not one dial. Somebody can be highly sensitive to the bitterness in coffee and barely notice the bitterness in tonic water, because those run through partly different receptors with independently varying genes.
The caffeine-specific evidence bears this out. A genome-wide study of 608 people found a variant, rs2708377, on chromosome 12 associated with how bitter people found caffeine, and showed it was statistically distinct from the nearby variant governing quinine. Same neighbourhood of the genome, different traits.
And when researchers tested real drinks rather than lab solutions, a block spanning TAS2R3, TAS2R4 and TAS2R5 explained part of the variation in how bitter people found espresso.
How to Actually Read a Taste Review
Once you accept that reviewers have different hardware, a few practical rules follow.
Ignore single reviews, read the distribution. One person calling something bitter tells you about that person. Twenty people out of a hundred calling it bitter tells you roughly what proportion of buyers land on the sensitive end, which is genuinely useful.
Weight reviewers whose baseline you know. A reviewer who mentions they drink black coffee, eat dark chocolate or like IPAs is telling you they tolerate bitterness well. If that person says something is bitter, take it seriously. If a reviewer says they take three sugars in their tea and found something too bitter, that is much weaker evidence about how you will experience it.
Calibrate on yourself first. You already have a lifetime of data. Black coffee, grapefruit, tonic water, dark chocolate, raw kale, IPAs. If most of those are unpleasant to you, you are probably toward the sensitive end and you should read taste reviews accordingly. If you happily drink all of them, you have a wide tolerance and most products will be fine.
Remember that liking and perceiving are different. Research examining both genetics and environment found that taster status, age and gender often influenced food preference more than genotype alone did. Plenty of supertasters drink black coffee daily. They perceive the bitterness fully and have decided they do not mind.
What This Means for Energy Products Specifically
Methylxanthines, the family that includes caffeine and paraxanthine, are bitter as a category. Any product built on one of them is handing you a bitter alkaloid and asking your particular set of receptors what they make of it.
Which is why we built two flavours that approach it from opposite directions rather than one compromise flavour.
Strawberry Lemonade uses acidity and sweetness together. Sugars and acids are the levers the taste research identifies for reducing perceived bitterness, and this is the flavour built around them. If you read the calibration list above and recognised yourself as sensitive, start here.
Caramel Coffee goes the other way deliberately. It leans into a profile people already accept as pleasantly bitter rather than trying to hide bitterness entirely. If you drink your coffee black, this will suit you and Strawberry Lemonade may read as too sweet.
Getting to the point where either was possible was the hard part. Five or six labs competed for the formulation work, and one of them cracked the bitterness with a special formulation. That is what is in every gummy now, at 200 mg of paraxanthine each. You can read the receptor-level science, with every citation, on our science page.
Frequently Asked Questions
How do I find out if I am a supertaster? Formally it is a PROP or PTC test strip, sold cheaply online. Informally, the calibration list above gets you close: if black coffee, grapefruit, tonic water and raw brassicas are all genuinely unpleasant, you are likely toward the sensitive end.
Does being a nontaster mean I have a bad palate? No. It means one class of bitter compounds does not register strongly for you. It says nothing about your ability to detect sweetness, salt, acidity, aroma or texture, which is most of what flavour actually is.
Does taste sensitivity change with age? Bitter sensitivity does tend to decline over a lifetime, and children are generally more bitter-sensitive than adults, which is a well-documented problem in paediatric medicine. It is part of why foods you hated as a child can become tolerable later.
Do the two Parachew flavours have the same amount of paraxanthine? Yes. Both are 200 mg per gummy, with 25 mcg of vitamin B12 alongside it. The label maximum is 400 mg per day, which is two gummies. The flavours differ, the actives do not.
Which flavour should I try if I genuinely cannot tell? Strawberry Lemonade. It is the more forgiving of the two across a wider range of palates. If it lands as too sweet, Caramel Coffee is the correction.
Calibrate on the Real Thing
You now know more about your own bitter perception than most people ever bother to work out. The remaining question is an easy one to settle.
Try Parachew, pick the flavour that matches where you landed on the calibration list, and find out which group you are in.
