Backed by 26 clinical trials
Hibiscus is one of the most studied drinks you can steep: 26 randomised trials, 1,797 adults, one flower. The adults who drank it daily finished with lower systolic readings than the ones on placebo.
The science
The cup with the research behind it
Most things in the tea aisle have never been near a clinical trial. Hibiscus has been through more of them than anything else you can steep, and it still tastes like a treat.
26clinical trials
1,797adults studied
50%of the antioxidant power is the colour
0 mgcaffeine
The red is the active part
That deep ruby is anthocyanin, the same pigment family as blackcurrants and elderberries. In lab tests it carried about half of the flower's antioxidant power. Pale hibiscus has already lost it.
Results build with the habit
The clearest results came from the people who kept going for more than four weeks. One cup, most evenings, is the whole method. A pack is thirty of them.
What to look for
Not all hibiscus is created equal
Colour
The colour tells you before you taste it
Pale hibiscus was dried too fast or sat too long. Whole calyces brew deep ruby and hold the tartness, and the colour comes up in about a minute.
Two cups, same three minutes. The only difference is what went into the bag.
Grade
Whole calyces, not dust
Most of what is on the shelf is dust and fannings: the broken leaf and stalk left over once the good calyces have been sold. Fannings brew fast and taste thin.
Whole pieces let the water move through them, so you get colour and tartness instead of a flat red drink. You can see the difference through the bag before you taste it.
In the pack
What is actually in the bag
One ingredient
Whole dried calyces, cut for a 3 g bag
Same flower either way. The difference is whether you get the calyx or the dust, and we buy the calyx.
Nothing else is added, so there is nothing else to read on the back of the pack.
- 30 sealed bags to a pack, a month at a cup a day
- 3 g of whole calyces in every bag
- One ingredient on the panel and nothing to look up
- Tart and clean, closer to cranberry than to a herbal tea
After six in the evening
The evening drink problem
After six in the evening, coffee is out and water is boring. Most people end up on something sweet they did not really want.
0 mg
caffeine
Hibiscus is a flower infusion, not a tea leaf. There was never any caffeine in it to take out, so a cup at ten at night costs you nothing.
30
tea bags
One bag a night is a month of evenings. Thirty sealed bags to a pack, 3 g of whole calyces in each one.
So most evenings end with something sweet you did not really want. There is a third option.
An old habit
Hibiscus has been an everyday drink for a very long time
Long before anyone put it in a box, hibiscus was the drink people made at home. Served hot in the cool season, iced in the heat, often with ginger, cloves and a squeeze of lime.
It is a flower infusion, not a tea leaf, which is why there is no caffeine in it and why it can be the last thing you drink at night.
Whole calyces, not the dust at the supermarket.
What is in every cup
One ingredient. Nothing else.
Most supplement routines mean five different bottles, a dosing schedule, and ingredients you can barely pronounce. TERO is whole hibiscus calyces, 3 g to a bag, 30 bags to a pack.
Anthocyanins
The pigment. It is why the cup is that deep ruby colour and why it stains a white mug. The same family of pigment that makes blackcurrants and red cabbage the colour they are.
Fruit acids
The tartness. Hibiscus acid and citric acid are what give the cup its bright, clean finish, closer to cranberry than to a herbal tea.
Whole calyces
3 g of whole dried calyces in every sealed bag, cut but never ground. Dust and fannings brew fast and taste thin. These take three minutes.
No caffeine at all
Hibiscus is a flower infusion, not a tea leaf, so caffeine was never in it. Drink it at nine at night and it will not keep you up.
Zero sugar, zero calories
Nothing in the bag but the flower. 0 calories, 0 g carbohydrate and 0 g sugar per cup. Sweeten it yourself if you want to, or do not.
One ingredient on the panel
No fillers, no additives and no proprietary blend hiding behind a marketing label. The back of the pack takes a second to read.
Zero caffeine. Zero sugar. Zero calories. Just flowers.
What customers are saying about this product
Average 4.6 out of 5 · 11,000+ five-star ratings
“Everyone in the household enjoys this tea. Got a great aroma, taste, and it seems to be a great value for the money.”
“This healthy hibiscus tea is magenta colored and tastes great with a bit of honey. I have a cup every evening. It’s good for your health!”
“Lovely hued tea that’s slightly tart. I like the flavor and glad it’s not sweet. Have only had it warm but look forward to having it iced.”
“A great substitute for green tea. This is a pink tea with a mild flowery-citrusy taste. I love it.”
“So far, it's our family favorite! We cold brew for iced tea and it's flavor intensity is perfect for our range of preferences.”
“This hibiscus tea is delicious. The aroma is amazing and it has a rich, fruity taste. The color is beautiful to look at! I am sure there are many ways one could prepare it, such as with a slice of orange, or other fruits.”
“This is a great product at a great price. Terrific tea, plentiful quantity, solid pricing (much better than popular brands in grocery chains) and delivered to your door. I am a repeat buyer.”
“These make a great iced tea! I usually make one pot of water to a boil, use around 6 tea bags and soak until cool. Add my sweeteners and Voila, my go to for Tea. Ive only used this brand specifically too and so far its my only choice”
“This brew is delicious by itself, but also when brewed together with regular iced tea. I drink iced tea all day every day. The Hibiscus tea has a bold flavor for an herbal that I find very satisfying.”
“This hibiscus tea is so amazingly delicious. It’s taste is not overpowering like some others. I like to have mine cold mid day with just sugar or honey and if on a diet use Equal or sugar substitute. I add 6-8 oz of boiling water to a tall tumbler with choice of sweater and the tea bag and let it cool down afterwards I add ice cubes and enjoy. Nice bold color. Love this brand and their lovely packaging.”
“Good product, well priced, fast delivery.”
“A refreshing ice tea for any time of day.”
“Delicious no sugar or lemon or milk needed”
“so refreshing as an iced tea on a hot day!”
“Love Hibiscus 🌺! Love this tea !! Tangy flavour!”
“Fabulous flavour, really good quality ingredients”
“Excellent quality, strong flavor. Nice and crisp.”
“Nice and it’s supposed to be good for kidney health”
“Satisfied with the quality and taste of the product.”
“This is a wonderful tea, rich in flavor, not bitter.”
“I enjoy the tartness but yet refreshing and mellow flavor.”
“delicious flavor and for me it doesn’t even need to be sweetened”
“This tea tastes good and helps keep my husband's blood pressure down.”
“Great tea I like that it can help with hypertension. I love the taste”
“Refreshing, bold flavor and a bright, beautiful color. I love the taste.”
“a bit tangy, very tasty. Add a bit of honey for a perfect cup hot or cold.”
“This tea is natural, tastes great and helps lower blood pressure naturally!”
“Delicious! I love the flavor and I know I’m doing something good for my body!!”
“Happy with the purchase and value. The tea bags are well made and would buy again.”
“Probably my top iced tea for the Summer - a little tart and very bright. Delicious.”
“Loves it, if you like a tart flavor this is excellent. Its not to tart, its just right.”
“I am happy with my purchase love the flavour nice and sweet and will get some more again.”
“This tea tastes so amazing and I’m not a hot tea drinker. Helps me sleep better at night.”
“Taste is good. Ingredient is 100% hibiscus dried flower and nothing else. Very nice product”
“The Hibiscus ice tea delivered a flavor explosion with its tart, tangy taste, which I love !”
“Delicious! I gave up all caffeine and this makes a delicious ice tea served with a splash of lemonade.”
“Love the flavor of ice tea this tea makes, tart and fresh, no sugar. Not too crazy about it as hot tea.”
“Best tasting tea out there………no honey or sugar needed…….pleasing aroma, flavor and color. My go to tea.”
“I drink this hibiscus daily. It's not too tart and has a nice crimson color. It's the best I've tried so far.”
“This was the most amazing and flavorful hibiscus tea I have ever had! It was so fresh and vibrant. Delicious!”
“Very fruity, slightly sour and ver refreshing. Needs a tiny bit of sweetnerto knock the edge off. Will be getting more.”
“This hibiscus iced tea is wonderful. First time trying it and will definitely order more. I appreciate that it is not too tart.”
“Really nice strong flavour compared to some on the market. A lovely deep beetroot colour comes from these bags. I will buy again”
“Seems to work very well. Hard to believe that the tiny tea bags with just a few Hibiscus in them are so potent even in a large cup.”
“Better priced than a lot of others and it tastes as good in my opinion. I like that they're not individually packaged as I'm usually making a big pitcher”
“I enjoy the tartness of the hibiscus tea and enjoy it without sweetener and love the the health benefits from drinking this tea. So refreshing on a hot day!”
“If you like an interesting tea and somewhat floral flavor, beautiful color then you might like . Hot or cold w a glass full of ice , fresh cut fruits inside; delicious”
“This tea is the best smelling the best tasting. No aftertaste. Tryed a lot of Hicks tea. This is far more the best that I have ever bought. You won't be disappointed.”
“Very tart but full of flavor.. Love it at night with a few shortbread cookies.. It seems to calm my bladder spasms down..Get my blood work done next month hoping for good kidney functions..”
“Absolutely delicious tea! Tastes and smells really good. Would purchase again for myself and others. It definitely helps you to feel comforted if you aren’t feeling well. Digests well too! Love it!”
Side by side
How it compares to everything else in the evening
No brand names and no invented numbers. Just what is generally true of each kind of drink, next to what is in a TERO bag.
| What you are comparing | TERO | Coffee | Soda and juice | Sweetened herbal blends | Supplement capsules |
|---|---|---|---|---|---|
| Caffeine | Yes. None | No. Yes | No. Often | Yes. Usually none | Yes. None |
| Sugar | Yes. None | Yes. None | No. Yes | No. Often added | Yes. None |
| Calories per cup | Yes. Zero | Yes. Near zero | No. Plenty | No. It depends | Not applicable. Not a drink |
| Ingredients on the panel | Yes. One | Yes. One | No. A list | No. A list | No. Several |
| Fits the evening | Yes. Yes | No. No | No. Not really | Yes. Yes | Not applicable. Not a drink |
| Tastes good enough to keep drinking | Yes. Yes | Yes. Yes | Yes. Yes | Yes. Yes | No. Nothing to taste |
| Whole flower calyces | Yes. Yes | Not applicable. Not applicable | Not applicable. Not applicable | No. Rarely | Not applicable. Not applicable |
Swipe the table sideways to see the rest.
General facts about each kind of drink, not a claim about any particular brand. TERO is a herbal tea, a food and not a medicine.
Ninety day guarantee
Try it for ninety days, risk free
Drink it daily for ninety days. If you are not glad you bought it, email us, send the pack back, and we refund you in full.
- 30 tea bags
- Zero calories
- Studied in 26 trials
- Zero sugar
- Caffeine free
- One ingredient only
Free tracked delivery to your door, anywhere in Iceland.
What to expect
What the first few months actually look like
Honestly, and without pretending anything happens overnight. One cup, most evenings, is the whole plan.
Week one
You find out whether you like it, which is the only thing week one decides. Deep ruby, properly tart, no sugar, and most people land on one cup after dinner.
Weeks two to six
Where the research sits. In pooled trials, adults drinking hibiscus daily showed lower systolic readings than placebo, and the effect showed up over weeks rather than days. That is research on the plant, not a promise about you.
Month three onward
The pack is simply part of the evening, the jug in the fridge is normal, and the ninety day guarantee has run out because you never needed it.
How to make it
Three minutes, one bag
01Add
Place 1 tea bag in your cup or pitcher.
02Steep
Pour water at about 90 degrees C over the bag and leave it 3 to 5 minutes. Longer means deeper and more tart.
03Enjoy hot or iced
Drink hot for a warming cup. Pour over ice for a refreshing cold drink. Add cinnamon, orange slices, mint, or a touch of honey to make it your own.
Try TERO today
One ingredient. Thirty cups.
Nothing to lose.
- Up to 70% off when you choose three or five packs
- Ninety day money back guarantee, whichever pack you pick
- Free tracked delivery to your door, anywhere in Iceland
- Caffeine free, zero sugar, zero calories
Frequently asked questions
Questions, answered properly
What is TERO?
TERO is hibiscus tea in bags: dried hibiscus and roselle calyces, the deep red part of the flower, and nothing else. One ingredient. It brews a ruby red cup that is tart and clean, closer to cranberry than to a herbal tea.
Does it have caffeine?
No. Hibiscus is naturally caffeine free, so TERO fits the evening as easily as the morning. Nothing to keep you up at 2am.
What does it taste like?
Tart, bright and clean, with a natural fruit sweetness underneath. It is not bitter and it does not taste medicinal. Lovely hot, and just as good poured over ice. Add a slice of orange, a little honey or a cinnamon stick if you like.
How do I make it?
One bag in a cup of hot water, around 90°C, for 3 to 5 minutes. Take the bag out and drink it hot, or let it cool and pour it over ice. Do not stew it for longer, that is what makes hibiscus bitter.
How many cups are in a pack?
Thirty bags, so a month at a cup a day. Two packs is two months, three is three, and the price per pack drops each time you add one. The ninety day guarantee covers whichever you pick.
Is it sugar free?
Yes. Zero sugar and zero calories per cup, because there is nothing in the bag but the flower. Sweeten it yourself if you want to, or do not.
What are the results from the clinical trials?
Hibiscus is one of the better studied herbal teas. Pooling 26 randomised trials covering 1,797 adults, daily hibiscus lowered systolic readings by around 7 mmHg against placebo, and the effect showed up over weeks rather than days. Cholesterol moved only slightly. Every one of those trials was run on the hibiscus plant, not on TERO, so treat it as good reason to drink the stuff and not as a promise about you. TERO is a tea, not a medicine.
Is it safe to drink every day?
Hibiscus is a food that people have been drinking for centuries. If you take prescription medication, or you are pregnant or breastfeeding, have a quick word with your doctor or pharmacist before adding any herbal tea to your routine.
How long does delivery take?
Enjoy free priority tracked shipping on every order. Your order is prepared within 1 to 2 business days of being placed, and it reaches you in 12 to 25 days. We ship direct from our production partner rather than paying for local warehousing, and that is exactly what keeps the price where it is. Tracking reaches you by email the moment it moves.
Will I be charged customs or VAT?
Orders arriving in Iceland may attract Icelandic VAT and a postal handling fee, set by the Icelandic authorities rather than by us. We declare every parcel honestly at its real value, which is the only way that ends well for you.
How can I pay?
Credit and debit cards, plus Apple Pay and Google Pay. Apple Pay only appears in Safari and on iPhone, so if you cannot see it, that is why.
Is this a subscription?
No. You pay once, for the packs you choose, and nothing else is ever charged to your card. There is no plan to cancel and no repeat order to forget about.
What if I do not like it?
Drink it daily for ninety days. If you are not glad you bought it, email us, send the pack back, and we refund you in full. That covers the taste as much as anything else.
Fully tracked, door to door. Ninety day guarantee.
TERO is a herbal tea, a food and not a medicine. It is not intended to diagnose, treat, cure or prevent any disease. If you take prescription medication, or you are pregnant or breastfeeding, ask your doctor or pharmacist before adding a herbal tea to your routine.