Ingredient page
Green tea extract and guarana caffeine in Olivaro: what the label does not say
Olivaro lists green tea leaf extract and guarana seed extract inside its 200 mg proprietary blend, and the label prints no amount for either and no caffeine amount. Guarana seeds can hold up to 6% caffeine, and FDA's reference level is 400 mg a day for most healthy adults. Six green tea trials found no difference in HbA1c or fasting glucose.
Written by the Olivaro label deskUpdated
On the label
Where are green tea and guarana on the Olivaro label?
Both are rows in the Proprietary Blend: Guarana (Paullinia cupana) Seed Extract is third of 22, and Green Tea (Camellia sinensis) Leaf Extract is seventh (Olivaro label).
The blend totals 200 mg and the label prints no amount for any single row. If the 22 were equal, each would be about 9.1 mg (200 / 22), but the label does not say they are equal.
FDA's rule says a blend lists its ingredients in descending order by weight, as read in the rule that (21 CFR 101.36(c), proprietary blends) cites. If the label follows it, guarana outweighs green tea. We did not verify the order.
| Name on the label | Green Tea Leaf Extract and Guarana Seed Extract (in the 200 mg blend) |
|---|---|
| What it is | Two plant extracts that can carry caffeine; the label prints no amount for either and does not state a caffeine amount |
| What it is sold for | Sold for energy and metabolism |
| Amount on the label | amounts not printed |
| Amount used in research | A meta-analysis of 6 trials of green tea in prediabetes or type 2 diabetes; a guarana review; FDA's caffeine page; LiverTox |
| What the studies found | A 2017 meta-analysis of six randomized trials in 382 people with prediabetes or type 2 diabetes found no difference in HbA1c or fasting glucose with green tea. A review says guarana seeds can hold up to 6% caffeine and are mostly used in soft and energy drinks. FDA says 400 mg of caffeine a day is not generally associated with dangerous effects in healthy adults, and that supplements add to that total. The label does not say how much caffeine Olivaro holds. LiverTox lists green tea extract as linked to liver injury case reports. |
| Main caution | Caffeine can cause jitters, a faster heartbeat and poor sleep, and can affect people on some medicines. LiverTox lists green tea extract as linked to liver injury reports; stop and get care for dark urine, yellow skin or eyes. |
Caffeine
How much caffeine is in Olivaro?
We cannot say. The label prints no caffeine amount, and it names two ingredients that can carry caffeine.
A review of guarana found the seeds can hold up to 6% caffeine and are used mostly in soft and energy drinks (Schimpl 2013, guarana review). That figure describes the seed itself, not this blend row. Green tea leaf also contains caffeine, and the label gives no extract strength.
So the honest reading is "some, unknown". We cannot call the liquid free of caffeine or of stimulants. FDA says 400 mg a day is not generally linked to dangerous effects in most healthy adults, that caffeine adds up across drinks and foods, and that supplements add to the total (FDA, Spilling the Beans caffeine). That figure is a reference level for the day, not a dose in this bottle.
The studies
Does green tea extract change blood sugar in studies?
In a 2017 meta-analysis, green tea made no difference to HbA1c or fasting glucose in people with prediabetes or type 2 diabetes (Yu 2017, green tea glycemic meta).
The analysis pooled 6 randomized trials with 382 people. The authors also note an earlier analysis of 17 trials that reported small falls in glucose measures, so the literature is not uniform. The abstract gives no single dose we can compare with the bottle.
No trial tested Olivaro. We found no study of guarana alone on blood sugar, and the guarana review we read is about composition and use, not about glucose. The front line is “Balanced Blood Sugar Advanced Support*”, and we found no study showing green tea or guarana at an unprinted amount changes a blood sugar reading.
Amounts
How well do human studies support these two extracts?
Poorly for the label's blood sugar line. The needles below are an editor's reading of the human studies, not a measurement and not a rating of Olivaro.
Chromium
Little22 of 100
NIH says the effect on glucose in people with diabetes is small and its significance unclear; the label's 0.7 mcg is 2% of the Daily Value. (NIH ODS, Chromium) (Zhao 2022, chromium type 2 diabetes meta)
Gymnema
Little18 of 100
Small, mixed studies at amounts far above anything the 200 mg blend could hold for one ingredient. (Devangan 2021, gymnema type 2 diabetes meta) (LiverTox, Gymnema)
Green tea and guarana
Little15 of 100
Trials of green tea show little glycemic effect; both are caffeine sources, and the label prints no amounts. (Yu 2017, green tea glycemic meta) (Schimpl 2013, guarana review)
Ginseng and herbs
Little15 of 100
Small trials of single herbs at studied amounts; none at the unstated amounts in this blend. (Shishtar 2014, ginseng glycemic meta) (Hong 2024, astragalus type 2 diabetes meta)
Amino acids
Very little5 of 100
No human trial found at the unstated amounts, so there is nothing to set the label beside. (Saldanha 2023, proprietary blends perspectives)
Our reading of the sources, not a measurement. Each needle is an editor's judgment of how well human studies support the label's blood sugar lines for that ingredient group, at studied amounts. It does not rate Olivaro: no study tested the liquid or this 22-ingredient blend.
Liver
Can green tea extract affect the liver?
Yes, rarely. LiverTox lists green tea extract as linked to liver injury in case reports, with a genetic marker, HLA-B*35:01, noted in some cases (LiverTox, green tea).
These are case reports, not a rate, and we have no information that Olivaro was involved in any. The label prints no green tea amount. Stop and get care for dark urine, yellow skin or eyes, or belly pain, and tell the clinician what you take. Anyone with liver disease should ask a clinician first.
Olivaro liquid: 30 mL a bottle1 mL serving · 2, 3 or 6 bottles · from $49 a bottle · shipping at checkout
See the priceWho should ask first
Who should ask a clinician before taking caffeine sources?
Anyone sensitive to caffeine, with sleep trouble, anxiety, a heart-rhythm problem or high blood pressure should ask first, and so should anyone on regular medicines.
The label tells pregnant or nursing mothers, children under 18 and people with a known medical condition to consult a physician. Caffeine totals add up across coffee, tea and energy drinks, and the label gives no figure to add.
Medicines
Ask a pharmacist about insulin, diabetes pills, and blood pressure, blood thinner and heart-rhythm medicines. See medicine interactions.
Diabetes medicine
Keep taking prescribed medicine exactly as directed. Never stop or change it because of a supplement.
Warning signs
Chest pain, fainting or trouble breathing: call 911. Severe low blood sugar (confusion, fainting, seizure): call 911.
Claims
Is the guarana in Olivaro proven to work?
No. We found no trial of guarana at the unprinted amount in this blend, and no trial of this liquid.
The row is on the panel, and the front says “Balanced Blood Sugar Advanced Support*”. The star leads to the FDA statement that these claims have not been evaluated. FDA does not approve supplements before they are sold (FDA 101 supplements). Health claims need competent and reliable scientific evidence (FTC health products guidance).
Next steps
What should you read next?
Read the other ingredient groups, then check the price and guarantee before you decide.
The ingredients hub covers every row. The supplement facts page transcribes the panel. The seller lists 2 bottles at $79 each ($158, plus shipping on that block), 3 at $69 each ($207) and 6 at $49 each ($294), with a 60-day money-back guarantee that, per the seller's checkout, applies after at least 30 days of use; read the live terms and confirm at the live checkout. See the pricing page.
FAQ
Green tea and guarana questions
Does Olivaro contain caffeine?
It can. Guarana seed extract and green tea leaf extract are both in the blend, and both can carry caffeine, but the label prints no caffeine amount and no amount for either extract. We cannot say how much a serving holds.
Is guarana the same as caffeine?
No. Guarana is a plant whose seeds can hold up to 6% caffeine, according to one review. Caffeine is one compound found in it. The label lists the seed extract, not caffeine, and prints no amount for either.
How much caffeine is too much in a day?
FDA says 400 mg a day is not generally linked to dangerous effects in most healthy adults. Sensitivity varies, and pregnancy, sleep trouble or heart conditions change the picture, so ask a clinician. The Olivaro label gives no caffeine figure to count.
Can green tea extract hurt the liver?
Rarely. LiverTox lists green tea extract in liver injury case reports. Dark urine, yellow skin or eyes, or belly pain are reasons to stop and get care. We have no information tying Olivaro to any case, and the label prints no amount.
Did trials show green tea changes HbA1c?
In a 2017 meta-analysis of 6 trials and 382 people with prediabetes or type 2 diabetes, green tea made no difference to HbA1c or fasting glucose. No trial tested Olivaro, and the label's green tea amount is not printed.
Should I take Olivaro in the evening?
The label gives no time of day. It names two caffeine sources with no caffeine amount, so people who notice poor sleep or jitters may want to ask a clinician or pharmacist about timing before using it.
Who wrote this
Written and reviewed by
Pages built from the label, the seller's brief and linked NIH, FDA, CDC, FTC and peer-reviewed sources.
Last updated . Read our editorial standards and how we check reviews. This website is the information site of a USA Authorized Olivaro Retailer. It is not the manufacturer, and the label names Instituto Experience as the distributor. We earn money when you buy through our order links.
Keep reading
More about Olivaro
USA Authorized Olivaro Retailer
Ready to look at Olivaro?
Check your medicines first, and ask a clinician or pharmacist if you take diabetes medicine or insulin. Then pick a pack: 2, 3 or 6 bottles of 30 mL. Packs are listed at $79, $69 and $49 a bottle with a 60-day money-back guarantee (after at least 30 days of use); confirm the total and shipping at checkout.
- Secure checkout on the seller's site
- 60-day money-back guarantee, per the seller
- Shipping shown at checkout
