Cinna Harmony Side Effects: Ingredients, Interactions and Pets
Written by the Cinna Harmony editorial team
Last updated · Who reviewed this page · How we write and review
Cinna Harmony side effects come from its ingredients, and the main one is low blood sugar for people on diabetes drugs.
The licorice compound can raise blood pressure, guarana and green tea add caffeine, and xylitol is toxic to dogs.
Does Cinna Harmony have side effects?
No one knows the exact side effects of Cinna Harmony, because the finished drops have never been tested in a published study. What we can describe comes from research on single ingredients. The label also asks anyone with a medical condition to consult a physician first.
Cinna Harmony is a supplement, not a diabetes medicine. It never replaces insulin, metformin or any drug your doctor prescribed.
Most serious
Low blood sugar in people on insulin or diabetes pills, since several herbs may add to those drugs.
Most likely
Caffeine effects such as jitters or poor sleep. Guarana and green tea add caffeine in an unprinted amount.
Rare but known
Liver injury from green tea extract, and higher blood pressure from the licorice compound.
Why are Cinna Harmony side effects hard to predict?
Cinna Harmony side effects are hard to predict because key amounts are missing from the label. Only chromium has its own amount, 0.7 mcg per ml. The other 22 ingredients share one 200 mg blend with no single amounts.
A risk that depends on dose, like caffeine or glycyrrhizin, cannot be sized from the outside. These facts are not published:
- How much of each ingredient sits inside the 200 mg blend
- How much caffeine the guarana and green tea add
- How much glycyrrhizin the licorice compound adds
- Any clinical study of the finished drops
Cinna Harmony ingredient safety table
Each Cinna Harmony ingredient brings its own caution. The table lists the main one from a public health source or published study.
| Ingredient | In Cinna Harmony | Main safety note | Source |
|---|---|---|---|
| Chromium | 0.7 mcg (as picolinate) | May add to the effect of insulin or diabetes pills. | (NIH ODS, 2022) |
| Gymnema | In 200 mg blend | May lower blood sugar; rare liver injury reported. | (LiverTox (NIDDK), 2024) |
| Panax ginseng | In 200 mg blend | Might lower blood sugar; talk to your provider if you have diabetes. | (NCCIH, 2025) |
| Licorice compound | In 200 mg blend | Glycyrrhizin can raise blood pressure, lower potassium and upset heart rhythm. | (NCCIH, 2025) |
| Guarana | In 200 mg blend | Adds caffeine: fast heartbeat, poor sleep, shakiness. | (FDA, 2024) |
| Green tea extract | In 200 mg blend | Adds caffeine; extracts are a rare, known cause of liver injury. | (LiverTox (NIDDK), 2020) |
| Eleuthero | In 200 mg blend | May raise digoxin side effects. | (MSKCC, 2022) |
| L-arginine | In 200 mg blend | Might lower blood pressure and blood sugar. | (Mayo Clinic, 2026) |
| Grapefruit extract | In 200 mg blend | The FDA warning covers grapefruit juice, not extracts. Ask a pharmacist if your medicine has a grapefruit warning. | (FDA, 2021) |
| Astragalus | In 200 mg blend | A full safety review has not been done. | (NCCIH, 2025) |
| Raspberry ketones | In 200 mg blend | No evidence they are safe or effective. | (OPSS (DoD), 2021) |
| Xylitol | Other ingredient | Toxic to dogs. Keep the bottle away from pets. | (FDA, 2025) |
Can Cinna Harmony cause low blood sugar?
Cinna Harmony could add to low blood sugar in people who already take insulin or diabetes pills. Gymnema, ginseng and chromium may each lower blood sugar and add to those drugs (LiverTox (NIDDK), 2024) (NCCIH, 2025) (NIH ODS, 2022).
L-arginine might lower blood sugar too (Mayo Clinic, 2026). The amounts of these herbs are not printed, so the size of the effect is unknown.
Who is most at risk
- People who use insulin
- People on metformin or other diabetes pills
- Anyone who takes several prescription drugs at once
Common signs of low blood sugar
- Shakiness, sweating or a pounding heart
- Sudden hunger, dizziness or a headache
- Confusion or blurred vision
Can Cinna Harmony raise blood pressure?
Cinna Harmony might raise blood pressure in some people. The blend includes monoammonium glycyrrhizinate, a licorice compound. Glycyrrhizin can raise blood pressure and drain potassium in larger amounts (Falet et al., 2019).
NCCIH notes that even small amounts have been linked to harm in people with high blood pressure, heart or kidney disease (NCCIH, 2025). Caffeine from guarana and green tea can push blood pressure up as well.
Ask a doctor first if you take blood pressure or heart medicines.
Does Cinna Harmony cause jitters or trouble sleeping?
Cinna Harmony could cause jitters or poor sleep in people sensitive to caffeine. Guarana and green tea both supply caffeine, and the label does not print how much.
The FDA says too much caffeine can cause a fast heartbeat, shakiness, poor sleep and an upset stomach (FDA, 2024). It cites 400 mg a day as an amount not generally linked to harm in most healthy adults.
- Count coffee, tea, soda and energy drinks along with the drops
- Take the drops early in the day, as the sales FAQ suggests
- Drop to 1 dropper, or stop, if you feel wired or restless
Is the green tea extract in Cinna Harmony safe for your liver?
For most people, liver trouble from green tea extract is rare, but it is real. LiverTox calls green tea extract a well-established cause of liver injury (LiverTox (NIDDK), 2020). In one trial, a liver enzyme rose in 6.7% of extract users versus 0.7% of controls.
Gymnema has rare liver injury reports too (LiverTox (NIDDK), 2024). The amounts of both in Cinna Harmony are not printed.
Liver warning signs: stop and call a doctor
- Yellow skin or yellow whites of the eyes
- Dark urine or pale stools
- Pain in the upper right belly
- Unusual tiredness, nausea or loss of appetite
Which medicines need a doctor's check before Cinna Harmony?
Any prescription drug deserves a check before Cinna Harmony, and some matter more than others. The table shows which ingredients raise each concern.
| Medicine type | Cinna Harmony ingredients involved | Concern |
|---|---|---|
| Insulin and diabetes pills | Gymnema, ginseng, chromium, L-arginine | Blood sugar may drop too low |
| Blood pressure medicines | Licorice compound, guarana, green tea, L-arginine | Blood pressure may rise or fall |
| Digoxin | Eleuthero | Digoxin side effects may rise |
| Drugs with a grapefruit warning | Grapefruit extract | Ask a pharmacist; the FDA warning is about juice |
| Heart, thyroid or mood medicines, blood thinners | Not pinned to one ingredient | Named in our medicine note; ask first |
Our article on study doses explains how gymnema and chromium were tested.
Is Cinna Harmony safe around dogs and children?
No. Keep Cinna Harmony away from dogs and children. Xylitol is one of the other ingredients, and it can make a dog's blood sugar drop fast within 10 to 60 minutes (FDA, 2025).
The label says to keep the bottle out of the reach of children. It also says not to use it if the safety seal is damaged or missing.
What to do if something feels wrong on Cinna Harmony
If something feels wrong on Cinna Harmony, stop taking it first. Then match your next step to how serious the symptom is.
- 1
Stop the drops
Skip the next dose. Do not push through a reaction.
- 2
Get urgent help if severe
Call 911 for chest pain, trouble breathing, fainting or confusion.
- 3
Check your blood sugar
If you use a meter, check it and follow your doctor's plan for a low.
- 4
Call your doctor
Bring the bottle so they can read the full ingredient list.
- 5
Contact the order desk
For a refund, call +1 (302) 200-3480 with your order ID.
Read how our medical reviewer checks the safety wording on this site.
Who should not take Cinna Harmony?
People under 18 should not take Cinna Harmony without a physician's advice, and neither should pregnant or nursing women. The label asks those groups, and anyone with a known medical condition, to consult a physician first.
Others need a clear yes from their doctor. The who it is for page has a full fit guide.
- People on insulin, metformin or other diabetes drugs
- People with high blood pressure, heart or kidney disease
- People who take digoxin or a drug with a grapefruit warning
- People with liver disease or who are sensitive to caffeine
Cinna Harmony side effects: common questions
Questions people type into Google and Bing, answered from the label and the sources on this page.
What are the side effects of Cinna Harmony?
The finished drops have never been tested, so their side effects are unknown. The ingredients have known risks: low blood sugar with diabetes drugs, caffeine effects, higher blood pressure from licorice, and rare liver injury from green tea extract.
Can Cinna Harmony cause low blood sugar?
It could in people who take insulin or diabetes pills. Gymnema, ginseng and chromium may each add to those drugs. Talk to your doctor first and keep checking your blood sugar as advised.
Can Cinna Harmony raise blood pressure?
It might. The blend holds a licorice compound, and glycyrrhizin can raise blood pressure and lower potassium in larger amounts. Guarana and green tea add caffeine, which can also push blood pressure up.
Does Cinna Harmony cause jitters or trouble sleeping?
It could in people sensitive to caffeine. Guarana and green tea both supply caffeine, but the amount is not printed. Count your coffee and tea too.
Can green tea extract hurt your liver?
Rarely, yes. LiverTox calls green tea extract a well-established cause of liver injury, while drinking green tea has not been linked to it. Stop and call a doctor if your skin or eyes turn yellow.
Is licorice in supplements dangerous?
It can be for some people. Glycyrrhizin has been linked to an irregular heartbeat and to harm in people with high blood pressure, heart or kidney disease. Cinna Harmony does not print how much it holds.
Can Cinna Harmony upset your stomach?
It might. No study has looked at the drops, but too much caffeine can cause an upset stomach. If your stomach reacts, stop and tell your doctor.
Does Cinna Harmony interact with medications?
Some ingredients may. Diabetes drugs, blood pressure and heart medicines, digoxin and any drug with a grapefruit warning need a check first. Show the full label to your doctor or pharmacist.
Is xylitol in Cinna Harmony dangerous for dogs?
Yes. Xylitol is one of the other ingredients, and the FDA warns it can drop a dog's blood sugar within 10 to 60 minutes. Keep the bottle closed and out of a pet's reach.
Who should stop taking Cinna Harmony?
Stop if you feel shaky, dizzy, a racing heart, swelling, or signs of liver trouble. Stop too if you become pregnant, start a new medicine, or your doctor tells you to.
