Guide · Safety
HMPA water side effects: is it safe?
Short answer
We haven't found reports of specific side effects from HMPA in the published research, and your gut already makes small amounts of HMPA from grains. But long-term human data is thin: the only human study ran 12 weeks at 23 mg a day. Pregnant or breastfeeding women, children and people on medication should ask a doctor first.
What we know about HMPA safety
| Question | What we found |
|---|---|
| Is HMPA natural? | Yes. It's in fermented rice bran, and gut bacteria make it from ferulic acid in grains. |
| Dose studied in people | 23 mg a day for 12 weeks (one company-reported study) |
| Side effects reported | None specific that we've found in published summaries. We haven't seen the full adverse-event data. |
| Long-term human data | None beyond 12 weeks |
| Sold where | Japan, as Food with Function Claims products (company-filed safety evidence) |
| India status | New ingredients need FSSAI approval; we'll publish ours before launch |
“No side effects reported” is not the same as “proven to have none”. The honest summary: HMPA looks low-risk at the studied dose, and the evidence is still young.
How much HMPA is safe to drink?
The only dose with human data is 23 mg a day, the amount in one Tokusui bottle and the target for one Get Waisted can. There is no evidence that more does anything extra, so there's no reason to drink several a day. Stick to one serve.
Who should check with a doctor first
- Pregnant or breastfeeding women, since HMPA hasn't been studied in pregnancy.
- Anyone under 18.
- People on regular medication, especially for diabetes, blood pressure or cholesterol.
- People with liver or kidney disease.
- Anyone with a history of eating disorders, because HMPA is talked about in a weight context.
Does HMPA water cause rapid weight loss?
No, and anything that does should worry you. The human study measured a small drop in visceral fat area (4.2 cm²) over 12 weeks, not kilos off the scale. If an “HMPA” product promises fast weight loss, check the label for hidden stimulants or diuretics, and ask for its lab report. Read HMPA and fat loss for what the research actually shows.
What about the water and the can?
HMPA water is mostly water, so the other safety questions are the usual ones for any packaged drink: is the water clean, and is the pack food-safe? That's what the batch report answers. Each Get Waisted can's QR code opens the lab results for its batch, covering the HMPA amount and the water quality.
This page is general information, not medical advice. Talk to a doctor before starting a supplement or a weight-loss plan, especially if you're pregnant, on medication or managing a health condition.
Questions people ask
Does HMPA water have side effects?
We haven't found reports of specific side effects in published HMPA research. Human data is limited to one 12-week study at 23 mg a day, so long-term effects are unknown.
Is HMPA water safe to drink every day?
One serve a day (about 23 mg of HMPA) is the amount studied in people, for 12 weeks. There's no evidence that more helps. Ask a doctor first if you're pregnant, under 18, on medication or managing a health condition.
Can HMPA water cause stomach problems?
We haven't seen digestive side effects reported for HMPA. Your gut already produces HMPA from grains. If any new drink upsets your stomach, stop and speak to a doctor.
Is HMPA water safe during pregnancy?
It hasn't been studied in pregnancy or breastfeeding, so speak to your doctor before trying it.
Is HMPA approved in India?
New ingredients in India go through FSSAI's approval process. Get Waisted will publish its regulatory status on this site before going on sale.
Sources
- 01ReFa Slim Up Vinegar: 12-week HMPA study summary (74 adults, BMI 23–30, 23 mg/day).Company-reported · humans
- 02Suntory customer FAQ: HMPA and fermented rice bran (Japanese).Manufacturer
- 03Ohue-Kitano et al. (2023). HMPA contributes to improved hepatic lipid metabolism via GPR41. Scientific Reports.Peer-reviewed · mice
- 04Ohue-Kitano et al. (2019). HMPA produced from HMCA by gut microbiota improves host metabolic condition in diet-induced obese mice. Nutrients.Peer-reviewed · mice
- 05Effects of HMPA on enhancing grip strength and inhibiting protein catabolism induced by exhaustive exercise (2024). International Journal of Molecular Sciences.Peer-reviewed · mice
Keep reading
- Guide · Fat lossDoes HMPA help with fat loss?Does HMPA help you lose fat? We read every study: GPR41 mouse data and a 12-week human study (74 adults, 23 mg a day) on visceral fat. Honest, with sources.→
- Guide · ProcessHow is HMPA water made?How HMPA is made from rice bran by fermentation, how it gets into water and how it's tested, plus why a home-made rice ferment isn't HMPA water.→
- Research trackerEvery HMPA study, in one placeEvery HMPA study in plain English: what was tested, in whom, at what dose and what it found, from the GPR41 mouse studies to the 12-week human study.→
Batch 002 is in the lab
Report first. Can second.