Saffron at supplement doses has been through more than 100 clinical trials, and there is a short list of sensible checks that responsible brands print rather than bury. Here is the full picture, including who should leave it alone.
What the studies reported
A 2026 systematic review of 102 clinical trials found stomach and gut upsets were the most common side effects, minor and short-lived in most cases, and advised monitoring at higher doses or with longer use. Most trials ran for 4 to 12 weeks, so they say little about rarer effects. The alarming stories about saffron involve gram-level amounts, not the milligram amounts used in trials.
Who should not take saffron
Do not take our Saffron Gummies if you:
- are pregnant, trying to get pregnant, breastfeeding or under 18
- are allergic to any ingredient, including moringa, rhodiola and spirulina
- have phenylketonuria (PKU) or are prone to allergies (for the spirulina)
- have an autoimmune condition or take immunosuppressants, unless your doctor agrees (for the spirulina)
Ask your GP or pharmacist first if you:
- have bipolar disorder, or take antidepressants or other mood medication (for the saffron and rhodiola)
- take blood thinners such as warfarin, aspirin or clopidogrel, blood pressure medication or diabetes medicine
- take digoxin, water tablets or epilepsy medicine such as phenytoin (for the vitamin D3 and rhodiola)
- have a thyroid condition or take thyroid medicine (for the moringa)
- have a liver condition (for the rhodiola)
- have, or have had, a hormone-sensitive condition, such as breast or womb cancer (for the maca)
- are having hormone blood tests: tell your doctor you take maca
- have high calcium in your blood or urine, high vitamin D levels, kidney problems or kidney stones, or sarcoidosis (for the vitamin D3)
- are prescribed vitamin D: the NHS says not to add other vitamin D or calcium supplements without your doctor's advice
- have an operation coming up or another long-term condition, or take any other regular medicine
The risk nobody prints: the product itself
Saffron is one of the most adulterated spices on Earth, routinely cut with safflower, turmeric or dyed fibres. An untested saffron supplement is a bigger safety question than saffron. The fix is boring and effective: standardisation percentages on the label and third-party lab testing. Ours has both.
How we formulate for safety
Our Saffron Gummies hold 300mg of saffron, from a 10:1 extract standardised to 3.5% crocin and safranal, per serving, print every active on the label, use pectin instead of gelatine, skip added sugar entirely, and are third-party lab tested. They also contain 50 micrograms of vitamin D3, so take no more than two a day and count any other vitamin D you take.
Taking saffron and ashwagandha on the same day? See Can You Take Saffron and Ashwagandha Together? A UK Guide for what is in each bottle, the one ingredient they share and who should check first.
Common questions
Can I take saffron long term?
Most saffron trials ran for 4 to 12 weeks, so there is little evidence on longer use, and a 2026 review of 102 trials advised monitoring with prolonged use. Stay at the label dose, review how you feel, and talk to your GP if you take regular medication or have a long-term condition.
Does saffron interact with alcohol?
There is little research on saffron with alcohol, so there is no evidence either way. A supplement is not a licence to drink more.
What symptoms mean stop?
Anything persistent or unusual after starting a new supplement is a stop-and-ask-your-pharmacist moment, saffron included.
Read next
- Saffron Dosage: How Much Per Day?
- Best Saffron Gummies UK 2026
- Saffron for Mood: What the Research Says
Last reviewed and updated August 2026. We refresh our articles every 90 days with the latest UK supplement-safety guidance, new internal links to related research, and any updates to dosing or ingredient evidence. This article is general information, not medical advice. Speak to your GP or pharmacist if you take regular medication.
