Turmeric and curcumin
Turmeric and Curcumin in Synaptril: What About Memory?
Curcumin and memory research is mixed: a pooled review of 10 trials found no gain in overall thinking, with some signal for working memory. Synaptril lists turmeric extract, 95% curcuminoids, as line 5 of its blend. Blend math caps it at about 44 mg a capsule, with no absorption aid listed.
Written by the Synaptril label deskUpdated
The basics01
What is turmeric extract with 95% curcuminoids?
Turmeric extract with 95% curcuminoids is a concentrate of the turmeric root in which curcumin and its close relatives make up 95% of the weight. Curcumin is the yellow compound behind most curcumin memory research.
Synaptril lists it as "Turmeric (Curcuma longa) Rhizome Extract 95% Curcuminoids", fifth of six in the 575 mg blend. The label gives no amount.
The 95% figure is purity, not dose. It says nothing about how much extract is in the capsule.
| Name on the label | Turmeric (Curcuma longa) Rhizome Extract 95% Curcuminoids |
|---|---|
| What it is | Curcuma longa root, standardized to curcuminoids |
| Place on the label | Line 5 of 6 in the 575 mg proprietary blend |
| Amount per capsule | At most 44 mg (label order and magnesium math); 115 mg by label order alone |
| Amount used in research | 180 mg a day of a high-absorption curcumin in one memory trial |
| Strength of evidence | Mixed; poorly absorbed |
| Marketed or traditional use | Yellow spice; antioxidant and anti-inflammatory research |
| Main caution | Rare liver injury, mostly with high-absorption forms; stomach upset; may be unsafe in pregnancy. |
More on the purity figure: what 95% curcuminoids means.
The evidence02
Does curcumin improve memory?
Curcumin has not been shown to improve memory overall. A 2025 review of 10 human trials found no gain in global thinking scores, though working memory and processing speed did improve (Yu et al., J Prev Alz Dis 2025).
The review covered 531 people. Side effects were more common with curcumin than with placebo, and the authors called the findings inconsistent.
The National Center for Complementary and Integrative Health agrees. It says there is not enough evidence that turmeric or curcumin helps any health purpose (NCCIH, Turmeric), and that curcumin evidence for thinking is too limited to support a conclusion (NCCIH, Supplements for Cognitive Function).
| Source | What was studied | What it found |
|---|---|---|
| Review of 10 trials, 2025 | 531 people, various curcumin products | No global cognition gain; working memory and speed improved |
| 18-month trial, 2018 | 40 adults aged 51-84, 180 mg a day of a high-absorption curcumin | Better long-term memory recall and attention |
| NCCIH summary | All turmeric and curcumin research | Not enough evidence for any use |
One trial03
What did the 18-month curcumin memory trial find?
The 18-month trial found better long-term memory recall in adults who took a high-absorption curcumin, 90 mg twice a day (Small et al., Am J Geriatr Psychiatry 2018). It is the most quoted curcumin memory result, and it is small.
Forty adults without dementia took part: 21 on curcumin and 19 on placebo. Attention also improved. The difference between groups only just reached the usual test of significance.
The product was Theracurmin, a specially formulated curcumin built to absorb better. The maker supplied the curcumin and the placebo. And 40 people is too few to settle the question.
Synaptril does not list Theracurmin or any absorption-boosting form. So this trial describes a different product at a larger, better-absorbed dose.
Absorption04
Is curcumin absorbed well enough to matter?
Plain curcumin is poorly absorbed. It is broken down and cleared quickly, so blood and tissue levels stay low (Anand et al., Mol Pharm 2007).
Researchers have tried to fix that with piperine from black pepper, liposomes, nanoparticles and phospholipid complexes (Anand et al., Mol Pharm 2007). Each aims to keep more curcumin in the body for longer.
The Synaptril label lists no piperine and no special carrier. The other ingredients are the capsule shell and flow agents. A standard 95% extract is what the label describes.
That cuts both ways. Low absorption limits any effect, but the liver cases discussed below cluster around high-absorption forms. The curcumin bioavailability post has more.
Synaptril: from $49 a bottle30 capsules · 2, 3 or 6 bottles · free shipping on 3 or 6 · 60-day guarantee
See packsBlend math05
How much curcumin is in a Synaptril capsule?
A Synaptril capsule holds at most about 44 mg of turmeric extract, which is about 42 mg of curcuminoids. The true amount may be much lower.
Start with the magnesium. The label prints 80 mg, and magnesium glycinate is about 14% magnesium (GlobalRPH, Magnesium Glycinate), so it takes about 567 mg. That leaves about 8 mg of the 575 mg blend for five ingredients.
In the generous case, a 20% grade, 175 mg is left. Turmeric is fifth, so it cannot outweigh the four lines above it: 175 divided by 4 is about 44 mg. At 95% purity, that is about 42 mg of curcuminoids.
The 18-month trial used 180 mg a day of a form made to absorb better. Forty-two milligrams of a standard extract is less than a quarter of that, before absorption is even counted.
Slide the magnesium share below to see how fast the room shrinks.
At 14.1%, 80 mg of magnesium needs about 567 mg of magnesium glycinate. That leaves about 8 mg for alpha lipoic acid, butcher's broom, L-carnitine, turmeric and CoQ10 together.
- Magnesium glycinate567 mg
- Alpha lipoic acidat most 8 mg
- Butcher's broomat most 4 mg
- L-carnitineat most 3 mg
- Turmeric (95% curcuminoids)at most 2 mg
- Coenzyme Q10at most 2 mg
Arithmetic from the label (80 mg magnesium, 575 mg blend, listed most to least by weight (21 CFR 101.36, Supplement Facts)) and the magnesium share of magnesium glycinate (GlobalRPH, Magnesium Glycinate). The exact grade used is not printed, so we show the range. Ceilings, not amounts.
Safety06
Is turmeric safe to take every day?
Turmeric is likely safe for most adults in normal amounts for 2 to 3 months, with nausea, reflux and diarrhea as the usual side effects (NCCIH, Turmeric). The serious but rare risk is liver injury.
NIH's LiverTox lists several dozen cases of acute liver injury from turmeric products, including one death (NIH LiverTox, Turmeric). Many involved high-absorption curcumin or piperine blends, but some came from plain turmeric powder and tea.
Liver warning signs
Dark urine, yellow skin or eyes, or unusual tiredness. Stop the capsule and call a doctor.
Pregnancy
Turmeric supplements may be unsafe in pregnancy (NCCIH, Turmeric). The Synaptril label already rules out pregnant and nursing mothers.
Your medicines
NCCIH names no specific drug interaction for turmeric. Ask your pharmacist to check your list anyway.
Never stop or change a prescription to make room for a supplement. Questions about blood thinners are covered in turmeric and blood thinners, and the full list is on Synaptril side effects.
Verdict07
Is the turmeric in Synaptril enough to help memory?
Probably not on its own. The turmeric in Synaptril is a standard extract at a few dozen milligrams, while the one positive memory trial used a better-absorbed form at a larger dose.
It is a reasonable minor ingredient, and the 95% standard is clearly stated. Read it as a small extra, not as the reason to buy.
Pros
- Purity printed: 95% curcuminoids
- Not a high-absorption form tied to most liver cases
- Small amount, so stomach upset is less likely
Cons
- At most about 42 mg of curcuminoids
- No absorption aid listed
- No overall memory benefit in pooled trials
All six lines side by side: Synaptril ingredients.
FAQ08
Turmeric and curcumin questions, answered
Does the turmeric in Synaptril contain black pepper extract?
No. The Synaptril label lists no piperine or black pepper extract. The other ingredients are the hypromellose capsule, microcrystalline cellulose, magnesium stearate, stearic acid and silicon dioxide, so the turmeric is a standard 95% extract without an absorption aid.
How many milligrams of curcuminoids are in one Synaptril capsule?
At most about 42 mg. Turmeric extract is fifth in a blend that magnesium glycinate mostly fills, so it can hold no more than about 44 mg, and 95% of that is curcuminoids. The label prints no exact amount.
Is the curcumin in Synaptril the same as Theracurmin?
No. Theracurmin is a specially formulated curcumin made to absorb better, and it was used in the 18-month memory trial. Synaptril lists a plain turmeric rhizome extract standardized to 95% curcuminoids, with no special carrier named.
Can I take Synaptril if I already use a turmeric supplement?
Ask your doctor or pharmacist first. The two would add up, and liver injury from turmeric, though rare, is well documented. Watch for dark urine, yellow skin or unusual tiredness, and stop if any appear.
Why does Synaptril use turmeric in a brain supplement?
The label does not explain the choice. Curcumin is studied for antioxidant and anti-inflammatory effects, and pooled trials show some working-memory signal but no overall thinking benefit. No study has tested turmeric at Synaptril's amount.
Who wrote this09
Written and reviewed by
Pages built from the label, the sales page and linked NIH, FDA, CDC, FTC and peer-reviewed sources.
Last updated . Learn about our editorial standards and how we check reviews. This website is run by a U.S. retail partner of Synaptril, not by the manufacturer or the distributor. We make money when you buy through our order links.
Keep reading
Related Synaptril reading
U.S. retail partner of Synaptril
Ready to try Synaptril?
Check your medicines, then choose a pack. Packs of three or six bottles ship free at a lower price per bottle, and all of them carry the 60-day money-back guarantee.
- Secure BuyGoods checkout
- 60-day money-back guarantee
- Ships from the U.S.
