All categories
Supplements & herbs
Protein, collagen, botanicals
Products & items
- Protein powderPlain protein is rarely the concern — the added blend is.
- Collagen powderPopular protein supplement with limited pregnancy research.
- CreatinePerformance supplement without established pregnancy dosing guidance.
- AshwagandhaAdaptogenic herb widely advised against in pregnancy.
- Magnesium supplementMineral supplement often used for cramps and sleep.
- Melatonin sleep gummiesOver-the-counter sleep supplement containing the hormone melatonin.
- CBD oil and ediblesCannabis-derived products, including CBD formulations that may also contain THC.
- Fish oil / DHAOmega-3 supplements taken for fetal brain development.
- Elderberry syrupPopular cold-season herbal syrup and gummies.
- EchinaceaHerbal immune supplement.
- Fenugreek capsulesHerbal supplement widely taken to try to increase milk supply.
- MoringaLeaf powder and capsules used as a green supplement.
- Sea moss gelSeaweed gel and capsules sold as a mineral supplement.
- Apple cider vinegarVinegar drinks and gummies taken as a daily supplement.
- Green tea extractConcentrated green tea capsules and weight-loss blends.
- Greens powderAlgae-based greens blends.
- CoQ10 supplementAn antioxidant supplement popular with people trying to conceive, especially over 35.
- Myo-inositolA supplement often discussed for cycle regularity in PCOS.
- Vitex (chasteberry)A herbal supplement marketed for cycle and hormone support.
- Maca powderA root powder sold for energy, libido and fertility.
- Evening primrose oilAn oil supplement sometimes used in the first half of the cycle when trying to conceive.
- Soy isoflavone supplementConcentrated plant-oestrogen capsules, distinct from eating soy foods.
- Red clover teaA herbal tea or supplement containing oestrogen-like plant compounds.
- Dong quaiA traditional herbal root sometimes included in 'fertility blends'.
- DHEA supplementA hormone supplement occasionally used in fertility treatment under supervision.
- Royal jellyA bee product marketed for fertility, with allergy as the main documented risk.
Ingredients & components
- Protein powderCautionPlain protein is not the issue — added herbs, high vitamin doses, stimulants, sweeteners and heavy-metal contamination are.
- Collagen peptidesInsufficient evidencePregnancy-specific data is limited; plain collagen is usually viewed as low concern but is not well studied.
- CreatineInsufficient evidenceStudied with interest in pregnancy research, but not established for routine supplement use — discuss with your clinician.
- AshwagandhaNot recommendedGenerally not recommended during pregnancy.
- MagnesiumCautionCommonly used for cramps and sleep at ordinary supplemental doses; check the dose with your clinician.
- MelatoninInsufficient evidenceThere isn't enough good evidence to say melatonin is safe in pregnancy — Trimestly can't confidently call this low risk.
- Cannabis and CBDNot recommendedNot recommended in pregnancy in any form, including CBD products and edibles.
- Turmeric and curcuminCautionFine as a spice in cooking; concentrated curcumin supplements are not generally recommended.
- Omega-3 / DHAGenerally safeGenerally considered low risk and often encouraged — choose a purified fish oil or algae-based DHA, not cod liver oil.
- ElderberryInsufficient evidenceTrimestly cannot confidently determine that elderberry supplements are safe in pregnancy — there is very little human data.
- EchinaceaCautionShort-term use has not been clearly linked with harm, but the evidence is thin — check with your clinician first.
- PeppermintGenerally safePeppermint tea in normal amounts is generally considered low risk.
- FenugreekNot recommendedMedicinal doses are not generally recommended in pregnancy; culinary amounts in cooking are a different matter.
- MoringaCautionLeaf used as a food is generally considered low risk; bark, root and concentrated extracts are not recommended.
- Sea mossCautionNot generally recommended as a daily supplement — iodine content varies wildly and too much iodine affects the thyroid.
- Apple cider vinegarCautionPasteurised vinegar in food is generally considered low risk; unpasteurised 'with the mother' versions carry the same raw-product concern as other unpasteurised foods.
- Green tea extractNot recommendedConcentrated extracts are not generally recommended — they stack caffeine and have been linked with liver injury.
- Spirulina and chlorellaCautionNot generally recommended in pregnancy — algae products can be contaminated with heavy metals or microcystin toxins.
- CoQ10 (ubiquinone)Insufficient evidenceNot enough good evidence in pregnancy; most guidance suggests stopping once pregnant unless a clinician advises continuing.
- Myo-inositolCautionStudied for gestational diabetes prevention under medical supervision; don't self-start or continue without discussing it.
- Vitex (chasteberry)Not recommendedNot recommended in pregnancy because of its hormone activity; there is no good safety evidence.
- Maca rootInsufficient evidenceNot enough evidence in pregnancy; most guidance suggests stopping supplements once pregnant.
- Evening primrose oilNot recommendedNot recommended in pregnancy — concern around effects on the uterus and limited safety data.
- Soy isoflavone supplementsCautionNormal food soy is generally considered fine; concentrated isoflavone supplements are not recommended.
- Red cloverNot recommendedNot recommended in pregnancy because of oestrogenic activity and lack of safety data.
- Dong quaiNot recommendedAvoided in pregnancy due to uterine-stimulating and blood-thinning effects.
- DHEANot recommendedNot recommended in pregnancy; it's a hormone with no established safety profile.
- Royal jellyInsufficient evidenceNot enough evidence in pregnancy; allergy risk argues for caution.
Trimestly offers educational decision support, not a diagnosis. Nothing here is a promise that something is completely safe — check anything important with your doctor, midwife or pharmacist.