Browse Side Effects

Excessive intake, especially if introduced suddenly, can lead to fermentation-related gas production, causing bloating,...

Although generally better tolerated, very high doses may cause nausea, cramping, or diarrhea in sensitive individuals.

While much less common than with ferrous sulfate, mild GI upset, dark stools, or nausea can still occur in some individu...

Can cause mild stomach upset, nausea, diarrhea, or headache in some individuals.

May cause nausea, vomiting, or diarrhea in some individuals.

High doses may lead to gastrointestinal discomfort, including nausea and bloating.

Causes or contributes to Gastrointestinal Upset.

Causes or contributes to Gastrointestinal Upset (rare).

No serious side effects reported at typical supplemental doses. Even at high pharmacological doses (45 mg/day), it is we...

No known toxicity at high doses. Excess is excreted in urine. Rare reports of acne or gastrointestinal upset.

Causes or contributes to Gluten Sensitivity (Rare topical reaction).

Causes or contributes to Gut Microbiome Disruption.

Some animal and limited human studies suggest high doses may influence gut bacteria composition, though clinical relevan...

Causes or contributes to Hair Loss.

Causes or contributes to Headache.

Common systemic side effects related to rapid shifts in fluid balance.

Occasional reports of headache, dizziness, or palpitations.

Causes or contributes to Headaches.

Causes or contributes to Heartburn.

Kelp can bioaccumulate toxic heavy metals (e.g., arsenic, lead, cadmium) from seawater, posing a risk with long-term con...

As a plant-derived product, there is a potential risk of low-level arsenic or other heavy metal contamination, depending...

Low-quality sources from bones of industrially raised cattle may contain trace heavy metals (lead, cadmium). Choosing hi...

Side effects mirror those of the concentrated herb (e.g., Valerian may cause headache, dizziness, gastrointestinal upset...

Risk of adverse effects is entirely dependent on the herb. Can range from gastrointestinal discomfort to serious hepatot...