If you're researching shilajit side effects before trying it, good — that's exactly what you should be doing. Shilajit has real benefits backed by real research, but it's not without considerations. Like any supplement, it interacts with your body in ways that depend on dosage, quality, and your individual health profile.
Here's what the science actually says about the risks, who should be cautious, and how to use shilajit safely.
Is Shilajit Safe?
The short answer: yes, for most people, when taken at recommended doses from a reputable source.
A 91-day clinical safety study published in Andrologia gave healthy adults 200mg of purified shilajit daily and found no adverse changes in blood pressure, heart rate, or body weight. Liver and kidney function markers stayed within normal range throughout the study. The researchers concluded that purified shilajit is safe for long-term human consumption at standard doses.
That said, "purified" is the key word. Raw, unprocessed shilajit scraped directly from rocks can contain heavy metals and contaminants. The safety profile only holds when you're taking a product that's been properly purified and third-party tested — which is why understanding what shilajit is and where it comes from matters before you buy.
Common Side Effects
Most people tolerate shilajit well, but some experience mild effects — especially in the first week or two as the body adjusts.
Digestive discomfort
Some users report mild nausea, stomach cramps, or loose stools when starting shilajit. This is more common with resin or powder forms taken on an empty stomach. Starting with a lower dose (100–200mg) and taking it with food usually resolves this. If you're deciding between forms, we break down the trade-offs in our shilajit gummies vs. resin comparison.
Headaches
Occasional headaches have been reported, particularly at higher doses. Shilajit enhances nutrient absorption and circulation, and the adjustment period can cause mild head pressure in some people. Staying hydrated and starting at a lower dose minimizes this.
Increased body heat
Shilajit has a warming effect in Ayurvedic classification. Some people notice feeling warmer than usual, especially during the first few days. This typically subsides as your body adapts and isn't considered harmful.
Serious Risks to Be Aware Of
These are less common but important to understand before starting.
Heavy metal contamination
This is the biggest real risk with shilajit — and it's entirely avoidable. Raw shilajit can contain elevated levels of lead, mercury, arsenic, and other heavy metals absorbed from the rock formations where it's found. A 2021 analysis found that several commercial shilajit products exceeded safe limits for lead and mercury.
The fix is simple: only buy shilajit that has been purified and provides a Certificate of Analysis (COA) from an independent, third-party lab. If a brand doesn't publish their heavy metal test results, don't buy it. Sunday Scaries Shilajit Gummies are third-party tested every batch for exactly this reason.
Allergic reactions
Rare, but possible. Shilajit contains a complex mix of organic compounds, humic acids, and minerals. People with sensitivities to any of these components could experience skin rash, itching, or in very rare cases, more serious allergic responses. If you have a history of supplement allergies, start with a small dose and monitor for 24–48 hours.
Changes in heart rate or blood pressure
Shilajit has been shown to mildly lower blood pressure in some studies. For most people this is neutral or beneficial, but if you're already on blood pressure medication, the combined effect could push levels too low. Monitor your blood pressure during the first couple of weeks if this applies to you.
Drug Interactions
Shilajit can interact with several types of medication. Talk to your doctor before starting if you take any of the following:
Blood pressure medication. Shilajit may enhance the blood-pressure-lowering effects, potentially causing hypotension (blood pressure dropping too low). Symptoms include dizziness, lightheadedness, and fatigue.
Blood thinners (anticoagulants). Some components of shilajit may have mild antiplatelet activity. If you're on warfarin, aspirin therapy, or other blood thinners, the combined effect could increase bleeding risk.
Diabetes medication. Shilajit has been shown to reduce blood glucose levels in some studies. If you're on insulin or oral diabetes medication, adding shilajit could cause blood sugar to drop too low without proper monitoring.
Thyroid medication. Shilajit contains iodine and other compounds that can influence thyroid hormone production. If you're on levothyroxine or other thyroid medications, shilajit could interfere with your dosing balance.
Iron supplements. Shilajit enhances iron absorption thanks to its fulvic acid content. This is a benefit for people who are iron-deficient — we cover this in detail in our shilajit benefits for women guide — but if your iron levels are already high (hemochromatosis), shilajit could push them further.
Who Should Avoid Shilajit
Pregnant or breastfeeding women. There's no clinical data on shilajit safety during pregnancy or breastfeeding. Until research says otherwise, it's best to avoid it during these periods.
Children. Shilajit hasn't been studied in children. Keep it to adults only.
People with hemochromatosis. If your body already stores too much iron, shilajit's ability to enhance iron absorption could make the condition worse.
Anyone with an active autoimmune condition. Shilajit has immune-modulating properties. If you have an autoimmune condition like lupus, rheumatoid arthritis, or multiple sclerosis, the immune-stimulating effects could potentially trigger flares. Consult your doctor first.
People with gout or high uric acid. Some research suggests shilajit may increase uric acid levels. If you're prone to gout attacks, monitor your levels closely or avoid shilajit altogether.
How to Minimize Side Effects
Most shilajit side effects are avoidable with the right approach:
Start low. Begin with 100–200mg daily for the first week. If you tolerate it well, increase to the standard 300–500mg range. There's no advantage to jumping straight to a high dose.
Take it with food. This reduces the chance of digestive discomfort, especially with resin or powder forms. Gummies are generally easier on the stomach since the shilajit is already buffered by the gummy base.
Take it in the morning. Shilajit supports energy production at the cellular level. Taking it later in the day could interfere with sleep for some people.
Stay hydrated. Shilajit enhances mineral transport and cellular metabolism. Drinking adequate water helps your body process these changes smoothly.
Buy purified, tested products only. This eliminates the heavy metal risk entirely. Look for brands that publish third-party COAs and list exact dosages — no proprietary blends. Sunday Scaries Shilajit Gummies deliver 300mg of purified shilajit per serving, third-party tested every batch.
The Bottom Line
Shilajit has a strong safety profile when taken correctly — purified, dosed at 200–500mg daily, from a tested source. The most common side effects are mild and temporary: a little digestive adjustment, occasional headaches, or a warming sensation. The serious risks — heavy metals, drug interactions, allergic reactions — are either avoidable (buy tested products) or manageable (talk to your doctor if you're on medication).
If you've been reading about the benefits and want to try it with minimal risk, start with a low dose of a third-party tested product, take it with food in the morning, and give your body 2–4 weeks to adjust. That's it.
