Douglas Laboratories Methyl Folate L-5-MTHF

Our assessment

The evidence shows that Douglas Laboratories Methyl Folate L-5-MTHF is a specialized form of folate. Our assessment is that this supplement is primarily intended to support methylation and red blood cell formation, though specific data on this exact product is limited. You should be aware that the primary active ingredient, L-5-MTHF, is the bioavailable form of folate, but detailed mechanism and safety data for this specific product are not available from the provided data.

How it works

While data on this specific product is limited, the ingredient calcium is included in the label. Calcium works through bone mineralization, supporting bone density and mineral deposition. It also supports neuromuscular relaxation and nerve signaling [NIH ODS]. For the L-5-MTHF component, specific mechanistic data is not available in the provided data.

Safety profile

Data not available for this specific product. The FDA received a total of 592,059 adverse event reports across all dietary supplements, but no specific reports are linked to this product. For the calcium component, high levels of calcium in the blood and urine can cause constipation, nausea, weight loss, extreme tiredness, frequent need to urinate, abnormal heart rhythms, and a high risk of death from heart disease. Some research also suggests high calcium intakes might increase the risk of heart disease and prostate cancer [NIH ODS]. Specific side effect reports for Methyl Folate L-5-MTHF are not available.

Our recommendation

Based on the data provided, we cannot make a specific recommendation for Douglas Laboratories Methyl Folate L-5-MTHF due to missing safety and efficacy data. You should consult your healthcare provider before starting this supplement, especially if you take medications such as bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, or phenytoin, as calcium can reduce their absorption [NIH ODS]. Without specific clinical trial data or adverse event reports, we recommend proceeding with caution and seeking professional medical advice.

Supplement labels contain several key sections regulated by the FDA:

• Serving Size — The recommended amount per dose. Always check this — some products require multiple capsules per serving.
• Amount Per Serving — Shows the quantity of each nutrient in the product, typically in IU (International Units), mg (milligrams), or mcg (micrograms).
• % Daily Value (%DV) — Indicates how much a nutrient in a serving contributes to a daily diet. 5% DV or less is low; 20% DV or more is high.
• Other Ingredients — Lists inactive ingredients like fillers, binders, and capsule materials (e.g., gelatin, cellulose, magnesium stearate).
• Suggested Use — The manufacturer's recommended directions for taking the supplement, including timing and dosage.

Source: FDA Dietary Supplement Labeling Guide