Taking with a meal improves absorption of iron, fat-soluble vitamin D3, and the BioPerine carrier and keeps the iron gentle on your stomach
and Cook, Daniel (2024)
Age is another factor to consider
Hair Rituel by Sisley Revitalizing Fortifying Serum Key Ingredients: Copper peptides, Vitamin B6, zinc gluconate, licorice root extract Designed for sensitive scalps, this serum combines copper peptides with essential vitamins and minerals to strengthen roots and thicken strands
Adults who are overweight and have one or more weight-related medical disorders (such as diabetes, high blood pressure, or high cholesterol) are also permitted to use it
Still, excessive intake above 400 mcg a day from food and supplement sources combined -- can be problematic because it can lead to selenium toxicity, which can cause hair loss, gastrointestinal upset, and other health issues