For Type 1 diabetes, using only Regular insulin is not recommended because it lacks the long-acting background (basal) coverage your body needs 24/7. While a combination involving Human Mixtard 70/30 (which contains 70% intermediate-acting insulin) provides some background coverage and is better than Regular alone, it is still not the ideal choice. The modern gold standard for Type 1 diabetes is a basal-bolus regimen: combining a dedicated long-acting insulin (like Glargine) with rapid-acting insulin before meals. This offers the safest, most flexible, and most precise blood sugar control. Please consult your doctor to tailor the best regimen for you.